Mathlib triage dashboard

Welcome to the PR triage page! This page is perfect if you intend to look for pull request which seem to have stalled.
Feedback on designing this page or further information to include is very welcome.

This dashboard was last updated on: April 17, 2026 at 03:57 UTC

Quick links: PR statistics | Not yet landed PRs | Review status | Needs triage: unassigned PRs | Needs triage: assigned PRs | Likely-spurious CI failures | Tech debt PRs | PRs blocked on a zulip discussion | PRs with just a merge conflict | Stale new contributor PRs | PRs not into master | PRs with an 'approved' review | All open PRs | Other lists of PRs

Overall statistics

Found 2381 open PRs overall. Among these PRs

Approved, not yet landed PRs

At the moment,

Review status

There are currently 419 PRs awaiting review. Among these,

On the other hand, 113 PRs are unassigned and have not seen a status change in three days, and 20 PRs are assigned and have seen no review movement in two weeks.

These are triage-oriented views, not the main review queue. Updating a PR may remove it from one of these lists, but does not remove it from the review queue unless the PR's status changes out of awaiting review.

Needs triage: unassigned PRs on the review queue

Number Author Title Description Labels +/- Modified files (first 100) 📝 💬 All users who commented or reviewed Assignee(s) Approval(s) Updated Last status change total time in review
36786 SproutSeeds
author:SproutSeeds
 feat(DoubleCounting): parity of odd-degree vertices in bipartite incidence Adds `odd_card_filter_odd_bipartiteAbove_iff_odd_card_filter_odd_bipartiteBelow` to `Mathlib.Combinatorics.Enumerative.DoubleCounting`. This is the small parity-helper first step for #25231. Validation: - `lake build Mathlib.Combinatorics.Enumerative.DoubleCounting` Supersedes closed #36077 after replaying the helper cleanly on current `master`. AI usage: used Codex for branch recovery, replay onto current `master`, and draft wording; final code choices and verification by me. new-contributor t-combinatorics large-import 17/0 Mathlib/Combinatorics/Enumerative/DoubleCounting.lean 1 2 ['github-actions'] nobody none
30-5088
30 days ago
30-5171
30 days ago
30-5160
30 days
34797 vlad902
author:vlad902
 feat(SimpleGraph): `cycleGraph.cycle` is a cycle (A follow-up PR will show that `cycleGraph.cycle` is also hamiltonian.) --- - [x] depends on: #35360 - [x] depends on: #34766 - [x] depends on: #34796 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 32/1 Mathlib/Combinatorics/SimpleGraph/Circulant.lean 1 7 ['Ruben-VandeVelde', 'github-actions', 'mathlib-dependent-issues', 'vlad902'] nobody none
26-40075
26 days ago
28-36478
28 days ago
29-65386
29 days
35655 Rida-Hamadani
author:Rida-Hamadani
 feat(SimpleGraph): strongly regular graphs have diameter 2 A strongly regular graph with positive `μ` must have diameter 2, as long as the vertex set is nontrivial and it is not complete. --- - [x] depends on: #35657 This statement is useful in the literature, I wanted to add it after seeing it being used in the proof of the Hoffman-Singleton theorem. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 18/0 Mathlib/Combinatorics/SimpleGraph/StronglyRegular.lean 1 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody none
25-25449
25 days ago
25-27048
25 days ago
25-42555
25 days
34633 mitchell-horner
author:mitchell-horner
 feat(Combinatorics/SimpleGraph): define the Zarankiewicz function Defines the Zarankiewicz function $z(m, n; s, t)$ in terms of bipartite graphs. --- - [x] depends on: #34632 This comes from splitting up #25841 into smaller PRs. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 156/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/Zarankiewicz.lean,Mathlib/Combinatorics/SimpleGraph/Maps.lean 3 5 ['b-mehta', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mitchell-horner'] nobody none
24-66872
24 days ago
24-66937
24 days ago
24-72507
24 days
37109 zeekmartin
author:zeekmartin
 feat(SimpleGraph): card of common neighbors equals card of triangles containing edge Adds `SimpleGraph.card_commonNeighbors_eq_card_triangles_containing_edge` to `Mathlib/Combinatorics/SimpleGraph/Clique.lean`. For adjacent vertices `u v` in a finite simple graph, establishes the bijection between common neighbors and 3-cliques containing the edge `{u, v}`: ```lean theorem card_commonNeighbors_eq_card_triangles_containing_edge {u v : α} (huv : G.Adj u v) : (G.commonNeighbors u v).toFinset.card = ((G.cliqueFinset 3).filter fun s => {u, v} ⊆ s).card ``` This connects `commonNeighbors` (defined in `Basic.lean`) with `cliqueFinset` — a gap not previously covered in `Clique.lean`. **AI disclosure**: Claude (Anthropic) was used as an assistant during the development of this proof. It helped with the initial proof structure and tactic suggestions. The proof was reviewed and validated step by step by the author, who can vouch for all the content. The mathematical idea originates from the author's prior Lean 4 work on spectral graph theory (github.com/zeekmartin/topostability-lean4). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics LLM-generated new-contributor 61/0 Mathlib/Combinatorics/SimpleGraph/Clique.lean 1 7 ['SnirBroshi', 'github-actions', 'zeekmartin'] nobody none
23-36047
23 days ago
23-43206
23 days ago
23-43195
23 days
36850 whocares-abt
author:whocares-abt
 feat(Combinatorics/SimpleGraph/Acyclic): add delete leaf from tree gives tree Added theorem stating Deleting a leaf from a tree produces a tree. t-combinatorics new-contributor 5/0 Mathlib/Combinatorics/SimpleGraph/Acyclic.lean 1 7 ['github-actions', 'vlad902'] nobody none
22-49188
22 days ago
26-74176
26 days ago
28-57021
28 days
37131 IvanRenison
author:IvanRenison
 doc(Combinatorics/SimpleGraph/Partition): improve docstrings in `SimpleGraph.Partition` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 11/16 Mathlib/Combinatorics/SimpleGraph/Partition.lean 1 1 ['github-actions'] nobody none
20-83314
20 days ago
23-15925
23 days ago
23-15914
23 days
37006 hakii6
author:hakii6
 feat(LinearAlgebra/Matrix/Block, Analysis/Normed/Algebra/MatrixExponential): add BlockTriangular.pow and BlockTriangular.exp # Summary Add BlockTriangular.pow and BlockTriangular.exp for proving "det (exp A) = exp (trace A)" # Which part using LLM The part I used LLM is for 1. Searching duplicated theorems and lemmas I may missed (I already search them myself first). 2. Help me handle the "variables and signatures", the "letI" part, some of lemmas and theorems trivial but hard to find the true one. 3. After I finished, let them helped me check the structure match the disciplines of mathlib. 4. Check the steps PR match the disciplines of mathlib Most things above are done by me first, then let them to make sure I'm not missing something. # More context More context can be found in a topic in "# new member" in Zulip [#new members > (Matrix and NormedSpace.exp) | det (exp A) = exp (trace A)](https://leanprover.zulipchat.com/#narrow/channel/113489-new-members/topic/.28Matrix.20and.20NormedSpace.2Eexp.29.20.7C.20det.20.28exp.20A.29.20.3D.20exp.20.28trace.20A.29/with/580964688) new-contributor LLM-generated 54/1 Mathlib/Analysis/Normed/Algebra/MatrixExponential.lean,Mathlib/LinearAlgebra/Matrix/Block.lean,Mathlib/Topology/Instances/Matrix.lean 3 59 ['SnirBroshi', 'eric-wieser', 'github-actions', 'hakii6', 'wwylele'] nobody none
18-16445
18 days ago
20-19413
20 days ago
25-10627
25 days
37373 IvanRenison
author:IvanRenison
 feat(Combinatorics/SimpleGraph/Sum): add `LocallyFinite (G ⊕g H)` instance --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 11/0 Mathlib/Combinatorics/SimpleGraph/Sum.lean 1 3 ['SnirBroshi', 'github-actions', 'themathqueen'] nobody none
17-45429
17 days ago
17-48912
17 days ago
17-48901
17 days
37461 grunweg
author:grunweg
 chore: golf using the field tactic --- In the spirit of #31314. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 32/43 Counterexamples/NowhereDifferentiable.lean,Mathlib/Analysis/Calculus/Monotone.lean,Mathlib/Analysis/Complex/BorelCaratheodory.lean,Mathlib/Analysis/MeanInequalities.lean,Mathlib/Analysis/Normed/Field/Lemmas.lean,Mathlib/Analysis/SpecialFunctions/Complex/LogBounds.lean,Mathlib/Analysis/SpecialFunctions/Elliptic/Weierstrass.lean,Mathlib/Analysis/SpecialFunctions/Integrals/Basic.lean,Mathlib/InformationTheory/KullbackLeibler/Basic.lean,Mathlib/LinearAlgebra/Lagrange.lean,Mathlib/MeasureTheory/Integral/MeanValue.lean,Mathlib/NumberTheory/ModularForms/Discriminant.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/E2/Defs.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/E2/MDifferentiable.lean,Mathlib/NumberTheory/ModularForms/QExpansion.lean,Mathlib/Probability/CentralLimitTheorem.lean,Mathlib/Probability/Distributions/Gaussian/CharFun.lean,Mathlib/RepresentationTheory/Homological/GroupCohomology/Hilbert90.lean,Mathlib/RingTheory/PowerSeries/Exp.lean,Mathlib/Topology/UnitInterval.lean 20 4 ['github-actions', 'grunweg', 'j-loreaux'] nobody none
15-71325
15 days ago
15-72627
15 days ago
15-79088
15 days
37482 grunweg
author:grunweg
 chore: test two consecutive simps in the flexible linter They are not linted, and should not be --- let's add a test to document this. Found when reviewing #36728. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) easy 9/1 MathlibTest/FlexibleLinter.lean 1 1 ['github-actions'] nobody none
15-66354
15 days ago
15-66419
15 days ago
15-66408
15 days
37179 IvanRenison
author:IvanRenison
 feat(Combinatorics/SimpleGraph): add lemmas about left and right elements of `SimpleGraph.sum` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 18/0 Mathlib/Combinatorics/SimpleGraph/Sum.lean 1 3 ['WilliamCoram', 'github-actions'] nobody none
15-58987
15 days ago
22-25518
22 days ago
22-25507
22 days
36886 Deep0Thinking
author:Deep0Thinking
 feat(Combinatorics/Enumerative/Bonferroni): add Bonferroni inequalities This PR adds Bonferroni inequalities. Main theorems: - `Finset.indicator_biUnion_le_bonferroniIndicator_of_odd` - `Finset.bonferroniIndicator_le_indicator_biUnion_of_even` - `Finset.card_biUnion_le_bonferroniCard_of_odd` - `Finset.bonferroniCard_le_card_biUnion_of_even` Co-authored-by: Claude (Opus 4.6) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor 334/4 Mathlib.lean,Mathlib/Combinatorics/Enumerative/Bonferroni.lean,Mathlib/Combinatorics/Enumerative/InclusionExclusion.lean 3 4 ['AlexeyMilovanov', 'Deep0Thinking', 'github-actions'] nobody none
15-53463
15 days ago
27-46111
27 days ago
27-46929
27 days
37443 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Walks/Operations): permutations of support --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 15/0 Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Operations.lean 2 2 ['github-actions', 'mathlib-merge-conflicts'] nobody none
15-20345
15 days ago
15-20370
15 days ago
16-30251
16 days
32583 MJ141592
author:MJ141592
 refactor(SimpleGraph): change bridges not to require the edge to be present Remove the requirement for edges to exist in definition of isBridge, and then change the related lemmas to adjust for this, by renaming, fixing the statements and fixing the proofs, including in Acyclic. Closes #31690. --- - [x] depends on: #36802 - [x] depends on: #36804 t-combinatorics new-contributor 84/84 Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/Connected.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/EdgeConnectivity.lean,Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean 4 20 ['MJ141592', 'SnirBroshi', 'YaelDillies', 'b-mehta', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] nobody none
14-68155
14 days ago
14-68191
14 days ago
15-10301
15 days
37541 EtienneC30
author:EtienneC30
 feat: another version of the cardinality of the difference In mathlib there is `Set.ncard_diff` which states that `(t \ s).ncard = t.ncard - s.ncard` when `s ⊆ t` and `s` is finite. But one way to prove that `s` is finite is by showing that `t` is finite and using the `s ⊆ t` hypothesis, so this PR adds `Set.ncard_diff'` which assumes that `t` is finite instead of `s`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 5/0 Mathlib/Data/Set/Card.lean 1 1 ['github-actions'] nobody none
14-52312
14 days ago
14-52383
14 days ago
14-52372
14 days
37574 IvanRenison
author:IvanRenison
 feat(Combinatorics/SimpleGraph): Add lemma `Walk.IsCircuit.isCycle_cycleBypass` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 8/3 Mathlib/Combinatorics/SimpleGraph/Paths.lean 1 1 ['github-actions'] nobody none
14-21808
14 days ago
14-21877
14 days ago
14-21866
14 days
37577 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Walk): upgrade subset theorems to sublist/prefix/suffix Upgrades theorems about `p.support ⊆ q.support` / `p.darts ⊆ q.darts` / `p.edges ⊆ q.edges` to `List.IsInfix`/`List.IsSuffix`/`List.Sublist`, which imply the subset versions. --- I did not add such theorems where there was no subset theorem to begin with (e.g. `(p.take n).darts <+: p.darts`), as they are usually not worth stating since they're trivial and simp proves them. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 77/37 Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Decomp.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Operations.lean 4 1 ['github-actions'] nobody none
14-20447
14 days ago
14-20523
14 days ago
14-20512
14 days
37576 WenrongZou
author:WenrongZou
 feat(MvPowerSeries): connection between rename and subst --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory large-import 33/6 Mathlib/RingTheory/MvPowerSeries/Basic.lean,Mathlib/RingTheory/MvPowerSeries/Rename.lean 2 3 ['BryceT233', 'WenrongZou', 'github-actions'] nobody none
14-6921
14 days ago
14-20742
14 days ago
14-20731
14 days
36832 KryptosAI
author:KryptosAI
 chore(Data/Finset/Card): rename `pred_card_le_card_erase` to `sub_one_card_le_card_erase` ## Summary The name `pred_card_le_card_erase` suggests `Nat.pred` but the statement uses `- 1` (i.e., `Nat.sub 1`). Rename to `sub_one_card_le_card_erase` to match the actual statement. A deprecated alias is added for backwards compatibility. ### Files changed - `Mathlib/Data/Finset/Card.lean` — definition renamed + deprecated alias - `Mathlib/Data/Finset/Powerset.lean` — reference updated - `Mathlib/Combinatorics/Additive/SubsetSum.lean` — reference updated - `Mathlib/Algebra/Polynomial/EraseLead.lean` — reference updated Addresses the `Finset.pred_card_le_card_erase` item in #21584. ## AI disclosure I used Claude Code to explore the codebase (finding all references to rename) and to draft the PR description. I reviewed and understand all changes — these are straightforward renames with a deprecated alias. new-contributor 22/15 Mathlib/Algebra/Polynomial/EraseLead.lean,Mathlib/Combinatorics/Additive/SubsetSum.lean,Mathlib/Combinatorics/SetFamily/AhlswedeZhang.lean,Mathlib/Combinatorics/SetFamily/Shadow.lean,Mathlib/Data/Finset/Card.lean,Mathlib/Data/Finset/Powerset.lean,Mathlib/Data/Set/Card.lean,Mathlib/GroupTheory/Perm/Support.lean,Mathlib/RingTheory/Ideal/Operations.lean 9 5 ['KryptosAI', 'Multramate', 'github-actions', 'ooovi'] nobody 1
14-6748
14 days ago
14-6806
14 days ago
28-17123
28 days
36814 YaelDillies
author:YaelDillies
 refactor(Combinatorics/SimpleGraph): no proof obligation in `rotate` If the walk doesn't go through the new vertex, return `nil` instead. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 44/31 Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/Connected.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/Subgraph.lean,Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean,Mathlib/Combinatorics/SimpleGraph/Matching.lean,Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Decomp.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Operations.lean 8 8 ['SnirBroshi', 'YaelDillies', 'b-mehta', 'eric-wieser', 'github-actions', 'mathlib-merge-conflicts'] nobody none
13-66406
13 days ago
13-66429
13 days ago
27-50246
27 days
37248 harahu
author:harahu
 doc(Tactic): avoid lazy continuation lines We resolve the ambiguity inherent in lazy (un-indented) list item continuation lines by either indenting them or separating them by inserting a newline in the cases where the item continuation was a mistake. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) documentation 131/116 Mathlib/Tactic/Algebraize.lean,Mathlib/Tactic/Basic.lean,Mathlib/Tactic/CategoryTheory/Coherence/PureCoherence.lean,Mathlib/Tactic/ComputeDegree.lean,Mathlib/Tactic/DepRewrite.lean,Mathlib/Tactic/Finiteness.lean,Mathlib/Tactic/FunProp.lean,Mathlib/Tactic/FunProp/Core.lean,Mathlib/Tactic/FunProp/Theorems.lean,Mathlib/Tactic/Linarith/Oracle/FourierMotzkin.lean,Mathlib/Tactic/Linter/FlexibleLinter.lean,Mathlib/Tactic/MinImports.lean,Mathlib/Tactic/MoveAdd.lean,Mathlib/Tactic/Order.lean,Mathlib/Tactic/SimpIntro.lean,Mathlib/Tactic/Simps/Basic.lean,Mathlib/Tactic/Widget/InteractiveUnfold.lean 17 1 ['Multramate', 'github-actions'] nobody 1
13-51352
13 days ago
21-14885
21 days ago
21-20571
21 days
37495 IvanRenison
author:IvanRenison
 feat(Combinatorics/SimpleGraph/Sum): add homomorphism, embedding and isomorphism of sums --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 58/2 Mathlib/Combinatorics/SimpleGraph/Sum.lean 1 15 ['IvanRenison', 'YaelDillies', 'github-actions', 'mkaratarakis'] nobody none
13-50202
13 days ago
13-51353
13 days ago
14-83355
14 days
34759 Hagb
author:Hagb
 feat(RingTheory/MvPolynomial/MonomialOrder): add degree with `⊥` as degree of `0` `withBotDegree` is to distinguish the degree of zero polynomial from the degree of non-zero constant polynomial. `MonomialOrder.degree` of both are 0, while `withBotDegree` is `⊥` for zero polynomial and 0 for non-zero constant polynomial. `MonomialOrder.withBotDegree` is to [`MonomialOrder.degree`](https://leanprover-community.github.io/mathlib4_docs/find/?pattern=MonomialOrder.degree#doc) as [`Polynomial.degree`](https://leanprover-community.github.io/mathlib4_docs/find/?pattern=Polynomial.degree#doc) is to [`Polynomial.natDegree`](https://leanprover-community.github.io/mathlib4_docs/find/?pattern=Polynomial.natDegree#doc). It's upstreamized from https://github.com/WuProver/groebner_proj. --- It's upstream from [`Groebner/MonomialOrder.lean` in the repo `WuProver/groebner_proj`](https://github.com/WuProver/groebner_proj/blob/main/Groebner/MonomialOrder.lean). - [x] ~~depends on: #34755~~ - [x] depends on: #34756 - [x] depends on: #34758 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 245/2 Mathlib/Data/Finsupp/MonomialOrder.lean,Mathlib/RingTheory/MvPolynomial/MonomialOrder.lean 2 5 ['github-actions', 'joneugster', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody none
13-38606
13 days ago
13-40044
13 days ago
13-42130
13 days
37245 DavidLedvinka
author:DavidLedvinka
 feat(MeasureTheory): add Resolvent (Stieltjes/Cauchy) Transform This PR adds the definition of the `resolventTransform` of a measure and some API. This is a non-standard notion that generalizes both the Stieltjes Transform and Cauchy Transform of a (real-valued) measure so that (for example) the proof that these transforms define holomorphic functions off the support of the measure can be given for both at once. Perhaps these important special cases could be made into abbrevs? - [ ] depends on: #37172 189/0 Mathlib.lean,Mathlib/Algebra/Algebra/Spectrum/Basic.lean,Mathlib/MeasureTheory/Measure/ResolventTransform.lean 3 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody none
13-36421
13 days ago
13-36465
13 days ago
14-17979
14 days
37399 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Paths): `IsPath` and `Nil` lemmas --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 10/3 Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Combinatorics/SimpleGraph/Paths.lean 2 4 ['Rida-Hamadani', 'SnirBroshi', 'github-actions'] nobody none
13-31779
13 days ago
17-2890
17 days ago
17-3023
17 days
37624 IvanRenison
author:IvanRenison
 feat(Combinatorics/SimpleGraph/Maps): add theorems about composition --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 25/4 Mathlib/Combinatorics/SimpleGraph/Maps.lean 1 1 ['github-actions'] nobody none
13-16649
13 days ago
13-16723
13 days ago
13-16712
13 days
37561 IvanRenison
author:IvanRenison
 feat(Data/List): add lemma `List.notMem_subset` --- Zulip question: https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/List.2EnotMem_subset/with/583146215 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 3/0 Mathlib/Data/List/Basic.lean 1 1 ['github-actions'] nobody none
13-13069
13 days ago
14-35565
14 days ago
14-35554
14 days
37593 IlPreteRosso
author:IlPreteRosso
 refactor(Data.Finset.*Antidiagonal): rename set-based defs to `set*Antidiagonal` Renames set-based `Finset.mulAntidiagonal` → `setMulAntidiagonal` (and SMul/VAdd variants) to free the `mulAntidiagonal` name for the planned `HasMulAntidiagonal` typeclass. Deprecation aliases added. Supersedes #34551 t-ring-theory new-contributor 178/96 Mathlib/Algebra/Order/Antidiag/Prod.lean,Mathlib/Data/Finset/MulAntidiagonal.lean,Mathlib/Data/Finset/SMulAntidiagonal.lean,Mathlib/RingTheory/HahnSeries/Multiplication.lean,Mathlib/RingTheory/HahnSeries/PowerSeries.lean,Mathlib/RingTheory/HahnSeries/Summable.lean 6 2 ['github-actions'] nobody none
12-86393
12 days ago
13-49639
13 days ago
13-51402
13 days
37636 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Copy): a graph is inducingly contained in another iff it's equivalent to an induced graph This is a version of `isIndContained_iff_exists_iso_subgraph` using `SimpleGraph.induce` instead of `Subgraph.IsInduced`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 8/0 Mathlib/Combinatorics/SimpleGraph/Copy.lean,Mathlib/Combinatorics/SimpleGraph/Maps.lean 2 1 ['github-actions'] nobody none
12-38747
12 days ago
12-38786
12 days ago
12-38859
12 days
36833 harahu
author:harahu
 doc: demote repeated H1 headers Having more than one H1 header per file confuses search engines and thus makes documentation more difficult to find. Hence, we make sure that lean files only have a single H1 header in them. In the case of `Mathlib/Tactic/Common.lean`, we achieve this by adding a new module header. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) documentation 12/10 Archive/Imo/Imo2002Q3.lean,Archive/Imo/Imo2010Q5.lean,Mathlib/Geometry/Manifold/VectorBundle/LocalFrame.lean,Mathlib/Probability/Distributions/Gaussian/HasGaussianLaw/Basic.lean,Mathlib/RingTheory/LocalProperties/Injective.lean,Mathlib/RingTheory/LocalProperties/ProjectiveDimension.lean,Mathlib/RingTheory/QuasiFinite/Weakly.lean,Mathlib/Tactic/Common.lean,Mathlib/Tactic/Linter/EmptyLine.lean 9 2 ['github-actions', 'harahu', 'vihdzp'] nobody 1
12-30518
12 days ago
12-30574
12 days ago
12-30967
12 days
37646 SnirBroshi
author:SnirBroshi
 feat(Logic): surjective embeddings are equivs Upgrade `Equiv.ofBijective` / `Embedding.equivOfSurjective` / `RelIso.ofSurjective` to equivalences. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic 27/1 Mathlib/Logic/Embedding/Basic.lean,Mathlib/Logic/Equiv/Defs.lean,Mathlib/Order/RelIso/Basic.lean 3 1 ['github-actions'] nobody none
12-15
12 days ago
12-19701
12 days ago
12-19690
12 days
37649 IvanRenison
author:IvanRenison
 feat(Data): add theorem `Finset.image_eq_iff_eq_preimage` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 20/0 Mathlib/Data/Finset/Preimage.lean,Mathlib/Data/Set/Function.lean 2 3 ['github-actions', 'themathqueen'] nobody none
11-44785
11 days ago
12-14874
12 days ago
12-14863
12 days
37675 vihdzp
author:vihdzp
 feat: `Order.cof Ordinal = univ` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory t-order 11/0 Mathlib/SetTheory/Cardinal/Cofinality.lean 1 1 ['github-actions'] nobody none
11-26232
11 days ago
11-26306
11 days ago
11-26295
11 days
37676 IvanRenison
author:IvanRenison
 feat(Data/Finset/Preimage): add lemmas about `Equiv.symm` --- `Finset` version of lemmas already existing for `Set`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 15/0 Mathlib/Data/Finset/Preimage.lean 1 1 ['github-actions'] nobody none
11-23162
11 days ago
11-23243
11 days ago
11-23232
11 days
36643 Thmoas-Guan
author:Thmoas-Guan
 feat(Homology): interaction of projective and injective dimension and SES In this PR, we directly implemented the relation of `projectiveDimension` and `injectiveDimension` in SES. --- - [ ] depends on: #36817 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 159/0 Mathlib/CategoryTheory/Abelian/Injective/Dimension.lean,Mathlib/CategoryTheory/Abelian/Projective/Dimension.lean 2 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody none
10-79398
10 days ago
10-79421
10 days ago
17-28451
17 days
37702 grunweg
author:grunweg
 chore: golf using {norm,push}_cast Not exhaustive --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 23/22 Archive/Imo/Imo2025Q3.lean,Mathlib/Algebra/Ring/GeomSum.lean,Mathlib/Analysis/Asymptotics/LinearGrowth.lean,Mathlib/Analysis/Fourier/FourierTransformDeriv.lean,Mathlib/Analysis/PSeries.lean,Mathlib/Data/Int/Log.lean,Mathlib/GroupTheory/CommutingProbability.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/QExpansion.lean,Mathlib/NumberTheory/SumFourSquares.lean,Mathlib/RingTheory/DividedPowers/RatAlgebra.lean,Mathlib/RingTheory/LittleWedderburn.lean,Mathlib/RingTheory/WittVector/WittPolynomial.lean 12 5 ['github-actions', 'grunweg', 'j-loreaux'] nobody none
10-23852
10 days ago
10-23852
10 days ago
10-35807
10 days
37724 xgenereux
author:xgenereux
 feat(UniqueFactorizationDomain/Multiplicity): WfDvdMonoid.max_power_factor for finset A version of `WfDvdMonoid.max_power_factor` for finsets/finsupp. That is, we take the highest power which divides everything in the finset. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 66/10 Mathlib/RingTheory/UniqueFactorizationDomain/Multiplicity.lean 1 1 ['github-actions'] nobody none
10-5902
10 days ago
10-5984
10 days ago
10-5973
10 days
37690 yuanyi-350
author:yuanyi-350
 feat(Combinatorics/Enumerative/Bell): sum over partition shapes ## Summary - add multiplicative lemmas relating `Multiset.bell` when inserting a part - prove `Nat.bell` as a sum of `Multiset.bell` over partition shapes - Kill TODO in `Mathlib/Combinatorics/Enumerative/Bell.lean` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 153/16 Mathlib/Combinatorics/Enumerative/Bell.lean 1 1 ['github-actions'] nobody none
9-71314
9 days ago
10-69939
10 days ago
10-69928
10 days
37747 JovanGerb
author:JovanGerb
 chore(Order/Filter/AtTopBot/Basic): use `to_dual` This PR uses `to_dual` for `atTop`/`atBot`. A lot of theorems that have been tagged contain the expression `∀ a ≥ b, ...`, which means that their dual will be `∀ a, b ≥ a → ...`, which is obviourly undesirable. Hence, I would like to ask the reviewers to reconsider the possibility of merging #32985. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 56/164 Mathlib/Order/Filter/AtTopBot/Basic.lean 1 1 ['github-actions'] nobody none
9-48712
9 days ago
9-48788
9 days ago
9-48777
9 days
37762 EtienneC30
author:EtienneC30
 feat: scalar multiplication of an `NNReal` against `1 : ENNReal` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 4/3 Mathlib/Data/ENNReal/Action.lean,Mathlib/MeasureTheory/Measure/Typeclasses/Probability.lean,Mathlib/Probability/Distributions/SetBernoulli.lean 3 1 ['github-actions'] nobody none
9-41304
9 days ago
9-41367
9 days ago
9-42599
9 days
37752 JovanGerb
author:JovanGerb
 chore(Order/CompleteLattice/Lemmas): use `to_dual` Use `to_dual` for lemmas about `CompleteLattice`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 27/56 Mathlib/Order/CompleteLattice/Lemmas.lean 1 1 ['github-actions', 'vihdzp'] nobody 1
9-40806
9 days ago
9-47464
9 days ago
9-47453
9 days
37753 JovanGerb
author:JovanGerb
 chore(Order/Filter/Basic): use `to_dual` for `≤ᶠ` Use `to_dual` on lemmas about `EventuallyLE`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 19/6 Mathlib/Order/Filter/Basic.lean 1 2 ['github-actions', 'vihdzp'] nobody 1
9-40717
9 days ago
9-47329
9 days ago
9-47318
9 days
37744 AntoineChambert-Loir
author:AntoineChambert-Loir
 feat(RingTheory/Ideal/IsAugmentation): define the concept of an augmentation ideal Define an augmentation ideal in an R-algebra A: this is an `Ideal A` which is a complement to `⊥ : Subalgebra R A` in `A`. (This subalgebra consists of `R`-multiples of `1`.) Co-authored with: @mariainesdff --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 98/3 Mathlib.lean,Mathlib/Algebra/Algebra/Subalgebra/Tower.lean,Mathlib/Algebra/Module/Submodule/RestrictScalars.lean,Mathlib/RingTheory/Ideal/IsAugmentation.lean 4 1 ['github-actions'] nobody none
9-38497
9 days ago
9-38497
9 days ago
9-38876
9 days
37642 SnirBroshi
author:SnirBroshi
 chore(Combinatorics/SimpleGraph): tidy various files --- Concept inspired by @Ruben-VandeVelde :) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 89/72 Mathlib/Combinatorics/SimpleGraph/Coloring/VertexColoring.lean,Mathlib/Combinatorics/SimpleGraph/Copy.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/Basic.lean,Mathlib/Combinatorics/SimpleGraph/IncMatrix.lean,Mathlib/Combinatorics/SimpleGraph/Maps.lean,Mathlib/Combinatorics/SimpleGraph/Trails.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Operations.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Subwalks.lean 8 2 ['SnirBroshi', 'github-actions'] nobody none
9-35273
9 days ago
9-35333
9 days ago
11-51959
11 days
37738 khwilson
author:khwilson
 feat(Topology/Order/Bornology): generalize `cobounded_eq` `Real.cobounded_eq` and `Int.cobounded_eq` are used in several places throughout Mathlib. They are currently proved in terms of the Metric topology on `Int` and `Real`, but they're really properties of the order bornology on those objects. Generalize those constructions to `IsOrderBornology` for `LinearOrder`'s and add a few more constructions that are true in other circumstances, e.g., `cobounded NNReal = .atTop` follows from the fact that `NNReal` is both `NoMaxOrder` and `OrderBot`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) maintainer-merge t-order 57/18 Mathlib/Analysis/Polynomial/Basic.lean,Mathlib/Analysis/SpecialFunctions/Complex/LogBounds.lean,Mathlib/Topology/Instances/Int.lean,Mathlib/Topology/Instances/Real/Lemmas.lean,Mathlib/Topology/Order/Bornology.lean 5 14 ['YaelDillies', 'github-actions', 'khwilson', 'vihdzp'] nobody 2
9-16989
9 days ago
9-54935
9 days ago
9-55767
9 days
37784 SnirBroshi
author:SnirBroshi
 feat(Order/ConditionallyCompleteLattice/Basic): `ConditionallyCompleteLinearOrderBot (WithBot α)` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 29/0 Mathlib/Order/ConditionallyCompleteLattice/Basic.lean 1 1 ['github-actions'] nobody none
9-6214
9 days ago
9-6289
9 days ago
9-6278
9 days
37544 SnirBroshi
author:SnirBroshi
 chore(Combinatorics/SimpleGraph/Coloring): move `ConcreteColorings.lean` and `EdgeLabeling.lean` to `Coloring/` Moves `SimpleGraph/ConcreteColorings.lean` to `SimpleGraph/Coloring/Constructions.lean` and `SimpleGraph/EdgeLabeling.lean` to `SimpleGraph/Coloring/EdgeLabeling.lean`. See [Zulip](https://leanprover.zulipchat.com/#narrow/channel/252551-graph-theory/topic/Coloring.20module.20names/with/583281500) --- [Zulip](https://leanprover.zulipchat.com/#narrow/channel/252551-graph-theory/topic/Coloring.20module.20names/with/583281500) might want to rename `ConcreteColorings` (Edit: the poll chose `Constructions.lean`) #37546 adds module deprecations [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed t-combinatorics maintainer-merge 2/2 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Coloring/Constructions.lean,Mathlib/Combinatorics/SimpleGraph/Coloring/EdgeLabeling.lean 3 2 ['YaelDillies', 'github-actions', 'ooovi'] nobody 2
8-67705
8 days ago
11-48157
11 days ago
11-48290
11 days
37530 mcdoll
author:mcdoll
 fix(Topology/Algebra): fix bad simps and make arguments implicit for `PointwiseConvergenceCLM` We delete all `simps` calls in the definitions of operators on `PointwiseConvergenceCLM` and replace them with `apply_apply` lemmas that do not abuse the defeq between `SLₚₜ` and `SL`. This made the linter discover some typeclass duplications, which we remove by restructuring the file. As a consequence of the new `simp` lemmas, we can remove all `set_option backward.isDefEq.respectTransparency false in` in `Analysis.Distribution.TemperedDistribution`. Moreover, we make several arguments implicit, which can be inferred in almost all practical situations. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) not-ready-to-merge 88/69 Mathlib/Analysis/Distribution/TemperedDistribution.lean,Mathlib/Topology/Algebra/Module/Spaces/PointwiseConvergenceCLM.lean 2 4 ['github-actions', 'jcommelin', 'mathlib-merge-conflicts', 'mcdoll'] nobody none
8-65493
8 days ago
9-16402
9 days ago
12-49551
12 days
37342 vasnesterov
author:vasnesterov
 feat(Tactic/ComputeAsymptotics/Multiseries): non-primitive corecursion for Seq: more `FriendlyOperation` API This is a continuation of #35072. This PR adds more API about friendly operations: * `FriendlyOperation.coind`: a coinductive principle for proving that operation is friendly * `FriendlyOperationClass.eq_of_bisim`: a generalisation of `Seq.eq_of_bisim'` for proving two sequences are equal. --- - [x] depends on: #35072 This is a part of the `compute_asymptotics` tactic (#28291). [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data t-meta 161/0 Mathlib/Tactic/ComputeAsymptotics/Multiseries/Corecursion.lean 1 2 ['github-actions', 'mathlib-dependent-issues'] nobody none
8-62426
8 days ago
14-53293
14 days ago
14-53614
14 days
37800 dtumad
author:dtumad
 feat(Probability): Add definition of `SPMF` based on existing `PMF` This PR adds a definition of `SPMF A` based on the existing `PMF A` definition, and adds basic monadic operations on them. --- There's a few different projects now using a definition along these lines so it would be good to align things. I tried to just port just the most basic things for now until the definitions can be agreed on. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor 231/0 Mathlib.lean,Mathlib/Probability/ProbabilityMassFunction/Basic.lean,Mathlib/Probability/ProbabilityMassFunction/Constructions.lean,Mathlib/Probability/ProbabilityMassFunction/Monad.lean,Mathlib/Probability/ProbabilityMassFunction/SPMF.lean,Mathlib/Topology/Algebra/InfiniteSum/Basic.lean 6 2 ['github-actions'] nobody none
8-53277
8 days ago
8-53341
8 days ago
8-55047
8 days
37603 Parcly-Taxel
author:Parcly-Taxel
 refactor: review of `SetSemiring` * Rename `Set.up` and `SetSemiring.down` to `SetSemiring.ofSet` and `SetSemiring.toSet` respectively. Unprotect both and make them equivalences, following `FreeMonoid`. * Derive `CompleteAtomicBooleanAlgebra` for `SetSemiring` immediately. * Add `imageHom_id` and `imageHom_comp`. The three existing lemmas about `imageHom` are coalesced into `imageHom_apply`. Ultimately inspired by https://github.com/leanprover-community/mathlib4/pull/36934#issuecomment-4183475568. maintainer-merge 120/165 Mathlib/Algebra/Algebra/Operations.lean,Mathlib/Data/Set/Semiring.lean 2 41 ['Parcly-Taxel', 'YaelDillies', 'eric-wieser', 'github-actions', 'mathlib-merge-conflicts', 'sgouezel'] nobody 1
8-48463
8 days ago
8-48721
8 days ago
9-76114
9 days
37185 gasparattila
author:gasparattila
 chore(Data/Finset/Lattice/Fold): rename `comp_sup_*` to `apply_sup_*` These lemmas are of the form `g (s.sup f) = s.sup (g ∘ f)` with no composition on the LHS. --- - [x] depends on: #37047 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 44/26 Mathlib/Algebra/Order/Ring/Finset.lean,Mathlib/Analysis/CStarAlgebra/Basic.lean,Mathlib/Analysis/Normed/Group/Ultra.lean,Mathlib/Data/ENNReal/Lemmas.lean,Mathlib/Data/Finset/Lattice/Fold.lean,Mathlib/Data/Finset/Max.lean,Mathlib/Data/NNReal/Basic.lean,Mathlib/Order/PartialSups.lean,Mathlib/RingTheory/MvPolynomial/Symmetric/Defs.lean,Mathlib/Topology/ContinuousMap/CompactlySupported.lean,Mathlib/Topology/ContinuousMap/Ordered.lean 11 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody none
8-20190
8 days ago
8-23224
8 days ago
8-23539
8 days
36740 euprunin
author:euprunin
 chore: golf using `grind` The goal of this PR is to decrease the number of times lemmas are called explicitly. Any decrease in compilation time is a welcome side effect, although it is not a primary objective. Trace profiling results (differences <30 ms considered measurement noise): * `AlgebraicGeometry.Scheme.isBasis_affineOpens`: unchanged 🎉 * `SimpleGraph.Walk.takeUntil_eq_take`: 263 ms before, 180 ms after 🎉 * `SimpleGraph.Walk.dropUntil_eq_drop`: 382 ms before, 261 ms after 🎉 * `Int.image_Ico_emod`: unchanged 🎉 * `Equiv.Perm.ofSubtype_swap_eq`: unchanged 🎉 Profiled using `set_option trace.profiler true in`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 7/33 Mathlib/AlgebraicGeometry/AffineScheme.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Decomp.lean,Mathlib/Data/Int/Interval.lean,Mathlib/GroupTheory/Perm/Support.lean 4 7 ['artie2000', 'chenson2018', 'github-actions', 'mathlib-merge-conflicts'] nobody 1
8-15365
8 days ago
14-56314
14 days ago
30-28122
30 days
37722 SabrinaJewson
author:SabrinaJewson
 feat(Order/Cover): intervals equal singletons iff To complement `Set.Icc_eq_singleton_iff`, this introduces: - `Set.Ioc_eq_singleton_iff` - `Set.Ico_eq_singleton_iff` - `Set.Ioi_eq_singleton_iff` - `Set.Iio_eq_singleton_iff` - `Set.Ioo_eq_singleton_iff` Unforunately because of the order of the ands, the last cannot be made self-dual. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order new-contributor 39/0 Mathlib/Order/Cover.lean 1 3 ['github-actions', 'mathlib-merge-conflicts'] nobody none
8-12320
8 days ago
8-12344
8 days ago
9-85495
9 days
37346 euprunin
author:euprunin
 chore: golf using `grind` The goal of this PR is to decrease the number of times lemmas are called explicitly. Any decrease in compilation time is a welcome side effect, although it is not a primary objective. Trace profiling results (differences <30 ms considered measurement noise): * `✅️ SimpleGraph.Walk.IsPath.getVert_injOn`: unchanged 🎉 * `✅️ SimpleGraph.Walk.length_bypass_le`: unchanged 🎉 * `✅️ Rat.floor_intCast_div_natCast`: unchanged 🎉 * `✅️ InnerProductGeometry.norm_eq_of_angle_sub_eq_angle_sub_rev_of_angle_ne_pi`: unchanged 🎉 * `✅️ padicNorm.zero_of_padicNorm_eq_zero`: unchanged 🎉 Profiled using `set_option trace.profiler true in`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 7/45 Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Data/Rat/Floor.lean,Mathlib/Geometry/Euclidean/Triangle.lean,Mathlib/NumberTheory/Padics/PadicNorm.lean 4 8 ['FernandoChu', 'chenson2018', 'euprunin', 'github-actions'] nobody 1
7-71136
7 days ago
18-20552
18 days ago
18-20541
18 days
37698 Qulinecier
author:Qulinecier
 feat: add TendstoInDistribution.continuousOn_comp_prodMk_of_tendstoInMeasure_const This PR adds `TendstoInDistribution.continuousOn_comp_prodMk_of_tendstoInMeasure_const`, a generalization of the existing `TendstoInDistribution.continuous_comp_prodMk_of_tendstoInMeasure_const` (Slutsky's theorem) to functions that are only continuous on a closed subset `s` of the domain, rather than everywhere. This is useful when `g` is only well-behaved on a proper closed subset, such as division (away from zero) or logarithm (on the positive reals), where the previous version requiring global continuity was not applicable. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor 92/0 Mathlib/MeasureTheory/Function/ConvergenceInDistribution.lean 1 2 ['github-actions'] nobody none
7-58938
7 days ago
10-47625
10 days ago
10-47614
10 days
37848 rwst
author:rwst
 feat(RingTheory/PowerSeries/Log): log and exp as inverses --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 87/0 Mathlib/RingTheory/PowerSeries/Log.lean,Mathlib/RingTheory/PowerSeries/Substitution.lean 2 1 ['github-actions'] nobody none
7-45770
7 days ago
7-45852
7 days ago
7-45841
7 days
37291 IvanRenison
author:IvanRenison
 refactor(Combinatorics/SimpleGraph): move `chromaticNumber_le_two_iff_isBipartite` and `chromaticNumber_eq_two_iff` to `Bipartite` file --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics maintainer-merge 10/12 Mathlib/Combinatorics/SimpleGraph/Bipartite.lean,Mathlib/Combinatorics/SimpleGraph/ConcreteColorings.lean 2 2 ['Ruben-VandeVelde', 'github-actions'] nobody 1
7-29647
7 days ago
20-17455
20 days ago
20-17444
20 days
36686 euprunin
author:euprunin
 chore: golf using `grind` The goal of this PR is to decrease the number of times lemmas are called explicitly. Any decrease in compilation time is a welcome side effect, although it is not a primary objective. Trace profiling results (differences <30 ms considered measurement noise): * `List.prod_map_ite`: unchanged 🎉 * `Path.Homotopy.trans_assoc_reparam`: 2938 ms before, 717 ms after 🎉 * `SimplexCategory.δ_comp_δ`: 522 ms before, 316 ms after 🎉 * `Finsupp.ext_iff'`: unchanged 🎉 * `Computation.bind_assoc`: unchanged 🎉 * `Set.piecewise_insert`: unchanged 🎉 * `ZMod.valMinAbs_mem_Ioc`: unchanged 🎉 * `Matrix.det_eq_of_forall_row_eq_smul_add_pred_aux`: 2141 ms before, 2004 ms after 🎉 Profiled using `set_option trace.profiler true in`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 11/51 Mathlib/Algebra/BigOperators/Group/List/Basic.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/Basic.lean,Mathlib/AlgebraicTopology/SimplexCategory/Basic.lean,Mathlib/Data/Finsupp/Defs.lean,Mathlib/Data/Seq/Computation.lean,Mathlib/Data/Set/Piecewise.lean,Mathlib/Data/ZMod/ValMinAbs.lean,Mathlib/LinearAlgebra/Matrix/Determinant/Basic.lean 8 11 ['artie2000', 'chenson2018', 'euprunin', 'github-actions', 'ooovi'] nobody 2
7-23832
7 days ago
32-44828
32 days ago
32-44817
32 days
37697 IvanRenison
author:IvanRenison
 feat(Combinatorics/SimpleGraph/Clique): add theorems about cliques and induced graphs --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 22/0 Mathlib/Combinatorics/SimpleGraph/Clique.lean 1 9 ['Rida-Hamadani', 'SnirBroshi', 'github-actions'] nobody 1
7-23441
7 days ago
10-47886
10 days ago
10-47875
10 days
37682 SabrinaJewson
author:SabrinaJewson
 refactor(Order/OrdContinuous): redefine left and right order continuity to not require preserving ⊥/⊤ `LeftOrdContinuous` currently requires that `f ⊥ = ⊥`, but this means that many functions that are perhaps intuitively left-continuous (like `f x = x + 1` on `ℝ≥0`) are not. In particular, this change means that functions between conditionally complete lattices are `LeftOrdContinuous` iff they are monotone and topologically left continuous (see `MonotoneOn.map_csSup_of_continuousWithinAt` for the reverse direction). If one wants the concept that existed before, one can either accept the `f ⊥ = ⊥` hypothesis separately or, if the function is between complete lattices, use the left side of a `GaloisConnection` (which is equivalent, although I think this is not yet in Mathlib). This removes the definitional equality of the type in favour of a structure. Since most of the time users will be working with the `sSup` versions and not with `IsLUB`, I think this is justified. As a consequence, this removes the definitional equality between `LeftOrdContinuous` and `RightOrdContinuous` of the dual – the latter could be redefined to re-add this, but we do have conversion functions. `LeftOrdContinuous.continuousWithinAt_Iic` is rewritten to accomodate these changes; the superfluous `DenselyOrdered` assumption is also removed. [Zulip thread](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/LeftOrdContinuous.20requires.20f.28.E2.8A.A5.29.20.3D.20.E2.8A.A5/near/582932491) --- - [x] depends on: #37735 - [x] depends on: #37772 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-order 52/38 Mathlib/Order/OrdContinuous.lean,Mathlib/Order/SemiconjSup.lean,Mathlib/Topology/Order/Basic.lean 3 10 ['SabrinaJewson', 'astrainfinita', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vihdzp'] nobody none
7-18577
7 days ago
7-18649
7 days ago
9-15747
9 days
37873 artie2000
author:artie2000
 chore(FieldTheory/Minpoly/Basic): reorganise section variables * Remove duplicate sections This PR does not affect any declarations (including variable explicitness) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 5/18 Mathlib/FieldTheory/Minpoly/Basic.lean 1 1 ['github-actions'] nobody none
7-6336
7 days ago
7-6461
7 days ago
7-6450
7 days
37748 YaelDillies
author:YaelDillies
 chore: syntactically generalise `symm_mk` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 36/38 Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Module/Equiv/Defs.lean,Mathlib/Algebra/Ring/Equiv.lean,Mathlib/Algebra/Star/StarAlgHom.lean,Mathlib/Algebra/Star/StarRingHom.lean,Mathlib/Logic/Equiv/Defs.lean,Mathlib/RingTheory/LaurentSeries.lean,Mathlib/RingTheory/Morita/Matrix.lean,Mathlib/RingTheory/Polynomial/Quotient.lean,Mathlib/RingTheory/TensorProduct/Free.lean 10 8 ['JovanGerb', 'YaelDillies', 'eric-wieser', 'github-actions'] nobody none
6-81219
6 days ago
8-60325
8 days ago
8-65611
8 days
37845 grunweg
author:grunweg
 chore: golf using positivity --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 13/14 Archive/Imo/Imo2008Q3.lean,Archive/OxfordInvariants/Summer2021/Week3P1.lean,Mathlib/Analysis/InnerProductSpace/Positive.lean,Mathlib/Analysis/SpecialFunctions/Log/Deriv.lean,Mathlib/Analysis/SpecialFunctions/Pochhammer.lean,Mathlib/Combinatorics/Additive/AP/Three/Behrend.lean,Mathlib/Combinatorics/SimpleGraph/Regularity/Uniform.lean,Mathlib/Data/ZMod/ValMinAbs.lean,Mathlib/NumberTheory/ClassNumber/Finite.lean 9 3 ['github-actions', 'grunweg', 'leanprover-radar'] nobody none
6-66441
6 days ago
7-47704
7 days ago
7-47693
7 days
37882 tb65536
author:tb65536
 feat(RingTheory): instances for flatness and projectivity of localizations This PR adds instances for flatness and projectivity of localizations. Note that we already have `Module.Flat.localizedModule`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory t-algebra
label:t-algebra$
 12/0 Mathlib/RingTheory/Flat/Stability.lean,Mathlib/RingTheory/LocalProperties/Projective.lean 2 1 ['github-actions'] nobody none
6-51273
6 days ago
6-51273
6 days ago
6-55013
6 days
37884 DanielJHorton
author:DanielJHorton
 feat(LinearAlgebra/TensorProduct/Baisc): add lift_zero theorem for TensorProduct --- Added the following theorem to `TensorProduct` ``` @[simp] theorem lift_zero : lift (0 : M →ₛₗ[σ₁₂] N →ₛₗ[σ₁₂] P₂) = 0 := Eq.symm <| lift.unique fun _ _ => by simp only [LinearMap.zero_apply] ``` new-contributor t-algebra easy
label:t-algebra$
 4/0 Mathlib/LinearAlgebra/TensorProduct/Basic.lean 1 2 ['github-actions'] nobody none
6-50178
6 days ago
6-52455
6 days ago
6-52515
6 days
37890 tb65536
author:tb65536
 feat(RingTheory/Spectrum/Prime/FreeLocus): add variant of `Module.rankAtStalk_eq` for better rewriting This PR adds a variant of `Module.rankAtStalk_eq` for better rewriting. I also generalized `Ideal.Fiber` to `Module`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory t-algebra
label:t-algebra$
 8/2 Mathlib/RingTheory/LocalRing/ResidueField/Fiber.lean,Mathlib/RingTheory/Spectrum/Prime/FreeLocus.lean 2 1 ['github-actions'] nobody none
6-49004
6 days ago
6-49004
6 days ago
6-48994
6 days
37858 tb65536
author:tb65536
 feat(RingTheory/LocalRing/ResidueField/Fiber): `Ideal.Fiber` is a quotient of a localization This PR proves that `Ideal.Fiber` is a quotient of a localization. This is needed for #37130. --- - [ ] depends on: #37380 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory t-algebra
label:t-algebra$
 16/0 Mathlib/RingTheory/LocalRing/ResidueField/Fiber.lean 1 2 ['github-actions', 'mathlib-dependent-issues'] nobody none
6-48822
6 days ago
6-48825
6 days ago
6-49554
6 days
37900 tb65536
author:tb65536
 feat(RingTheory/Localization/FractionRing): add `IsFractionRing.ofAlgEquiv` and `IsFractionRing.ofAlgHom` This PR gives constructors for `IsFractionRing` from an `AlgEquiv` and from an `AlgHom`. The first is just a specialization of `IsLocalization.isLocalization_of_algEquiv`, but the second has a bit more content. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory t-algebra
label:t-algebra$
 9/0 Mathlib/RingTheory/Localization/FractionRing.lean 1 3 ['github-actions', 'tb65536'] nobody none
6-37291
6 days ago
6-37291
6 days ago
6-37281
6 days
35622 SnirBroshi
author:SnirBroshi
 feat(Logic/Function/Basic): `onFun` and `swap` preserve relation properties --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic 141/19 Mathlib/Data/DFinsupp/WellFounded.lean,Mathlib/Logic/Function/Basic.lean,Mathlib/Logic/Function/Defs.lean,Mathlib/Order/Defs/Unbundled.lean,Mathlib/Order/OrderIsoNat.lean,Mathlib/Order/RelClasses.lean,Mathlib/Order/WellFounded.lean,Mathlib/Order/WithBot.lean 8 7 ['SnirBroshi', 'github-actions', 'leanprover-radar', 'vihdzp'] nobody 1
6-10626
6 days ago
42-1049
42 days ago
53-71289
53 days
36856 harahu
author:harahu
 doc(Geometry): tidy bibliography entry Use canonical author names and rename the bib key to match the corrected ASCII transcription of Domínguez. Sources: https://fama.iff.csic.es/personas/margalef/margalef.html ; https://produccioncientifica.ucm.es/investigadores/166066/tesis Normalize the title and move the translation information into a note phrased as 'Translated from the Spanish original'. Sources: https://books.google.com/books/about/Differential_Topology.html?id=gexAr04vRT4C ; https://books.google.com/books/about/Topolog%C3%ADa_diferencial.html?id=0PRMy3ffm4QC Use the conventional publisher form 'North-Holland Publishing Co., Amsterdam' instead of the imported catalog-style field. Sources: https://search.worldcat.org/title/Differential-topology/oclc/25713102 ; https://www.ams.org/tran/2010-362-08/S0002-9947-10-05073-7/ Prepared with assistance from Codex. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry LLM-generated 8/7 Mathlib/Geometry/Manifold/Immersion.lean,docs/references.bib 2 4 ['github-actions', 'grunweg', 'harahu'] nobody none
6-10624
6 days ago
28-26575
28 days ago
28-37785
28 days
36764 euprunin
author:euprunin
 chore: golf using `grind` The goal of this PR is to decrease the number of times lemmas are called explicitly. Any decrease in compilation time is a welcome side effect, although it is not a primary objective. Trace profiling results (differences <30 ms considered measurement noise): * `DirectSum.lequivCongrLeft_lof`: unchanged 🎉 * `AnalyticOnNhd.preimage_mem_codiscreteWithin`: unchanged 🎉 * `mem_permsOfList_of_mem`: unchanged 🎉 * `PNat.mod_le`: unchanged 🎉 * `Computation.map_parallel`: unchanged 🎉 * `Sigma.curry_update`: unchanged 🎉 Profiled using `set_option trace.profiler true in`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 11/41 Mathlib/Algebra/DirectSum/Module.lean,Mathlib/Analysis/Analytic/IsolatedZeros.lean,Mathlib/Data/Fintype/Perm.lean,Mathlib/Data/PNat/Basic.lean,Mathlib/Data/Seq/Parallel.lean,Mathlib/Data/Sigma/Basic.lean 6 13 ['chenson2018', 'euprunin', 'github-actions', 'mathlib-merge-conflicts'] nobody none
5-74132
5 days ago
5-74192
5 days ago
30-45960
30 days
37055 euprunin
author:euprunin
 chore: golf using `grind` The goal of this PR is to decrease the number of times lemmas are called explicitly. Any decrease in compilation time is a welcome side effect, although it is not a primary objective. Trace profiling results (differences <30 ms considered measurement noise): * `OreLocalization.smul'_char`: unchanged 🎉 * `Equiv.Perm.cycleOf_mem_cycleFactorsFinset_iff`: unchanged 🎉 * `StrictMono.ite'`: unchanged 🎉 * `Mathlib.Meta.NormNum.isInt_ediv`: unchanged 🎉 Profiled using `set_option trace.profiler true in`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 10/29 Mathlib/GroupTheory/OreLocalization/Basic.lean,Mathlib/GroupTheory/Perm/Cycle/Factors.lean,Mathlib/Order/Monotone/Basic.lean,Mathlib/Tactic/NormNum/DivMod.lean 4 11 ['chenson2018', 'euprunin', 'github-actions'] nobody none
5-71772
5 days ago
5-71833
5 days ago
23-69406
23 days
36693 euprunin
author:euprunin
 chore: golf using `grind` The goal of this PR is to decrease the number of times lemmas are called explicitly. Any decrease in compilation time is a welcome side effect, although it is not a primary objective. Trace profiling results (differences <30 ms considered measurement noise): * `Equiv.Perm.ofSubtype_swap_eq`: unchanged 🎉 * `Filter.hasBasis_biInf_of_directed'`: unchanged 🎉 Profiled using `set_option trace.profiler true in`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 2/10 Mathlib/GroupTheory/Perm/Support.lean 1 4 ['artie2000', 'chenson2018', 'euprunin', 'github-actions'] nobody 2
5-71736
5 days ago
32-27904
32 days ago
32-27893
32 days
37930 vlad902
author:vlad902
 chore(SimpleGraph): move `cycleGraph` to its own file PR #34797 re-defined `cycleGraph` independent of `circulantGraph`. Now move the definition of `cycleGraph` to its own file so that the definition can be used without importing the algebra hierarchy. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 142/117 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Circulant.lean,Mathlib/Combinatorics/SimpleGraph/Cycle.lean 3 1 ['github-actions'] nobody none
5-54455
5 days ago
5-54510
5 days ago
5-54886
5 days
37584 kennethgoodman
author:kennethgoodman
 feat(Data/Nat/Fib): formalize Lamé's theorem ## Summary Formalize [Lamé's theorem](https://en.wikipedia.org/wiki/Lam%C3%A9%27s_theorem) (1844), the founding result of computational complexity theory. **Lamé's Theorem:** If the Euclidean algorithm on inputs `(a, b)` with `b ≤ a` takes `n + 1` division steps, then `b ≥ fib(n + 1)` and `a ≥ fib(n + 2)`. ### New definitions - `Nat.euclidSteps`: counts the number of division steps in the Euclidean algorithm on natural number inputs. ### New theorems - `Nat.fib_le_of_euclidSteps`: the main Lamé bound — Fibonacci lower bound on inputs given a step count. - `Nat.euclidSteps_le_of_lt_fib`: the contrapositive — step count upper bound given a Fibonacci bound on the smaller input. - `Nat.add_mod_le`: helper lemma that `b + a % b ≤ a` when `b ≤ a` and `0 < b`. ### Proof strategy Induction on `n`, tracking both elements of the pair. The key insight is that each Euclidean step replaces `(a, b)` with `(b, a % b)`, and since `a ≥ b + a % b` (because `a / b ≥ 1`), the Fibonacci recurrence `fib(n+3) = fib(n+2) + fib(n+1)` matches the structure of the algorithm. ### References - Gabriel Lamé, *Note sur la limite du nombre des divisions dans la recherche du plus grand commun diviseur entre deux nombres entiers*, Comptes rendus de l'Académie des sciences, 1844. --- ### AI usage disclosure Per the [Mathlib AI guidelines](https://leanprover-community.github.io/contribute/index.html#use-of-ai): Claude Code (Claude Opus 4.6) was used to assist with writing the Lean 4 proof code, fixing tactic errors, and drafting this PR description. The mathematical proof (induction on step count, tracking both pair elements through the Fibonacci recurrence) was designed by hand and verified on paper before formalization. I have reviewed and understand every line of the resulting Lean code and can explain all proof steps. --- - [x] builds cleanly (`lake build Mathlib.Data.Nat.Fib.Lame`) - [x] no `sorry` - [x] lines ≤ 100 characters, no trailing whitespace - [x] `autoImplicit false` - [x] docstrings on all public declarations new-contributor LLM-generated 121/0 Mathlib.lean,Mathlib/Data/Nat/Basic.lean,Mathlib/Data/Nat/Fib/Basic.lean,Mathlib/Data/Nat/Fib/Lame.lean,docs/1000.yaml 5 24 ['euprunin', 'github-actions', 'kennethgoodman', 'vihdzp', 'wwylele'] nobody none
5-50654
5 days ago
5-53541
5 days ago
13-9495
13 days
37904 maddycrim
author:maddycrim
 feat(LinearAlgebra/PiTensorProduct/PiEquiv): Tensor Product and Direct Product Commute for Finitely Presented Modules From FLT Project. Main definitions: * `tensorPi_equiv_piTensor'` : `M ⊗[R] (Π i, N i) ≃ₗ[R] Π i, (M ⊗[R] N i)` for finite free modules * `tensorPi_equiv_piTensor` : the same but for finitely-presented modules. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 264/0 Mathlib.lean,Mathlib/Algebra/DirectSum/Module.lean,Mathlib/Algebra/Module/FinitePresentation.lean,Mathlib/LinearAlgebra/PiTensorProduct/PiEquiv.lean 4 5 ['github-actions', 'maddycrim', 'themathqueen'] nobody none
5-33645
5 days ago
6-33584
6 days ago
6-35059
6 days
37911 SnirBroshi
author:SnirBroshi
 chore(Order/Closure): generalize from `PartialOrder` to `Preorder` where possible Rearranges declarations to a new `Preorder` section above the existing `PartialOrder` section. --- Only reordered existing decls, and modified `variable` statements. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 41/36 Mathlib/Order/Closure.lean 1 4 ['github-actions', 'leanprover-radar', 'themathqueen'] nobody none
5-31858
5 days ago
6-16976
6 days ago
6-16965
6 days
37700 IvanRenison
author:IvanRenison
 feat(Combinatorics/SimpleGraph/Maps): add `Iso.induceIso` Similar to `induceHom` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 29/0 Mathlib/Combinatorics/SimpleGraph/Maps.lean 1 3 ['github-actions', 'vlad902'] nobody none
5-30685
5 days ago
5-30743
5 days ago
10-43049
10 days
37774 weisbrja
author:weisbrja
 fix: change variables in `bicompl` to `Sort*` and add missing theorem mentioned in `bicompl` docs [#mathlib4 > Why does Mathlib use Type* instead of Sort* in some places?](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Why.20does.20Mathlib.20use.20Type.2A.20instead.20of.20Sort.2A.20in.20some.20places.3F/with/583882342) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-logic 6/1 Mathlib/Logic/Function/Basic.lean 1 7 ['github-actions', 'kbuzzard', 'leanprover-radar', 'weisbrja'] nobody none
5-28037
5 days ago
5-37504
5 days ago
9-23249
9 days
37928 AlexeyMilovanov
author:AlexeyMilovanov
 refactor(Computability.Encoding): unbundle Γ and remove FinEncoding This PR unbundles the alphabet `Γ` from the `Encoding` structure and completely removes `FinEncoding`. `Encoding`: The alphabet `Γ` is now an explicit parameter: `structure Encoding (α : Type u) (Γ : Type v)`. `FinEncoding`: Removed. Finiteness is now handled via standard typeclasses (e.g., `[Fintype Γ] (e : Encoding α Γ)`). Combinators: Functions like `finEncodingPair` are simplified to `encodingPair`, dropping the `fin` prefix and `[Fintype]` requirements where no longer needed. Downstream: Mechanically updated `Mathlib.Computability` and `Mathlib.ModelTheory` to pass the explicit `Γ` and use `[Fintype Γ]` where `FinEncoding` was previously required. new-contributor 30/67 Mathlib/Computability/Encoding.lean,Mathlib/ModelTheory/Encoding.lean 2 5 ['github-actions', 'vihdzp'] nobody none
5-17721
5 days ago
5-63072
5 days ago
5-63061
5 days
37941 NoahW314
author:NoahW314
 feat(RingTheory/MvPolynomial/Homogeneous): add `homogeneousComponent` lemma Add a lemma about the `support` of the `(weighted)HomogeneousComponent` of a `MvPolynomial`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 10/0 Mathlib/RingTheory/MvPolynomial/Homogeneous.lean,Mathlib/RingTheory/MvPolynomial/WeightedHomogeneous.lean 2 1 ['github-actions'] nobody none
5-6608
5 days ago
5-6680
5 days ago
5-6669
5 days
37886 LLaurance
author:LLaurance
 chore(Algebra): shorten proofs by removing lemmas used in simp --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 6/10 Mathlib/Algebra/Free.lean,Mathlib/Algebra/FreeAlgebra.lean 2 3 ['LLaurance', 'github-actions', 'themathqueen'] nobody none
4-77997
4 days ago
6-47696
6 days ago
6-47685
6 days
37950 martinwintermath
author:martinwintermath
 feat(Algebra/Order/Hom): add lemmas about order and `MonoidHomClass` Add * `map_inv_le_map_inv_iff_map_le_map` (and additive version) proving `f x⁻¹ ≤ g x⁻¹ ↔ g x ≤ f x` in a setting where inverses only exists in the domain of `f` and `g`. * `MonoidHom.ext_iff_le` (and additive version) proving `f = g ↔ (∀ x, f x ≤ g x)`, i.e. an ordered analogue of function extensionality. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 24/0 Mathlib/Algebra/Order/Hom/Monoid.lean 1 5 ['SnirBroshi', 'github-actions', 'themathqueen'] nobody none
4-47891
4 days ago
4-49558
4 days ago
4-52329
4 days
37955 artie2000
author:artie2000
 feat(Algebra/Polynomial): lemmas about `modByMonic` * Add various small lemmas about `Polynomial.modByMonic` * Remove unneccesary commutativity assumption on `Polynomial.aeval_eq_zero_of_dvd_aeval_eq_zero` by proving `Polynomial.aeval_dvd` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 20/6 Mathlib/Algebra/Polynomial/AlgebraMap.lean,Mathlib/Algebra/Polynomial/Div.lean,Mathlib/Algebra/Polynomial/RingDivision.lean,Mathlib/FieldTheory/Minpoly/Basic.lean,Mathlib/RingTheory/Polynomial/IsIntegral.lean 5 1 ['github-actions'] nobody none
4-44904
4 days ago
4-44964
4 days ago
4-45801
4 days
37952 JovanGerb
author:JovanGerb
 feat(FastInstance): suggest using `inferInstance` when possible It is easy to accidentally write `fast_instance%` when there already exists an instance. This PR adds a linter against that. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 35/39 Mathlib/Algebra/Field/Subfield/Defs.lean,Mathlib/Algebra/Group/Subgroup/Defs.lean,Mathlib/Algebra/Group/Submonoid/Defs.lean,Mathlib/Algebra/Module/Submodule/Defs.lean,Mathlib/RingTheory/NonUnitalSubring/Defs.lean,Mathlib/Tactic/FastInstance.lean,MathlibTest/fast_instance.lean 7 1 ['github-actions'] nobody none
4-38606
4 days ago
4-38665
4 days ago
4-43349
4 days
37720 cjrl
author:cjrl
 feat(Data/Fintype/Card): existsUnique_notMem_image_of_injective_of_card_succ This pull requests adds a small theorem `existsUnique_notMem_image_of_injective_of_card_succ` to `Mathlib/Data/Fintype/Card` that says given an injective map f : α → β such that β has cardinality one more than α, there exists a unique element of β not in the image of f. This can be viewed as going in the opposite direction of `card_lt_of_injective_of_notMem`. This little fact is needed for our Latin Square PR #36698. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor t-set-theory 15/0 Mathlib/Data/Fintype/Card.lean 1 6 ['IvanRenison', 'cjrl', 'github-actions'] nobody none
4-31025
4 days ago
4-31083
4 days ago
9-84923
9 days
37190 cjrl
author:cjrl
 feat(Combinatorics): Set-Valued Pigeonhole Principle This PR contributes two theorems to combinatorics: - `exists_lt_card_cover_of_card_biUnion_lt_card` is a set-valued version of the pigeonhole principle. - `sum_card_eq_sum_card_cover_biUnion` is a set theoretic corollary of a double counting result proved for bipartite graphs (`Finset.sum_card_bipartiteAbove_eq_sum_card_bipartiteBelow`). This was needed to prove the above pigeonhole principle. The motivation for these results is our Latin Square PR #36698. These results were proved in less general terms in that PR, but are independent of Latin Square considerations and so we have generalized and moved them into more relevant files. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics 38/0 Mathlib/Combinatorics/Enumerative/DoubleCounting.lean,Mathlib/Combinatorics/Pigeonhole.lean 2 16 ['IvanRenison', 'cjrl', 'ghseeli', 'github-actions', 'j-loreaux', 'vlad902'] nobody none
4-30217
4 days ago
4-30268
4 days ago
20-1056
20 days
37956 artie2000
author:artie2000
 feat(Algebra/Polynomial): lemmas about polynomial degree * Add various small lemmas about polynomial degree --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 29/2 Mathlib/Algebra/Polynomial/Degree/Defs.lean,Mathlib/Algebra/Polynomial/Degree/Operations.lean,Mathlib/Algebra/Polynomial/FieldDivision.lean,Mathlib/Algebra/Polynomial/Monic.lean,MathlibTest/hintAll.lean 5 4 ['github-actions', 'vihdzp'] nobody none
4-19542
4 days ago
4-37582
4 days ago
4-39372
4 days
37960 DanielJHorton
author:DanielJHorton
 doc: typo in docstring for alternatingMapToDual t-algebra easy new-contributor
label:t-algebra$
 1/1 Mathlib/LinearAlgebra/ExteriorPower/Pairing.lean 1 2 ['github-actions'] nobody none
4-16854
4 days ago
4-33874
4 days ago
4-33863
4 days
37967 vihdzp
author:vihdzp
 chore: add `simp` to `aleph0_lt_univ`, etc Used in the CGT repo. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory easy 5/1 Mathlib/SetTheory/Ordinal/Univ.lean 1 2 ['github-actions'] nobody none
4-11473
4 days ago
4-11450
4 days ago
4-11627
4 days
37965 vihdzp
author:vihdzp
 feat: an infinite type has a "pathological relation" In the sense that `{y | ¬ r x y}` and `{x | r x y}` are both of cardinal `< #α`. --- Truthfully I'm not convinced that we need to have this `exists_pathological_rel` theorem. This property is satisfied by any well-ordering of minimal order type, and the theorems `mk_Iio_lt` and `mk_Iic_lt` already prove as much. Though I guess it can still be useful if the type already has an existing `<` relation. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory 33/19 Counterexamples/Phillips.lean,Mathlib/SetTheory/Cardinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/Basic.lean 3 10 ['eric-wieser', 'github-actions', 'vihdzp'] nobody none
4-685
4 days ago
4-2598
4 days ago
4-7778
4 days
37625 slavanaprienko
author:slavanaprienko
 feat(LinearAlgebra/Matrix/Charpoly): general coefficient formula as sum of principal minors This PR adds a general formula for the coefficients of `det(1 + X • M)` as sums of principal minors, generalizing the existing `coeff_det_one_add_X_smul_one` (k=1, trace) and `det_eq_sign_charpoly_coeff` (k=n, determinant). It also derives the corresponding formula for the coefficients of the characteristic polynomial via `charpolyRev`. New results: - `det_piecewise_one_eq_submatrix_det`: relates piecewise-with-identity to principal submatrix determinants - `coeff_det_one_add_X_smul_eq_sum_minors`: the k-th coefficient of `det(1 + X • M)` equals the sum of k×k principal minors - `charpoly_coeff_eq_sum_minors`: coefficients of the characteristic polynomial as signed sums of principal minors --- t-algebra new-contributor
label:t-algebra$
 105/1 Mathlib/LinearAlgebra/Matrix/Charpoly/Coeff.lean 1 24 ['eric-wieser', 'github-actions', 'slavanaprienko', 'wwylele'] nobody none
4-487
4 days ago
11-84916
11 days ago
13-13993
13 days
37973 vihdzp
author:vihdzp
 chore(Order/Interval/Set/InitialSeg): clean up file We do various small golfs, remove unneeded namespaces, and deprecate some confusing names. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 28/37 Mathlib/Order/Interval/Set/InitialSeg.lean 1 1 ['github-actions'] nobody none
3-83795
3 days ago
3-84304
3 days ago
3-84293
3 days
37995 grunweg
author:grunweg
 doc(1000.yaml): note Koebe 1/4 and Sard's theorem --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) documentation easy 7/2 docs/1000.yaml 1 1 ['github-actions'] nobody none
3-58301
3 days ago
3-58365
3 days ago
3-58942
3 days
35402 samueloettl
author:samueloettl
 feat(Dynamics/BirkhoffSum): birkhoffAverage const --- I think this is useful and one of these should be a simp lemma. I'm not really sure if I got the naming of the theorems correct. When generalizing to the assumption (n : R) ≠ 0 instead of the special case CharZero R with n ≠ 0 I had to use "open Classical in". I'm a bit unfamiliar with that part so please check if this makes sense. See also https://github.com/leanprover-community/mathlib4/pull/35307#discussion_r2823586252 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-dynamics new-contributor 14/0 Mathlib/Dynamics/BirkhoffSum/Average.lean 1 10 ['Maldooor', 'github-actions', 'samueloettl'] nobody none
3-55914
3 days ago
3-55972
3 days ago
59-49340
59 days
37814 sglasman
author:sglasman
 feat: Equivalence between HopfAlgCat R and Hopf (ModuleCat R) This PR resolves a TODO by demonstrating an equivalence of categories between two models of the category of Hopf algebras over a commutative ring R, that of Hopf objects in the module category of R and that of types with a `HopfAlgebra R` instance. --- AI declaration: I consulted with Claude on proof strategies. The proofs were ultimately written by me. new-contributor large-import 214/4 Mathlib/CategoryTheory/Monoidal/Hopf_.lean,Mathlib/RingTheory/HopfAlgebra/Basic.lean 2 4 ['github-actions', 'robin-carlier', 'sglasman'] nobody none
3-49777
3 days ago
8-25706
8 days ago
8-25695
8 days
34675 YaelDillies
author:YaelDillies
 feat: comultiplication as a bialgebra hom From Toric --- - [x] depends on: #32245 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory toric 71/12 Mathlib/RingTheory/Bialgebra/TensorProduct.lean,Mathlib/RingTheory/Coalgebra/TensorProduct.lean 2 6 ['YaelDillies', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'riccardobrasca'] nobody none
3-48664
3 days ago
4-72144
4 days ago
4-72134
4 days
37832 YaelDillies
author:YaelDillies
 chore(Algebra/Order/GroupWithZero): flatten `Unbundled` folder The algebraic order classes are unbundled now. --- More thought is needed to do the same for `Algebra.Order.Monoid` since filenames conflict. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed t-algebra t-order
label:t-algebra$
 20/20 Mathlib.lean,Mathlib/Algebra/Order/BigOperators/GroupWithZero/Finset.lean,Mathlib/Algebra/Order/BigOperators/GroupWithZero/List.lean,Mathlib/Algebra/Order/Field/Basic.lean,Mathlib/Algebra/Order/Field/Pointwise.lean,Mathlib/Algebra/Order/GroupWithZero/Basic.lean,Mathlib/Algebra/Order/GroupWithZero/Bounds.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/GroupWithZero/Defs.lean,Mathlib/Algebra/Order/GroupWithZero/Finset.lean,Mathlib/Algebra/Order/GroupWithZero/OrderIso.lean,Mathlib/Algebra/Order/GroupWithZero/Submonoid.lean,Mathlib/Algebra/Order/GroupWithZero/WithZero.lean,Mathlib/Algebra/Order/Nonneg/Basic.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Order/Ring/Unbundled/Basic.lean,Mathlib/Order/Filter/IsBounded.lean,Mathlib/RingTheory/DedekindDomain/Ideal/Lemmas.lean,Mathlib/Tactic/FieldSimp/Lemmas.lean 19 1 ['github-actions'] nobody none
3-47602
3 days ago
7-61981
7 days ago
7-64348
7 days
37931 Vierkantor
author:Vierkantor
 chore(Tactic): make the (deprecated) `replace` syntax a `@[tactic_alt]` This PR replaces the tactic docstring for Mathlib's version of `replace` with a `@[tactic_alt]` attribute + `tactic_extension`. Also update the module docs which did not get updated when `replace` got upstreamed to core Lean. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) documentation t-meta 7/31 Mathlib/Tactic/Replace.lean 1 1 ['github-actions'] nobody none
3-46990
3 days ago
3-47050
3 days ago
3-47761
3 days
38005 robin-carlier
author:robin-carlier
 chore(Algebra): remove simps projections for structures of bundled objects I noticed that currently, adding a `@[simps]` tag to a `ModuleCat`-valued definition will generate projections for the `isModule` fields. These projections are removed. Same in `BialgCat` and `HopfAlgCat`. --- I did not look very hard for all cases of this, but those three should be a starter. Renaming `carrier` to `coe` will break a few things, so I opted for keeping it like this for now, feel free to disagree, but this will make the diff bigger. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 4/0 Mathlib/Algebra/Category/BialgCat/Basic.lean,Mathlib/Algebra/Category/HopfAlgCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Semi.lean 4 1 ['github-actions'] nobody none
3-39806
3 days ago
3-39863
3 days ago
3-42997
3 days
37796 JadAbouHawili
author:JadAbouHawili
 feat(Data/Set): add mem_singleton lemma --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor easy 9/3 Mathlib/Data/Finset/Card.lean,Mathlib/Data/Finset/Insert.lean,Mathlib/Data/Set/Insert.lean 3 5 ['JadAbouHawili', 'github-actions', 'wwylele'] nobody none
3-36205
3 days ago
5-27398
5 days ago
8-46975
8 days
36758 LarsenClose
author:LarsenClose
 feat(Algebra/Category/ModuleCat): add locally finitely presentable instance Prove that `ModuleCat R` is locally finitely presentable for any commutative ring `R`. The free rank-1 module is a small strong generator of `ℵ₀`-presentable objects (Gabriel-Ulmer, Adamek-Rosicky Theorem 1.11). This is the first `IsLocallyFinitelyPresentable` instance for an algebraic category in Mathlib. Opens the path to LFP instances for other algebraic categories (groups, rings, etc.) via the same generator pattern. Companion to #36104. ### AI disclosure Developed with assistance from Claude (Anthropic). AI was used for proof exploration, convention checking, and PR preparation. All mathematical content and proof strategy reviewed and understood by the author. new-contributor t-algebra LLM-generated
label:t-algebra$
 163/0 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/ForgetCorepresentable.lean,Mathlib/Algebra/Category/ModuleCat/Presentable.lean 3 21 ['LarsenClose', 'eric-wieser', 'github-actions', 'joelriou', 'robin-carlier'] nobody none
3-31255
3 days ago
3-31255
3 days ago
5-81317
5 days
38021 IvanRenison
author:IvanRenison
 feat(Data/Int/ModEq): add theorem `modEq_two_abs` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 4/0 Mathlib/Data/Int/ModEq.lean 1 1 ['github-actions'] nobody none
3-19911
3 days ago
3-19977
3 days ago
3-19966
3 days
37906 AntoineChambert-Loir
author:AntoineChambert-Loir
 refactor(Data/Nat/Choose/Multinomial): last minute modification before merge Addresses the final remark by @b-mehta before #35830 was merged --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data easy 4/4 Mathlib/Data/List/ToFinsupp.lean,Mathlib/Data/Nat/Choose/Multinomial.lean 2 3 ['github-actions', 'mathlib-merge-conflicts', 'themathqueen'] nobody none
3-19402
3 days ago
3-19426
3 days ago
6-31752
6 days
36419 AntoineChambert-Loir
author:AntoineChambert-Loir
 feat(RingTheory/DividedPowerAlgebra/Init): add a computation lemma Add a lemma `DividedPowerAlgebra.pow_dp`. Co-authored with: @mariainesdff --- - [x] depends on: #35804 - [x] depends on: #35830 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 6/0 Mathlib/RingTheory/DividedPowerAlgebra/Init.lean 1 5 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody none
3-19359
3 days ago
3-19381
3 days ago
6-34867
6 days
36507 BryceT233
author:BryceT233
 feat(RingTheory/MvPowerSeries): various equivalences for `MvPowerSeries` This PR adds a number of equivalences related to power series rings and is patterned after `Mathlib/Algebra/MvPolynomial/Equiv.lean`. To be specific, it adds: * `MvPowerSeries.isEmptyEquiv` : The isomorphism between multivariable power series in no variables and the ground ring. * `MvPowerSeries.uniqueEquiv` : The isomorphism between multivariable power series in a single variable and power series over the ground ring. * `MvPowerSeries.mapEquiv`, `MvPowerSeries.mapAlgEquiv` : The isomorhism between multivariable power series induced by an isomorphism between the coefficient rings. * `MvPowerSeries.sumAlgEquiv` : The isomorphism between multivariable power series in a sum of two types, and multivariable power series in one of the types, with coefficients in multivariable power series in the other type. * `MvPowerSeries.commAlgEquiv` : The isomorphism between multivariable power series in variables `σ` of multivariable power series in variables `τ` and multivariable power series in variables `τ` of multivariable power series in variables `σ`. * `MvPowerSeries.optionEquivLeft` : The isomorphism between multivariable power series in `Option σ` and power series with coefficients in `MvPowerSeries σ R`. * `MvPowerSeries.optionEquivRight` : The isomorphism between multivariable power series in `Option σ` and multivariable power series in `σ` with coefficients in `PowerSeries R` * `MvPowerSeries.finSuccEquiv` : The isomorphism between multivariable power series in `Fin (n + 1)` and power series over multivariable power series in `Fin n`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #35329 - [x] depends on: #36506 t-ring-theory 600/4 Mathlib/RingTheory/MvPowerSeries/Basic.lean,Mathlib/RingTheory/MvPowerSeries/Equiv.lean 2 26 ['AntoineChambert-Loir', 'BryceT233', 'Thmoas-Guan', 'WenrongZou', 'YaelDillies', 'eric-wieser', 'github-actions', 'mathlib-dependent-issues'] nobody none
3-17885
3 days ago
3-18503
3 days ago
9-64975
9 days
37835 YaelDillies
author:YaelDillies
 doc(Algebra/Order): update mentions of `OrderedSemiring` and friends As of #20676, it was replaced by `IsOrderedRing`. Not all docs were straightforward to update. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-order
label:t-algebra$
 123/280 Counterexamples/HomogeneousPrimeNotPrime.lean,Counterexamples/OrderedCancelAddCommMonoidWithBounds.lean,Mathlib/Algebra/Group/Subgroup/Order.lean,Mathlib/Algebra/Group/ULift.lean,Mathlib/Algebra/Order/AddTorsor.lean,Mathlib/Algebra/Order/Floor/Defs.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Algebra/Order/Floor/Semiring.lean,Mathlib/Algebra/Order/Group/Cone.lean,Mathlib/Algebra/Order/Group/Cyclic.lean,Mathlib/Algebra/Order/GroupWithZero/Unbundled/Defs.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Order/Interval/Set/Monoid.lean,Mathlib/Algebra/Order/Monoid/Canonical/Defs.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Defs.lean,Mathlib/Algebra/Order/Monoid/Unbundled/ExistsOfLE.lean,Mathlib/Algebra/Order/Positive/Ring.lean,Mathlib/Algebra/Order/Ring/Basic.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Order/Ring/Unbundled/Basic.lean,Mathlib/Algebra/Order/Star/Basic.lean,Mathlib/Algebra/Order/Sub/WithTop.lean,Mathlib/Algebra/Order/ToIntervalMod.lean,Mathlib/Algebra/Order/WithTop/Untop0.lean,Mathlib/Combinatorics/Pigeonhole.lean,Mathlib/Data/Finsupp/Weight.lean,Mathlib/Data/NNReal/Defs.lean,Mathlib/Data/Nat/Cast/Order/Basic.lean,Mathlib/Data/Nat/Cast/Order/Ring.lean,Mathlib/MeasureTheory/Function/LpOrder.lean,Mathlib/MeasureTheory/Measure/Typeclasses/Finite.lean,Mathlib/Order/Filter/Germ/OrderedMonoid.lean,Mathlib/RingTheory/GradedAlgebra/Radical.lean,Mathlib/RingTheory/HahnSeries/PowerSeries.lean,Mathlib/RingTheory/HahnSeries/Valuation.lean,Mathlib/RingTheory/MvPolynomial/WeightedHomogeneous.lean,Mathlib/Tactic/NormNum/Ineq.lean 37 8 ['NoahW314', 'SnirBroshi', 'github-actions'] nobody none
3-15570
3 days ago
3-47345
3 days ago
6-82103
6 days
33928 jsm28
author:jsm28
 feat(Combinatorics/Tiling/TileSet): indexed families of tiles Define the type `TileSet` for indexed families of tiles (in a discrete context), and some associated definitions (including `symmetryGroup`) and API lemmas. `TileSet` can be used for tilings of the whole space; for tilings of part of the space; for patches of tiles (extracted from a tiling by considering tiles meeting some set of points, or considered on their own without extracting from a tiling); for multiple tilings (covering the space more than once). In particular, the fact that people study multiple tilings provides a clear justification for using indexed families rather than sets of tiles, and basic definitions and API lemmas generally work for all these different uses of `TileSet` (sometimes with weak constraints such as tiles being finite, nonempty and only having finitely many tiles meeting any point of the space). Definitions for saying e.g. "this `TileSet` is a tiling of the whole space" are to be included in subsequent files in subsequent PRs. From AperiodicMonotilesLean. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 460/0 Mathlib.lean,Mathlib/Combinatorics/Tiling/TileSet.lean 2 23 ['Parcly-Taxel', 'b-mehta', 'eric-wieser', 'github-actions', 'jsm28', 'vihdzp'] nobody 1
3-10625
3 days ago
93-27731
93 days ago
93-27720
93 days
34092 staroperator
author:staroperator
 feat(SetTheory/ZFC): properties of `ZFSet.omega` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory 77/10 Mathlib/SetTheory/ZFC/Basic.lean,Mathlib/SetTheory/ZFC/Ordinal.lean,Mathlib/SetTheory/ZFC/PSet.lean 3 25 ['Komyyy', 'github-actions', 'mathlib4-merge-conflict-bot', 'staroperator', 'vihdzp'] nobody 1
3-10624
3 days ago
77-32534
77 days ago
88-77938
88 days
36970 astrainfinita
author:astrainfinita
 chore: redefine `Nat.div2` `Nat.bodd` --- This PR continues the work from #13649. Original PR: https://github.com/leanprover-community/mathlib4/pull/13649 t-data 54/72 Mathlib/Computability/Primrec/Basic.lean,Mathlib/Data/Int/Bitwise.lean,Mathlib/Data/Nat/Bits.lean,Mathlib/Data/Nat/Bitwise.lean,Mathlib/Logic/Denumerable.lean,Mathlib/Logic/Encodable/Basic.lean,Mathlib/Logic/Equiv/Nat.lean 7 2 ['astrainfinita', 'github-actions'] nobody none
3-10617
3 days ago
25-86066
25 days ago
26-5044
26 days
37816 marcelolynch
author:marcelolynch
 fix: Fail lake exe cache on unexpected arguments, add --help Currently, `lake exe cache` just ignores unexpected arguments. This leads to unexpected situations like `lake exe cache get --help` being equivalent to `lake exe cache get`. Let's be louder and complain if anything is unexpected. CI 24/3 Cache/Main.lean 1 2 ['adomani', 'github-actions'] nobody none
3-5238
3 days ago
3-5292
3 days ago
3-12796
3 days

Needs triage: assigned PRs on the review queue

Number Author Title Description Labels +/- Modified files (first 100) 📝 💬 All users who commented or reviewed Assignee(s) Approval(s) Updated Last status change total time in review
31892 jsm28
author:jsm28
 feat(Geometry/Euclidean/Sphere/PolePolar): poles and polars Define poles and polars for spheres in Euclidean affine spaces, and set up some basic API, including in particular La Hire's theorem (`p₁` lies on the polar of `p₂` if and only if `p₂` lies on the polar of `p₁`). Poles and polars are actually meaningful for any quadric in a projective space over any field, but I think it's reasonable to set up this theory for spheres in the Euclidean context and potentially link it in future to more general projective geometry. --- - [ ] depends on: #31891 - [ ] depends on: #32296 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-euclidean-geometry 159/0 Mathlib.lean,Mathlib/Geometry/Euclidean/Sphere/PolePolar.lean 2 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] JovanGerb
assignee:JovanGerb
 none
20-10614
20 days ago
20-34566
20 days ago
20-35315
20 days
32294 jsm28
author:jsm28
 feat(Geometry/Euclidean/Angle/Incenter): distance from second intersection with circumcircle Add the following lemma: given a triangle ABC, suppose an angle bisector from A through the incenter or excenter I meets the circumcircle again at X (including the case of an external bisector at A tangent to the circle, in which case X = A). Then XB = XI (= XC, by applying this lemma again). This is a standard configuration: https://en.wikipedia.org/wiki/Incenter%E2%80%93excenter_lemma --- - [ ] depends on: #30981 - [ ] depends on: #30982 - [ ] depends on: #32019 - [ ] depends on: #32021 - [ ] depends on: #32023 - [ ] depends on: #32270 - [ ] depends on: #32290 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-euclidean-geometry 189/0 Mathlib/Geometry/Euclidean/Angle/Incenter.lean 1 5 ['github-actions', 'jsm28', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'peakpoint'] JovanGerb
assignee:JovanGerb
 none
20-10613
20 days ago
20-34580
20 days ago
20-35359
20 days
37084 SnirBroshi
author:SnirBroshi
 feat(Order/PropInstances): relations and `Subsingleton` `r = ⊤ ↔ Refl r` and `r = ⊥ ↔ Irrefl r` given `Subsingleton` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 7/1 Mathlib/Order/PropInstances.lean 1 1 ['github-actions'] bryangingechen
assignee:bryangingechen
 none
19-10382
19 days ago
23-67053
23 days ago
23-67042
23 days
34952 joneugster
author:joneugster
 feat(scripts/autolabel): use `Cli` and integrate `curl` call into `autolabel` - use `Cli` for `lake exe autolabel` - add arguments `--pr xxx --gh` and `--pr xxx --curl ` to chose between different interaction methods with github - add `--force` to skip the check whether labels are already present. (note: the current `curl` setup doesn't perform this step and neither does the refactor, so I added a `Todo` to remember this. ) - make CI-workflow simpler and more robust by removing current stdout-parsing of the debug-messages which `autolabel` emits. ### Testing Make some local changes and commit them. Ensure your local `origin/master` is in sync with `upstream/master` if you are on a fork. - `lake exe autolabel`: prints the labels which would be applicable - `lake exe autolabel --pr 34952 --gh --force` adds these labels to this PR using `gh`. - `lake exe autolabel --pr 34952 --gh` adds these labels to this PR using `gh` if no topic labels are present. - `lake exe autolabel --pr 34952 --curl ` adds these labels to this PR using `curl`. This requires a github access token for authentication --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI 87/73 .github/workflows/add_label_from_diff.yaml,scripts/autolabel.lean 2 4 ['github-actions', 'mathlib-merge-conflicts'] adomani
assignee:adomani
 none
18-57343
18 days ago
18-57626
18 days ago
51-12555
51 days
32282 jsm28
author:jsm28
 feat(Geometry/Euclidean/Angle/Incenter): unoriented angle bisection Add lemmas giving unoriented angles involving the incenter and excenters of a triangle as expressions involving dividing angles of the triangle by 2, deduced from oriented bisection lemmas. --- - [ ] depends on: #30981 - [ ] depends on: #30982 - [ ] depends on: #31205 - [ ] depends on: #32019 - [ ] depends on: #32021 - [ ] depends on: #32259 - [ ] depends on: #32260 - [ ] depends on: #32270 - [ ] depends on: #32273 - [ ] depends on: #32278 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-euclidean-geometry 98/0 Mathlib/Geometry/Euclidean/Angle/Incenter.lean 1 8 ['github-actions', 'jsm28', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'wwylele'] JovanGerb
assignee:JovanGerb
 1
18-27046
18 days ago
20-34577
20 days ago
20-35302
20 days
35069 A-M-Berns
author:A-M-Berns
 feat(Geometry/Polygon): simple polygons and boundary map This PR introduces Simple polygons with the predicate `IsSimple`, which captures the idea of a non-self-intersecting boundary, in the file Simple.lean. In the file Boundary.lean, a boundary map from `AddCircle n` is defined. I prove that the range of this map is the boundary and that this map is injective if and only if the polygon is simple. I kept Boundary.lean and Simple.lean separate because future results will include stuff just about the boundary map independent of simplicity (e.g. that it is continuous in the appropriate setting) and stuff just about simple polygons independent of the boundary map (e.g. that for n = 3, IsSimple iff HasNondegenerateVertices.) I used Claude Code to help generate some of the proof material, but I golfed and edited all AI contribution. - [x] depends on: #34598 --- new-contributor t-euclidean-geometry LLM-generated 360/0 Mathlib.lean,Mathlib/Geometry/Polygon/Boundary.lean,Mathlib/Geometry/Polygon/Simple.lean,Mathlib/Logic/Equiv/Fin/Rotate.lean 4 30 ['A-M-Berns', 'eric-wieser', 'github-actions', 'joneugster', 'jsm28', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vihdzp', 'wwylele'] jsm28
assignee:jsm28
 none
18-26916
18 days ago
50-36479
50 days ago
52-70754
52 days
36239 plp127
author:plp127
 feat(FieldTheory/KrullTopology): define uniform group structure on galois group Endow the galois group of a field extension `Gal(L/K)` with the structure of a uniform group. Use this to prove some properties of the galois group earlier, for example, that the galois group is compact is immediate, and in more generality than the version proved in `FieldTheory/Galois/Profinite`. Deprecate some material which used to be used to define the krull topology, but is now unused since the krull topology comes out of the uniform structure. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 271/177 Mathlib/FieldTheory/Galois/Infinite.lean,Mathlib/FieldTheory/Galois/Profinite.lean,Mathlib/FieldTheory/KrullTopology.lean,Mathlib/NumberTheory/Cyclotomic/CyclotomicCharacter.lean 4 17 ['github-actions', 'mathlib-merge-conflicts', 'plp127', 'vihdzp'] joelriou
assignee:joelriou
 none
17-10466
17 days ago
19-1318
19 days ago
19-1307
19 days
37175 tb65536
author:tb65536
 chore(GroupTheory/Nilpotent): move declarations into namespace This PR moves the declarations of `GroupTheory/Nilpotent` from the root namespace to either the `Subgroup` namespace or the `Group` namespace. I also switched over to the commutator element notation in a few places. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-group-theory
label:t-algebra$
 194/34 Mathlib/GroupTheory/Commutator/Basic.lean,Mathlib/GroupTheory/Frattini.lean,Mathlib/GroupTheory/Nilpotent.lean,Mathlib/GroupTheory/SpecificGroups/ZGroup.lean 4 1 ['github-actions'] mattrobball
assignee:mattrobball
 none
17-10457
17 days ago
22-30179
22 days ago
22-30170
22 days
37317 vihdzp
author:vihdzp
 feat: a topology with a basis of clopens is completely regular --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 11/0 Mathlib/Topology/Separation/CompletelyRegular.lean 1 4 ['felixpernegger', 'github-actions', 'themathqueen', 'vihdzp'] urkud
assignee:urkud
 2
16-51641
16 days ago
19-45103
19 days ago
19-45092
19 days
35316 mkaratarakis
author:mkaratarakis
 feat: lemmas for the analytic part of the proof of the Gelfond–Schneider theorem (Part 4/5) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory new-contributor 85/0 Mathlib.lean,Mathlib/NumberTheory/Transcendental/AnalyticPart.lean 2 12 ['MichaelStollBayreuth', 'SnirBroshi', 'github-actions', 'mathlib-dependent-issues', 'mkaratarakis'] MichaelStollBayreuth
assignee:MichaelStollBayreuth
 none
16-51013
16 days ago
16-51068
16 days ago
20-69514
20 days
37374 NoneMore
author:NoneMore
 feat(Topology/DerivedSet): add relative derived set lemmas Add `relDerivedSet`, `relDerivedSet_subset`, and `IsClosed.relDerivedSet_eq`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology new-contributor 17/0 Mathlib/Topology/DerivedSet.lean 1 6 ['NoneMore', 'github-actions', 'plp127', 'vihdzp'] PatrickMassot
assignee:PatrickMassot
 none
16-42919
16 days ago
16-45073
16 days ago
17-12076
17 days
36788 hommmmm
author:hommmmm
 feat(RingTheory): height of span of a prime element is one ## Summary - Add `Ideal.height_span_singleton_eq_one_of_prime`: in a Noetherian integral domain, the ideal generated by a prime element has height one. ## Notes The new theorem follows directly from `height_le_one_of_isPrincipal_of_mem_minimalPrimes` (upper bound) and the fact that `span {p} ≠ ⊥` for `p` prime (lower bound). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory new-contributor 12/1 Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean 1 5 ['Multramate', 'github-actions', 'hommmmm'] mattrobball
assignee:mattrobball
 1
16-21010
16 days ago
16-22030
16 days ago
30-2854
30 days
36781 hommmmm
author:hommmmm
 feat(RingTheory/UniqueFactorizationDomain): UFD iff height one primes are principal We prove that a Noetherian integral domain is a UFD if and only if every prime ideal of height one is principal (`UniqueFactorizationMonoid.iff_height_one_prime_principal`). ## New declarations * `UniqueFactorizationMonoid.exists_height_one_le_of_finite_height`: given a prime of finite height ≥ 1, there exists a height one prime contained in it. * `UniqueFactorizationMonoid.ne_bot_of_height_one`: an ideal of height one is nonzero. * `UniqueFactorizationMonoid.height_ge_one_of_prime_ne_bot`: the height of a nonzero prime ideal in a domain is at least one. * `UniqueFactorizationMonoid.height_one_prime_principal`: in a UFD, every height one prime is principal. * `UniqueFactorizationMonoid.of_height_one_prime_principal`: every height one prime being principal implies UFD (Noetherian case). * `UniqueFactorizationMonoid.iff_height_one_prime_principal`: the full iff statement. ## References See https://stacks.math.columbia.edu/tag/0AFT ## AI Disclosure This code is written without AI, then uses Claude Code with cameronfreer's [Lean4-skills](https://github.com/cameronfreer/lean4-skills) (specifically, the `review`, `refactor`, and `golf` workflow) for style changes, refactoring and golfing. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory new-contributor large-import 102/1 Mathlib/RingTheory/UniqueFactorizationDomain/Kaplansky.lean 1 8 ['Thmoas-Guan', 'chrisflav', 'github-actions', 'hommmmm', 'tb65536'] mattrobball
assignee:mattrobball
 none
16-10151
16 days ago
25-28392
25 days ago
29-63988
29 days
35683 gasparattila
author:gasparattila
 fix(Tactic/FunProp): detect `Continuous.subtype_mk` as compositional This PR changes `fun_prop` to detect some theorems involving dependent types, such as `Continous.subtype_mk` to be in compositional form. This lets `fun_prop` solve goals such as `Continuous fun x => (⟨x, trivial⟩ : {x : ℝ // True})`. --- These theorems become compositional: `Continuous.subtype_mk`, `Topology.IsEmbedding.inclusion`, `Topology.IsOpenEmbedding.inclusion`, `Topology.IsClosedEmbedding.inclusion`, `Measurable.subtype_mk`, `Measurable.imp`, `Path.symm_continuous_family`, `Continuous.upperHalfPlaneMk` These theorems become simple: `hasFDerivAt_prodMk_left`, `hasFDerivAt_prodMk_right`, `contDiff_prodMk_left`, `contDiff_prodMk_right` [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 57/33 Mathlib/Tactic/FunProp/Core.lean,Mathlib/Tactic/FunProp/FunctionData.lean,Mathlib/Tactic/FunProp/Theorems.lean,Mathlib/Topology/Homeomorph/Lemmas.lean,MathlibTest/fun_prop_dev.lean 5 6 ['gasparattila', 'github-actions', 'grunweg', 'lecopivo', 'mathlib-merge-conflicts'] dwrensha
assignee:dwrensha
 1
15-25546
15 days ago
20-22680
20 days ago
52-20230
52 days
36224 gasparattila
author:gasparattila
 feat(Analysis/Normed/Affine): (pseudo)metric on `V →ᴬ[𝕜] Q` --- - [x] depends on: #36083 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 33/32 Mathlib/Analysis/Normed/Affine/ContinuousAffineMap.lean,Mathlib/Analysis/Normed/Group/AddTorsor.lean 2 2 ['github-actions', 'mathlib-dependent-issues'] sgouezel
assignee:sgouezel
 none
15-10571
15 days ago
15-54333
15 days ago
15-81932
15 days
36917 iarnoldy
author:iarnoldy
 feat(LinearAlgebra/CliffordAlgebra): bivector Lie subalgebra Define the submodule of grade-n elements (n-vectors) in a Clifford algebra and show that bivectors (n = 2) form a `LieSubalgebra` under the commutator bracket. This gives the standard construction of so(Q) from Cl(Q). Main definitions: * `CliffordAlgebra.nvector` — grade-n submodule, spanned by n-fold products of ι * `CliffordAlgebra.bivector` — nvector 2 Q, the bivector submodule * `CliffordAlgebra.bivectorLieSubalgebra` — LieSubalgebra of bivectors Main results: * `CliffordAlgebra.lie_ι_mul_ι` — explicit commutator formula for bivector generators * `CliffordAlgebra.lie_mem_bivector` — bracket closure of the bivector submodule * `CliffordAlgebra.bivector_le_evenOdd_zero` — bivectors lie in the even part The `LieModule` instance for `CliffordAlgebra Q` acting on itself is provided explicitly (`instLieModuleSelf`) because automatic synthesis exceeds the default heartbeat limit. AI disclosure: This code was generated with AI assistance (Claude, Anthropic). The submitter directed the construction and QA but is not a Lean programmer. The mathematical content is classical (Doran & Lasenby, Ch. 3). Extra review scrutiny is welcomed. Co-authored-by: Claude --- Open design questions for reviewers: 1. **Naming**: Is `nvector` the right name? Eric Wieser suggested generalizing to n-vectors. Alternatives: `ιProd`, `grade`, or following the `exteriorPower` pattern via `equivExterior` pullback. 2. **Scalar contamination**: The spanning set `{ι m₁ * ι m₂}` includes `ι m * ι m = Q(m)` (scalars). Eric suggested pulling back `exteriorPower` through `equivExterior` for pure grades (requires `Invertible (2 : R)`). Happy to rework if that's preferred. 3. **instLieModuleSelf**: Should this be an upstream issue rather than a local workaround? @ocfnash 4. **ι_mul_ι_comm'**: This may duplicate existing API (`ι_mul_ι_comm b a` plus `polar_comm`). Happy to inline if reviewers prefer. Discussed on Zulip: https://leanprover.zulipchat.com (Is there code for X? thread) new-contributor t-algebra LLM-generated
label:t-algebra$
 338/0 Mathlib.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Bivector.lean 2 2 ['github-actions'] eric-wieser
assignee:eric-wieser
 none
15-10564
15 days ago
27-16932
27 days ago
27-18146
27 days
37477 kebekus
author:kebekus
 feat: canonical decomposition of complex-meromorphic functions on disks Establish the Finite Canonical Decomposition of meromorphic functions, where a complex-meromorphic function `f` on a disk is written as a product of an analytic function without zeros and poles, and canonical factors that take only values of norm one on the boundary of the disk. A future PR will extend this theorem to handle zeros/poles on the boundary of the disk. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 265/5 Mathlib/Analysis/Complex/CanonicalDecomposition.lean,Mathlib/Analysis/Meromorphic/Order.lean,Mathlib/Topology/MetricSpace/Pseudo/Defs.lean 3 1 ['github-actions'] sgouezel
assignee:sgouezel
 none
15-10555
15 days ago
15-66969
15 days ago
15-66958
15 days
30900 vihdzp
author:vihdzp
 feat: run-length encoding --- - [x] depends on: #30898 Moved from #17105. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 168/0 Mathlib.lean,Mathlib/Data/List/RunLength.lean,Mathlib/Data/List/SplitBy.lean 3 6 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'plp127'] pechersky
assignee:pechersky
 none
14-41278
14 days ago
14-41335
14 days ago
56-70988
56 days
36806 grunweg
author:grunweg
 fix(Tactic/Continuity): mark Continuous.comp' as unsafe This issue was pre-existing: `Continuous.comp'` was never full safe, as a constant function could be written as the composition of any function and a constant function (and then applying the lemma could lead to something unprovable). The change in #31607 triggered such a case: make is an unsafe rule with very high probability instead. This change broke three proofs: one was easy to switch to fun_prop; the others seemed to depend on this being a safe rule. I have added a workaround for now. There was another test failure, exposing a pre-existing internal bug in aesop. With smaller imports, continuity succeeds [zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/aesop.20error.20during.20proof.20reconstruction.2C.20goal.20not.20normalised/with/580202602), so I have accepted this result as fine. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 54/2 Mathlib/Analysis/RCLike/Basic.lean,Mathlib/Condensed/Light/TopCatAdjunction.lean,Mathlib/Condensed/TopCatAdjunction.lean,Mathlib/Topology/Continuous.lean,MathlibTest/Continuity.lean 5 1 ['github-actions'] dwrensha
assignee:dwrensha
 none
14-10465
14 days ago
29-48357
29 days ago
29-48354
29 days
37536 grunweg
author:grunweg
 chore: mark coordinateChange_apply_snd simp --- Inspired by #35978 and its follow-up #37535. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry 8/9 Mathlib/Geometry/Manifold/VectorBundle/Basic.lean,Mathlib/Geometry/Manifold/VectorBundle/MDifferentiable.lean,Mathlib/Topology/FiberBundle/Trivialization.lean 3 4 ['github-actions', 'grunweg', 'leanprover-radar'] PatrickMassot
assignee:PatrickMassot
 none
14-10457
14 days ago
14-57657
14 days ago
14-57646
14 days

PRs with just failing CI, but only often-spurious jobs

Number Author Title Description Labels +/- Modified files (first 100) 📝 💬 All users who commented or reviewed Assignee(s) Updated Last status change total time in review
28803 astrainfinita
author:astrainfinita
 refactor: unbundle algebra from `ENormed*` Further speed up the search in the algebraic typeclass hierarchy by avoiding searching for `TopologicalSpace`. This PR continues the work from #23961. - Change `ESeminormed(Add)Monoid` and `ENormed(Add)Monoid` so they no longer carry algebraic data. - Deprecate `ESeminormed(Add)CommMonoid` and `ENormed(Add)CommMonoid` in favor of `ESeminormed(Add)Monoid` and `ENormed(Add)Monoid` with a commutative algebraic typeclass. |Old|New| |---|---| | `[ESeminormed(Add)(Comm)Monoid E]` | `[(Add)(Comm)Monoid E] [ESeminormed(Add)Monoid E]` | | `[ENormed(Add)(Comm)Monoid]` | `[(Add)(Comm)Monoid E] [ENormed(Add)Monoid]` | See [Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2328803.20refactor.3A.20unbundle.20algebra.20from.20.60ENormed*.60/with/536024350) ------------ - [x] depends on: #28813 t-algebra merge-conflict slow-typeclass-synthesis awaiting-zulip t-analysis
label:t-algebra$
 80/63 Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Analysis/Normed/Group/Continuity.lean,Mathlib/Analysis/Normed/Group/InfiniteSum.lean,Mathlib/Analysis/NormedSpace/IndicatorFunction.lean,Mathlib/MeasureTheory/Function/L1Space/AEEqFun.lean,Mathlib/MeasureTheory/Function/L1Space/HasFiniteIntegral.lean,Mathlib/MeasureTheory/Function/L1Space/Integrable.lean,Mathlib/MeasureTheory/Function/LocallyIntegrable.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Function/LpSeminorm/CompareExp.lean,Mathlib/MeasureTheory/Function/LpSeminorm/TriangleInequality.lean,Mathlib/MeasureTheory/Integral/IntegrableOn.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/Basic.lean 14 28 ['astrainfinita', 'bryangingechen', 'github-actions', 'grunweg', 'kbuzzard', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'mathlib-bors', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'sgouezel'] grunweg
assignee:grunweg
226-14517
7 months ago
234-52071
234 days ago
0-19882
5 hours
25737 robin-carlier
author:robin-carlier
 feat(AlgebraicTopology/SimplexCategory/GeneratorsRelations/NormalForms): Normal forms for `P_δ`s We prove that admissible lists indeed provide a normal form for morphisms of satisfying `P_δ`. To this end, we introduce `standardδ`, a construction that takes a list and turn it into a composition of `δ i`s in `SimplexCategoryGenRel`. We then prove that, thanks to the first simplicial identity, composition on the left corresponds to simplicial insertion in the list. This gives existence of a normal form for every morphism satisfying `P_δ`. For unicity, we introduce an auxiliary function `simplicialEvalδ : (List ℕ) → ℕ → ℕ` and show that for admissible lists, it lifts to `ℕ` the `orderHom` attached to `toSimplexCategory.map standardδ`, and that we can recover elements of the list only by looking at values of this function. Part of a series of PR formalising that `SimplexCategoryGenRel` is equivalent to `SimplexCategory`. --- - [x] depends on: #25736 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #21746.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/21746* t-algebraic-topology delegated t-category-theory 181/2 Mathlib/AlgebraicTopology/SimplexCategory/GeneratorsRelations/NormalForms.lean 1 6 ['github-actions', 'joelriou', 'mathlib-bors', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
45-41935
1 month ago
178-41662
178 days ago
0-22513
6 hours
35436 daniel-carranza
author:daniel-carranza
 feat(CategoryTheory/Monoidal/Closed): Prove the isomorphism of internal hom objects C(x \otimes y, z) and C(y, C(x, z)) Prove the currying-uncurrying isomorphism `C(x \otimes y, z) \iso C(y, C(x, z))` between internal hom objects of a closed monoidal category `C`. --- This result is connected to the infinity-cosmos project, and is used to prove that a closed monoidal category enriched in itself admits all cotensors. ~Line 81 currently contains a one-line proof in tactics mode `exact rfl`. When trying to use `rfl` outside of tactics mode, an error is thrown~ (Fixed, thank you @robin-carlier!). Any help with this (or any other aspect of the formalization) is greatly appreciated! [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-category-theory infinity-cosmos delegated 89/0 Mathlib.lean,Mathlib/CategoryTheory/Monoidal/Closed/InternalCurrying.lean 2 15 ['dagurtomas', 'daniel-carranza', 'github-actions', 'joelriou', 'mathlib-bors', 'riccardobrasca', 'robin-carlier'] adamtopaz
assignee:adamtopaz
41-32491
1 month ago
49-20630
49 days ago
7-67484
7 days
33466 Shreyas4991
author:Shreyas4991
 refactor(Combinatorics/Digraph): add vertex sets --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics merge-conflict please-adopt 382/55 Mathlib/Combinatorics/Digraph/Basic.lean,Mathlib/Combinatorics/Digraph/Orientation.lean 2 83 ['IvanRenison', 'Shreyas4991', 'SnirBroshi', 'YaelDillies', 'copilot-pull-request-reviewer', 'github-actions', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'vihdzp', 'vlad902'] awainverse
assignee:awainverse
32-54623
1 month ago
34-78734
34 days ago
27-58977
27 days
30451 kckennylau
author:kckennylau
 feat(HomogeneousIdeal): generalize to homogeneous submodule Continuation of #30437 with permission from @jjaassoonn, which is a continuation of #9820 . The definitions, constructions and theorems in `HomogeneousIdeal.lean` are generalized to homogeneous submodules. Let `R` be a graded ring and `M` be a graded `R`-module. Say an `R`-submodule `N` of `M` is homogeneous if for every `x` in `N`, each projection of `x` to `M_i` is in `N`. None of this file's results depends on the grading on `R`, but we include the grading on `R` for technical reasons. We define the "homogeneous core" of a not necessarily homogeneous submodule N to be the biggest homogeneous submodule contained within N, and the "homogeneous hull" to be the smallest homogeneous submodule that contains N. All definitions/constructions/theorems are then copied for ideals/homogeneous ideals. The motivation of this generalization is graded quotient module. (#18716) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory awaiting-author merge-conflict 581/185 Mathlib/Algebra/BigOperators/Finsupp/Basic.lean,Mathlib/Algebra/DirectSum/Basic.lean,Mathlib/Algebra/DirectSum/Decomposition.lean,Mathlib/Algebra/DirectSum/Finsupp.lean,Mathlib/Algebra/Module/GradedModule.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Basic.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Scheme.lean,Mathlib/RingTheory/GradedAlgebra/Homogeneous/Ideal.lean,Mathlib/RingTheory/GradedAlgebra/Homogeneous/Submodule.lean,Mathlib/RingTheory/GradedAlgebra/Radical.lean 10 23 ['github-actions', 'mariainesdff', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] mariainesdff
assignee:mariainesdff
22-71466
22 days ago
36-47025
36 days ago
22-62559
22 days
37556 edwin1729
author:edwin1729
 feat(Topology/Order): Locale.localePointOfSpacePoint if we have a Scott Topology from an Algebraic DCPO (3/4) in a series of PRs proving that "Scott Topologies over Algebraic DCPOs are Sober" We prove here that the unit of the adjunction from `TopCat` to `Locale` defined in `Topology/Order/Category/FrameAdjunction.lean` is a surjective mapping, under the following condition: The underlying TopologicalSpace must be a Scott Topology generated with an underlying Algebraic DCPO structure. - [ ] depends on: #37445 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology new-contributor blocked-by-other-PR 393/1 Mathlib.lean,Mathlib/Topology/Order/ScottTopology.lean,Mathlib/Topology/Order/ScottTopologyDCPO.lean,docs/references.bib 4 4 ['github-actions', 'mathlib-dependent-issues'] nobody
14-40221
14 days ago
14-40222
14 days ago
0-1300
21 minutes
37753 JovanGerb
author:JovanGerb
 chore(Order/Filter/Basic): use `to_dual` for `≤ᶠ` Use `to_dual` on lemmas about `EventuallyLE`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 19/6 Mathlib/Order/Filter/Basic.lean 1 2 ['github-actions', 'vihdzp'] nobody
9-40717
9 days ago
9-47329
9 days ago
9-47318
9 days
37386 gasparattila
author:gasparattila
 chore: call `dsimp` in the default tactic of `ContinuousLinearMap` --- This will also reduce the breakage in https://github.com/leanprover-community/mathlib4/pull/35548. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology awaiting-author 33/76 Mathlib/Algebra/Category/ContinuousCohomology/Basic.lean,Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/NonUnital.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Unital.lean,Mathlib/Analysis/Distribution/DerivNotation.lean,Mathlib/Analysis/Distribution/TestFunction.lean,Mathlib/Analysis/Fourier/Notation.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Analysis/InnerProductSpace/Spectrum.lean,Mathlib/Analysis/Normed/Algebra/Spectrum.lean,Mathlib/Analysis/Normed/Lp/PiLp.lean,Mathlib/Analysis/Normed/Lp/ProdLp.lean,Mathlib/Analysis/Normed/Module/WeakDual.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/Rpow/ConjSqrt.lean,Mathlib/MeasureTheory/Function/SimpleFuncDenseLp.lean,Mathlib/MeasureTheory/Measure/FiniteMeasure.lean,Mathlib/NumberTheory/ModularForms/JacobiTheta/TwoVariable.lean,Mathlib/Probability/Distributions/Fernique.lean,Mathlib/Probability/Distributions/Gaussian/IsGaussianProcess/Basic.lean,Mathlib/Probability/Distributions/Gaussian/IsGaussianProcess/Independence.lean,Mathlib/Topology/Algebra/Algebra.lean,Mathlib/Topology/Algebra/GroupCompletion.lean,Mathlib/Topology/Algebra/LinearMapCompletion.lean,Mathlib/Topology/Algebra/Module/Alternating/Topology.lean,Mathlib/Topology/Algebra/Module/LinearMap.lean,Mathlib/Topology/Algebra/Module/LinearMapPiProd.lean,Mathlib/Topology/Algebra/Module/Multilinear/Basic.lean,Mathlib/Topology/Algebra/Module/Multilinear/Topology.lean,Mathlib/Topology/Algebra/Module/Star.lean,Mathlib/Topology/Algebra/Star/LinearMap.lean,Mathlib/Topology/CompactOpen.lean,Mathlib/Topology/Constructions.lean,Mathlib/Topology/ContinuousMap/Algebra.lean,Mathlib/Topology/ContinuousMap/Ideals.lean,Mathlib/Topology/Instances/TrivSqZeroExt.lean 36 15 ['gasparattila', 'github-actions', 'j-loreaux', 'leanprover-radar', 'mathlib-bors', 'themathqueen'] j-loreaux
assignee:j-loreaux
7-66914
7 days ago
9-37442
9 days ago
6-4534
6 days
38049 WilliamCoram
author:WilliamCoram
 feat: lemmas towards showing gaussNorm on MvPowerSeries is an absolute value We prove lemmas: ``gaussNorm_mul_le`` and ``gaussNorm_le_mul`` which will allow us to show it is an absolute value on Mv restricted power series. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory new-contributor 138/1 Mathlib/RingTheory/MvPowerSeries/GaussNorm.lean 1 3 ['github-actions'] nobody
2-37916
2 days ago
2-39264
2 days ago
2-39253
2 days
34875 banrovegrie
author:banrovegrie
 feat(LinearAlgebra/Matrix): add Sherman-Morrison formula Mathlib has the matrix determinant lemma (`det_add_replicateCol_mul_replicateRow` in SchurComplement.lean) but lacked the corresponding inverse formula. This PR fills that gap. - Add `Matrix.inv_add_vecMulVec`: Sherman-Morrison formula for `(A + uv^T)^{-1}` - Add `Matrix.inv_sub_vecMulVec`: subtraction variant - Add `Matrix.isUnit_det_add_vecMulVec`: invertibility under the formula's hypotheses ## Test plan - [x] `lake build` passes - [x] Lines within 100 char limit - [x] All declarations have docstrings t-algebra new-contributor awaiting-author
label:t-algebra$
 135/0 Mathlib.lean,Mathlib/LinearAlgebra/Matrix/ShermanMorrison.lean 2 12 ['Xxxjdjdid', 'banrovegrie', 'chrisflav', 'copilot-pull-request-reviewer', 'eric-wieser', 'github-actions', 'wwylele'] chrisflav
assignee:chrisflav
1-38595
1 day ago
1-38595
1 day ago
69-6728
69 days
38048 gilesgshaw
author:gilesgshaw
 feat(Topology/EMetricSpace/Defs): add theorems `EMetric.continuous*_iff*` Add 8 theorems of the form `EMetric.continuous*_iff*`, which are exactly analogous to existing theorems of the form `Metric.continuous*_iff*` --- Thus the API between the following files (already pretty consistent) is now more consistent `Topology.MetricSpace.Pseudo.Defs` for `PseudoMetricSpace` `Topology.EMetricSpace.Defs` for `PseudoEMetricSpace` I have copied the theorems exactly (that is, changing only `[e]dist` and `Pseudo[E]MetricSpace`), however perhaps there will be suggestions to make other changes at this opportunity. (E.g. is it worth making the use of strict implicit parameters more consistent - possibly not?) new-contributor t-topology 44/0 Mathlib/Topology/EMetricSpace/Defs.lean 1 3 ['github-actions'] j-loreaux
assignee:j-loreaux
1-10045
1 day ago
2-41719
2 days ago
2-41708
2 days
37938 SamuelSchlesinger
author:SamuelSchlesinger
 feat(Probability/Posterior): Posterior PMFs and Various Lemmas Upstreaming the probability lemmas needed in https://github.com/leanprover/cslib/pull/464. t-measure-probability new-contributor awaiting-author 130/0 Mathlib.lean,Mathlib/Probability/ProbabilityMassFunction/Posterior.lean 2 5 ['EtienneC30', 'SamuelSchlesinger', 'github-actions'] RemyDegenne
assignee:RemyDegenne
0-58456
16 hours ago
0-66213
18 hours ago
0-77202
21 hours

PRs addressing technical debt

Number Author Title Description Labels +/- Modified files (first 100) 📝 💬 All users who commented or reviewed Assignee(s) Updated Last status change total time in review
13791 digama0
author:digama0
 refactor: Primrec and Partrec General cleanup of the `Primrec` and `Partrec` files, to better adjust to lean 4 things. The main user-visible change is that `Primrec₂` is no longer a `def` but an `abbrev`, because it was causing inference issues in lean 4. I also removed all the nonterminal `simp`s in `PartrecCode.lean`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability tech debt 585/778 Mathlib/Computability/Ackermann.lean,Mathlib/Computability/Halting.lean,Mathlib/Computability/Partrec.lean,Mathlib/Computability/PartrecCode.lean,Mathlib/Computability/Primrec.lean 5 2 ['github-actions', 'grunweg'] nobody
606-27375
1 year ago
670-16961
670 days ago
1-84718
1 day
15448 urkud
author:urkud
 chore(*): deprecate `Option.elim'` Use `Option.elim` instead. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author tech debt 54/50 Mathlib/Algebra/BigOperators/Option.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Algebra/MvPolynomial/Variables.lean,Mathlib/Analysis/BoxIntegral/Partition/Additive.lean,Mathlib/Analysis/BoxIntegral/Partition/Basic.lean,Mathlib/Analysis/BoxIntegral/Partition/Split.lean,Mathlib/Analysis/Calculus/LagrangeMultipliers.lean,Mathlib/CategoryTheory/Category/PartialFun.lean,Mathlib/Computability/TMToPartrec.lean,Mathlib/Data/Option/Defs.lean,Mathlib/LinearAlgebra/Basis.lean,Mathlib/Logic/Embedding/Set.lean,Mathlib/Logic/Equiv/Basic.lean,Mathlib/MeasureTheory/OuterMeasure/Induced.lean,Mathlib/NumberTheory/Dioph.lean,Mathlib/Topology/Compactness/Paracompact.lean,Mathlib/Topology/LocallyFinite.lean 17 12 ['Ruben-VandeVelde', 'YaelDillies', 'github-actions', 'grunweg', 'urkud'] nobody
605-37340
1 year ago
614-83502
614 days ago
7-18420
7 days
33138 gasparattila
author:gasparattila
 chore(MeasureTheory/Measure/Stieltjes): remove `backward.privateInPublic` In #32482, some definitions in this file were rewritten using private declarations. However, this made `StieltjesFunction.length` unusable, since its API uses private declarations even in statements. This PR fixes this by problem by specializing `length_eq` to `NoMinOrder` and adding a new lemma for the `OrderBot` case. The other lemmas involving the private declarations are made private, except for `length_subadditive_Icc_Ioo`, which is reverted to the previous statement. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability tech debt awaiting-author 35/30 Mathlib/MeasureTheory/Measure/Stieltjes.lean 1 6 ['github-actions', 'grunweg', 'sgouezel', 'vihdzp'] sgouezel
assignee:sgouezel
112-21613
3 months ago
112-21613
112 days ago
5-1594
5 days
12879 grunweg
author:grunweg
 feat: port ge_or_gt linter from mathlib3 Code works and is essentially green: next step is to split up into separate PRs. Feedback welcome on whether: - all the test changes are good, or I should simply allow it in more cases - if calc blocks need to be explicitly exempt --- - [ ] depends on: #12933 - [ ] depends on: #12934 - [ ] depends on: #12931 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-linter tech debt blocked-by-other-PR 736/319 Archive/Imo/Imo1960Q1.lean,Archive/Imo/Imo1962Q1.lean,Archive/Imo/Imo1988Q6.lean,Archive/Imo/Imo1994Q1.lean,Archive/Imo/Imo2001Q2.lean,Archive/Imo/Imo2005Q3.lean,Archive/Imo/Imo2006Q3.lean,Archive/Imo/Imo2008Q2.lean,Archive/Imo/Imo2008Q3.lean,Archive/Imo/Imo2008Q4.lean,Archive/Imo/Imo2011Q5.lean,Archive/Imo/Imo2019Q4.lean,Archive/Sensitivity.lean,Archive/Wiedijk100Theorems/AreaOfACircle.lean,Archive/Wiedijk100Theorems/BallotProblem.lean,Archive/Wiedijk100Theorems/BirthdayProblem.lean,Archive/Wiedijk100Theorems/CubingACube.lean,Mathlib.lean,Mathlib/Algebra/DualNumber.lean,Mathlib/Algebra/Order/CauSeq/BigOperators.lean,Mathlib/Algebra/Order/Field/Basic.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Polynomial/Basic.lean,Mathlib/Algebra/Polynomial/Degree/Definitions.lean,Mathlib/Algebra/Star/CHSH.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/Calculus/UniformLimitsDeriv.lean,Mathlib/Analysis/Complex/Hadamard.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Basic.lean,Mathlib/Analysis/InnerProductSpace/Projection.lean,Mathlib/Analysis/Normed/Group/ControlledClosure.lean,Mathlib/Analysis/NormedSpace/MStructure.lean,Mathlib/Analysis/SpecialFunctions/Log/Base.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Basic.lean,Mathlib/Combinatorics/SimpleGraph/DegreeSum.lean,Mathlib/Combinatorics/SimpleGraph/LapMatrix.lean,Mathlib/Computability/AkraBazzi/AkraBazzi.lean,Mathlib/Computability/AkraBazzi/GrowsPolynomially.lean,Mathlib/Data/Complex/Basic.lean,Mathlib/Data/FP/Basic.lean,Mathlib/Data/Finset/Basic.lean,Mathlib/Data/Finset/Fold.lean,Mathlib/Data/Finsupp/Notation.lean,Mathlib/Data/Int/Lemmas.lean,Mathlib/Data/Nat/Dist.lean,Mathlib/Data/Nat/Lattice.lean,Mathlib/Data/Nat/Parity.lean,Mathlib/Data/Nat/Upto.lean,Mathlib/Data/Ordmap/Ordset.lean,Mathlib/Data/PNat/Basic.lean,Mathlib/Data/UInt.lean,Mathlib/GroupTheory/Coxeter/Length.lean,Mathlib/MeasureTheory/Constructions/Polish.lean,Mathlib/MeasureTheory/Covering/Besicovitch.lean,Mathlib/MeasureTheory/Covering/Vitali.lean,Mathlib/MeasureTheory/Covering/VitaliFamily.lean,Mathlib/MeasureTheory/Integral/Layercake.lean,Mathlib/NumberTheory/LegendreSymbol/JacobiSymbol.lean,Mathlib/NumberTheory/Padics/Hensel.lean,Mathlib/NumberTheory/Padics/PadicNorm.lean,Mathlib/NumberTheory/PellMatiyasevic.lean,Mathlib/NumberTheory/Rayleigh.lean,Mathlib/Order/Filter/AtTopBot.lean,Mathlib/Probability/Process/Stopping.lean,Mathlib/RingTheory/Adjoin/Basic.lean,Mathlib/RingTheory/Polynomial/Basic.lean,Mathlib/SetTheory/Ordinal/Notation.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CancelDenoms/Core.lean,Mathlib/Tactic/Common.lean,Mathlib/Tactic/IntervalCases.lean,Mathlib/Tactic/Linarith/Datatypes.lean,Mathlib/Tactic/Linarith/Lemmas.lean,Mathlib/Tactic/Linarith/Oracle/FourierMotzkin.lean,Mathlib/Tactic/Linter/GeOrGt.lean,Mathlib/Tactic/Linter/Style.lean,Mathlib/Tactic/NormNum/GCD.lean,Mathlib/Tactic/NormNum/Inv.lean,Mathlib/Tactic/Ring/Basic.lean,Mathlib/Topology/Category/Profinite/Nobeling.lean,Mathlib/Topology/ContinuousFunction/Bounded.lean,Mathlib/Topology/MetricSpace/CauSeqFilter.lean,Mathlib/Topology/MetricSpace/Cauchy.lean,Mathlib/Topology/MetricSpace/Closeds.lean,Mathlib/Topology/Sequences.lean,scripts/lint-style.py,test/Explode.lean,test/GCongr/inequalities.lean,test/GeOrGt.lean,test/LibrarySearch/IsCompact.lean,test/LibrarySearch/basic.lean,test/Recall.lean,test/Rify.lean,test/Use.lean,test/cancel_denoms.lean,test/congr.lean,test/delabLinearIndependent.lean,test/delaborators.lean,test/interval_cases.lean,test/linarith.lean 109 4 ['github-actions', 'grunweg', 'leanprover-community-mathlib4-bot', 'urkud'] nobody
80-25548
2 months ago
701-26542
701 days ago
0-15256
4 hours
24100 eric-wieser
author:eric-wieser
 feat: restore some explicit binders from Lean 3 Part of #24099 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author tech debt t-topology t-algebra
label:t-algebra$
 39/42 Mathlib/Data/FinEnum.lean,Mathlib/FieldTheory/Galois/Profinite.lean,Mathlib/Topology/Bases.lean,Mathlib/Topology/Compactness/CompactlyGeneratedSpace.lean,Mathlib/Topology/MetricSpace/IsometricSMul.lean,Mathlib/Topology/Metrizable/CompletelyMetrizable.lean,Mathlib/Topology/Metrizable/Uniformity.lean,Mathlib/Topology/Order.lean,Mathlib/Topology/Order/LowerUpperTopology.lean,Mathlib/Topology/UniformSpace/UniformEmbedding.lean 10 3 ['github-actions', 'grunweg', 'leanprover-community-bot-assistant'] nobody
75-21613
2 months ago
366-12845
366 days ago
0-1017
16 minutes
36635 Vierkantor
author:Vierkantor
 chore(*): turn comments before declarations into docstrings This PR goes through the whole of Mathlib and replaces `/- comments -/` with `/-- docstrings -/` or `/-! module docs -/` whenever they appear before a declaration. A lot of these appear to be simple typos, where a docstring was actually intended. Where a comment was originally intended, I would argue it is still a good idea include the comments in the generated documentation, or at least it does not hurt anyone. These instances were found by a linter, in an upcoming PR: #36636. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) tech debt merge-conflict 253/260 Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Abelian.lean,Mathlib/Algebra/Category/ModuleCat/Semi.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Subgroup/MulOppositeLemmas.lean,Mathlib/Algebra/Group/Submonoid/Basic.lean,Mathlib/Algebra/Group/Submonoid/Membership.lean,Mathlib/Algebra/Group/Subsemigroup/Basic.lean,Mathlib/Algebra/GroupWithZero/Range.lean,Mathlib/Algebra/Order/Group/Unbundled/Basic.lean,Mathlib/Algebra/Order/GroupWithZero/Unbundled/Defs.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Defs.lean,Mathlib/Algebra/Order/Ring/Star.lean,Mathlib/Algebra/Order/Sub/Defs.lean,Mathlib/Algebra/Polynomial/CoeffList.lean,Mathlib/Algebra/Ring/Ext.lean,Mathlib/Algebra/SkewMonoidAlgebra/Basic.lean,Mathlib/Algebra/Star/SelfAdjoint.lean,Mathlib/AlgebraicGeometry/Morphisms/RingHomProperties.lean,Mathlib/AlgebraicGeometry/Morphisms/WeaklyEtale.lean,Mathlib/Analysis/Analytic/Constructions.lean,Mathlib/Analysis/CStarAlgebra/Module/Constructions.lean,Mathlib/Analysis/CStarAlgebra/Module/Synonym.lean,Mathlib/Analysis/Calculus/ContDiff/FaaDiBruno.lean,Mathlib/Analysis/Complex/UpperHalfPlane/MoebiusAction.lean,Mathlib/Analysis/Convex/Function.lean,Mathlib/Analysis/Distribution/SchwartzSpace/Fourier.lean,Mathlib/Analysis/Distribution/TemperedDistribution.lean,Mathlib/Analysis/Fourier/Convolution.lean,Mathlib/Analysis/InnerProductSpace/Adjoint.lean,Mathlib/Analysis/InnerProductSpace/Orthogonal.lean,Mathlib/Analysis/InnerProductSpace/TensorProduct.lean,Mathlib/Analysis/LConvolution.lean,Mathlib/Analysis/LocallyConvex/WeakDual.lean,Mathlib/Analysis/Meromorphic/Basic.lean,Mathlib/Analysis/Normed/Algebra/GelfandMazur.lean,Mathlib/Analysis/Normed/Algebra/Unitization.lean,Mathlib/Analysis/Normed/Module/FiniteDimension.lean,Mathlib/Analysis/Normed/Module/MStructure.lean,Mathlib/Analysis/Normed/Operator/Banach.lean,Mathlib/Analysis/Normed/Operator/ContinuousAlgEquiv.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/Analysis/SpecialFunctions/Complex/Circle.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Cotangent.lean,Mathlib/CategoryTheory/Action/Concrete.lean,Mathlib/CategoryTheory/Equivalence.lean,Mathlib/CategoryTheory/FintypeCat.lean,Mathlib/CategoryTheory/Iso.lean,Mathlib/CategoryTheory/Limits/Cones.lean,Mathlib/CategoryTheory/Limits/FintypeCat.lean,Mathlib/CategoryTheory/Limits/Shapes/BinaryBiproducts.lean,Mathlib/CategoryTheory/Limits/Shapes/Biproducts.lean,Mathlib/CategoryTheory/Monoidal/Closed/Ideal.lean,Mathlib/CategoryTheory/Products/Basic.lean,Mathlib/Combinatorics/Hindman.lean,Mathlib/Combinatorics/SimpleGraph/Hall.lean,Mathlib/Combinatorics/SimpleGraph/Walks/Counting.lean,Mathlib/Data/Complex/Basic.lean,Mathlib/Data/ENNReal/Holder.lean,Mathlib/Data/Finset/Sym.lean,Mathlib/Data/Fintype/Sets.lean,Mathlib/Data/Nat/Multiplicity.lean,Mathlib/Data/Set/Pointwise/Support.lean,Mathlib/Data/Set/Semiring.lean,Mathlib/Data/Sign/Defs.lean,Mathlib/FieldTheory/RatFunc/AsPolynomial.lean,Mathlib/Geometry/Euclidean/Volume/Measure.lean,Mathlib/GroupTheory/Coset/Defs.lean,Mathlib/GroupTheory/FreeGroup/IsFreeGroup.lean,Mathlib/GroupTheory/GroupAction/MultipleTransitivity.lean,Mathlib/GroupTheory/GroupAction/SubMulAction.lean,Mathlib/GroupTheory/OrderOfElement.lean,Mathlib/GroupTheory/OreLocalization/Basic.lean,Mathlib/GroupTheory/QuotientGroup/Defs.lean,Mathlib/GroupTheory/SpecificGroups/Alternating/MaximalSubgroups.lean,Mathlib/LinearAlgebra/CliffordAlgebra/SpinGroup.lean,Mathlib/LinearAlgebra/Complex/Module.lean,Mathlib/LinearAlgebra/DFinsupp.lean,Mathlib/LinearAlgebra/Isomorphisms.lean,Mathlib/LinearAlgebra/LinearIndependent/Lemmas.lean,Mathlib/LinearAlgebra/PiTensorProduct.lean,Mathlib/Logic/Basic.lean,Mathlib/Logic/UnivLE.lean,Mathlib/MeasureTheory/Constructions/BorelSpace/Basic.lean,Mathlib/MeasureTheory/Function/ConditionalLExpectation.lean,Mathlib/MeasureTheory/Function/JacobianOneDim.lean,Mathlib/MeasureTheory/Function/UniformIntegrable.lean,Mathlib/MeasureTheory/Group/Measure.lean,Mathlib/MeasureTheory/Integral/Lebesgue/Add.lean,Mathlib/MeasureTheory/MeasurableSpace/Constructions.lean,Mathlib/MeasureTheory/Measure/Haar/NormedSpace.lean,Mathlib/MeasureTheory/Measure/Haar/OfBasis.lean,Mathlib/MeasureTheory/Measure/ProbabilityMeasure.lean,Mathlib/ModelTheory/Algebra/Field/CharP.lean,Mathlib/NumberTheory/Chebyshev.lean,Mathlib/NumberTheory/NumberField/Cyclotomic/Basic.lean,Mathlib/Order/BooleanAlgebra/Basic.lean,Mathlib/Order/BourbakiWitt.lean,Mathlib/Order/CompleteLattice/Basic.lean 139 10 ['JovanGerb', 'Vierkantor', 'github-actions', 'grunweg', 'mathlib-merge-conflicts'] nobody
22-67884
22 days ago
23-51954
23 days ago
2-9741
2 days
36911 jjdishere
author:jjdishere
 fix(RingTheory/Valuation): change `ValueGroup` from taking HomClass to Hom This PR refactors `MonoidWithZeroHom.valueMonoid`, `MonoidWithZeroHom.valueGroup`, `MonoidWithZeroHom.ValueGroup₀`, and `MonoidWithZeroHom.ValueGroup₀.embedding` to take a concrete `MonoidWithZeroHom` as input instead of a `MonoidWithZeroHomClass` instance, following rules described in [#mathlib4 > Mathlib's morphism hierarchy @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Mathlib.27s.20morphism.20hierarchy/near/554383157) As a result, we are able to remove several `erw` and many `set_option backward.isDefEq.respectTransparency false in`. The trade-off (foreseen by the same zulip thread) is that we now need to write an explicit coercion to `MonoidWithZeroHom` in `ValueGroup₀ (Valued.v (R := R) : R →*₀ Γ₀)`. Additionally, this PR fixes an instance on `NNReal`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #36532 - [ ] depends on: #36777 t-ring-theory tech debt blocked-by-other-PR merge-conflict 559/483 Mathlib/Algebra/GroupWithZero/Range.lean,Mathlib/Data/NNReal/Defs.lean,Mathlib/NumberTheory/NumberField/Completion/FinitePlace.lean,Mathlib/NumberTheory/Padics/Complex.lean,Mathlib/NumberTheory/Padics/HeightOneSpectrum.lean,Mathlib/NumberTheory/Padics/WithVal.lean,Mathlib/NumberTheory/RatFunc/Ostrowski.lean,Mathlib/RingTheory/DedekindDomain/AdicValuation.lean,Mathlib/RingTheory/LaurentSeries.lean,Mathlib/RingTheory/Valuation/Basic.lean,Mathlib/RingTheory/Valuation/Discrete/Basic.lean,Mathlib/RingTheory/Valuation/Discrete/RankOne.lean,Mathlib/RingTheory/Valuation/DiscreteValuativeRel.lean,Mathlib/RingTheory/Valuation/RankOne.lean,Mathlib/RingTheory/Valuation/ValuativeRel/Basic.lean,Mathlib/RingTheory/Valuation/ValuativeRel/Trivial.lean,Mathlib/Topology/Algebra/ValuativeRel/ValuativeTopology.lean,Mathlib/Topology/Algebra/Valued/LocallyCompact.lean,Mathlib/Topology/Algebra/Valued/NormedValued.lean,Mathlib/Topology/Algebra/Valued/ValuationTopology.lean,Mathlib/Topology/Algebra/Valued/ValuativeRel.lean,Mathlib/Topology/Algebra/Valued/ValuedField.lean,Mathlib/Topology/Algebra/Valued/WithVal.lean,Mathlib/Topology/Algebra/Valued/WithZeroMulInt.lean 24 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
21-603
21 days ago
27-32470
27 days ago
0-60
1 minute
37358 grunweg
author:grunweg
 chore(Geometry/Manifold): don't expose definitions depending on choice Some definitions in `Immersion.lean` still depend on choice, but need to be exposed for subsequent instances using their definition. We leave them alone for now. Also make not exposing definition the default in `LocalDiffeomorph.lean`; four definitions have useful definitional equalities, the others do not. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry tech debt 12/12 Mathlib/Geometry/Manifold/Immersion.lean,Mathlib/Geometry/Manifold/IsManifold/InteriorBoundary.lean,Mathlib/Geometry/Manifold/LocalDiffeomorph.lean,Mathlib/Geometry/Manifold/VectorBundle/Basic.lean 4 1 ['github-actions'] PatrickMassot
assignee:PatrickMassot
5-10206
5 days ago
6-42400
6 days ago
6-42762
6 days
37678 vihdzp
author:vihdzp
 chore(Dynamics/FixedPoints/Defs): create `Defs` file --- I got a large import warning on another PR for simply importing the definition `Function.fixedPoints`, which I found rather silly. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-dynamics tech debt maintainer-merge 67/44 Mathlib.lean,Mathlib/Dynamics/FixedPoints/Basic.lean,Mathlib/Dynamics/FixedPoints/Defs.lean,Mathlib/Logic/Function/Defs.lean 4 2 ['Ruben-VandeVelde', 'github-actions'] urkud
assignee:urkud
3-68508
3 days ago
11-18796
11 days ago
11-19363
11 days
37922 kim-em
author:kim-em
 chore: cleanup of adaptation notes --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) tech debt delegated merge-conflict 15/106 Mathlib/Algebra/Category/AlgCat/Limits.lean,Mathlib/Algebra/Category/ContinuousCohomology/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/PushforwardContinuous.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/Quasicoherent.lean,Mathlib/Algebra/Category/ModuleCat/Stalk.lean,Mathlib/Algebra/Category/Ring/Limits.lean,Mathlib/AlgebraicGeometry/AffineSpace.lean,Mathlib/AlgebraicGeometry/Cover/MorphismProperty.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Instances.lean,Mathlib/Analysis/InnerProductSpace/Adjoint.lean,Mathlib/Analysis/Real/Hyperreal.lean,Mathlib/CategoryTheory/Limits/Shapes/IsTerminal.lean,Mathlib/CategoryTheory/Monoidal/Transport.lean,Mathlib/CategoryTheory/ObjectProperty/Shift.lean,Mathlib/CategoryTheory/Shift/Localization.lean,Mathlib/CategoryTheory/Shift/Quotient.lean,Mathlib/Data/Int/LeastGreatest.lean,Mathlib/Data/Multiset/Fintype.lean,Mathlib/Data/NNRat/Defs.lean,Mathlib/Data/Rat/Floor.lean,Mathlib/Geometry/Euclidean/Angle/Oriented/Affine.lean,Mathlib/GroupTheory/Coxeter/Inversion.lean,Mathlib/RingTheory/Etale/QuasiFinite.lean,Mathlib/RingTheory/Flat/Equalizer.lean,Mathlib/RingTheory/Morita/Matrix.lean,Mathlib/RingTheory/PicardGroup.lean,Mathlib/RingTheory/RingHom/StandardSmooth.lean,Mathlib/RingTheory/Smooth/Fiber.lean,Mathlib/RingTheory/Valuation/Discrete/Basic.lean,Mathlib/Topology/Instances/Rat.lean 31 8 ['JovanGerb', 'github-actions', 'grunweg', 'kim-em', 'mathlib-bors', 'mathlib-merge-conflicts'] nobody
3-20086
3 days ago
5-71726
5 days ago
0-15955
4 hours
37503 Vierkantor
author:Vierkantor
 chore(*): remove comments mentioning obsolete note `[nolint_ge]` In Lean 3 times we used to have a `ge_or_gt` linter which complained if theorem statements contained `≥` or `>`, and it would be silenced with a reference to the library note `[nolint_ge]`. But the linter and its note never got ported, so the references are irrelevant and we should drop them. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter tech debt 1/6 Mathlib/Algebra/Order/CauSeq/Basic.lean,Mathlib/Order/Basic.lean,Mathlib/Order/Filter/AtTopBot/Finite.lean,Mathlib/Topology/EMetricSpace/Basic.lean,Mathlib/Topology/MetricSpace/Cauchy.lean 5 4 ['Vierkantor', 'github-actions', 'grunweg'] joneugster
assignee:joneugster
1-10054
1 day ago
15-45547
15 days ago
15-45536
15 days
38007 JovanGerb
author:JovanGerb
 perf(Data/Complex/Basic): `no_expose` the `Inv` and `Norm` instance This PR hides some more implementation details of complex numbers. It would be possible to `no_expose` even more definitions, but this could be at the cost of some proof writing convenience. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) tech debt 11/12 Mathlib/Analysis/Complex/Basic.lean,Mathlib/Analysis/Complex/Norm.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Basic.lean,Mathlib/Data/Complex/Basic.lean 4 6 ['JovanGerb', 'github-actions', 'grunweg', 'leanprover-radar'] jcommelin
assignee:jcommelin
0-10156
2 hours ago
3-36881
3 days ago
3-36959
3 days

PRs blocked on a zulip discussion

Number Author Title Description Labels +/- Modified files (first 100) 📝 💬 All users who commented or reviewed Assignee(s) Updated Last status change total time in review
17623 astrainfinita
author:astrainfinita
 feat(Algebra/Order/GroupWithZero/Unbundled): add some lemmas Some lemmas in `Algebra.Order.GroupWithZero.Unbundled` have incorrect or unsatisfactory names, or assumptions that can be omitted using `ZeroLEOneClass`. The lemmas added in this PR are versions of existing lemmas that use the correct or better name or `ZeroLEOneClass` to omit an assumption. The original lemmas will be deprecated in #17593. | New name | Old name | |-------------------------|-------------------------| | `mul_le_one_left₀` | `Left.mul_le_one_of_le_of_le` | | `mul_lt_one_of_le_of_lt_left₀` (`0 ≤ ·` version) / `mul_lt_one_of_le_of_lt_of_pos_left` | `Left.mul_lt_of_le_of_lt_one_of_pos` | | `mul_lt_one_of_lt_of_le_left₀` | `Left.mul_lt_of_lt_of_le_one_of_nonneg` | | `mul_le_one_right₀` | `Right.mul_le_one_of_le_of_le` | | `mul_lt_one_of_lt_of_le_right₀` (`0 ≤ ·` version) / `mul_lt_one_of_lt_of_le_of_pos_right` | `Right.mul_lt_one_of_lt_of_le_of_pos` | | `mul_lt_one_of_le_of_lt_right₀` | `Right.mul_lt_one_of_le_of_lt_of_nonneg` | The following lemmas use `ZeroLEOneClass`. | New name | Old name | |-------------------------|-------------------------| | `(Left.)one_le_mul₀` | `Left.one_le_mul_of_le_of_le` | | `Left.one_lt_mul_of_le_of_lt₀` | `Left.one_lt_mul_of_le_of_lt_of_pos` | | `Left.one_lt_mul_of_lt_of_le₀` | `Left.lt_mul_of_lt_of_one_le_of_nonneg` / `one_lt_mul_of_lt_of_le` (still there) | | `(Left.)one_lt_mul₀` | | | `Right.one_le_mul₀` | `Right.one_le_mul_of_le_of_le` | | `Right.one_lt_mul_of_lt_of_le₀` | `Right.one_lt_mul_of_lt_of_le_of_pos` | | `Right.one_lt_mul_of_le_of_lt₀` | `Right.one_lt_mul_of_le_of_lt_of_nonneg` / `one_lt_mul_of_le_of_lt` (still there) / `one_lt_mul` (still there) | | `Right.one_lt_mul₀` | `Right.one_lt_mul_of_lt_of_lt` | --- Split from #17593. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra awaiting-zulip t-order
label:t-algebra$
 146/44 Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/GroupWithZero/Unbundled.lean 2 11 ['YaelDillies', 'astrainfinita', 'github-actions', 'j-loreaux'] nobody
512-56408
1 year ago
519-48967
519 days ago
33-53295
33 days
15654 TpmKranz
author:TpmKranz
 feat(Computability): language-preserving maps between NFA and RE Map REs to NFAs via Thompson's construction and NFAs to REs using GNFAs Last chunk of #12648 --- - [ ] depends on: #15651 - [ ] depends on: #15649 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR new-contributor t-computability merge-conflict awaiting-zulip 985/2 Mathlib.lean,Mathlib/Computability/GNFA.lean,Mathlib/Computability/Language.lean,Mathlib/Computability/NFA.lean,Mathlib/Computability/RegularExpressions.lean,Mathlib/Data/FinEnum/Option.lean,docs/references.bib 7 3 ['github-actions', 'leanprover-community-mathlib4-bot', 'meithecatte'] nobody
346-19685
11 months ago
615-42870
615 days ago
0-179
2 minutes
17458 urkud
author:urkud
 refactor(Algebra/Group): make `IsUnit` a typeclass Also change some lemmas to assume `[IsUnit _]` instead of `[Invertible _]`. Motivated by potential non-defeq diamonds in #14986, see also [Zulip](https://leanprover.zulipchat.com/#narrow/stream/116395-maths/topic/Invertible.20and.20data) I no longer plan to merge this PR, but I'm going to cherry-pick some changes to a new PR before closing this one. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra awaiting-zulip
label:t-algebra$
 82/72 Mathlib/Algebra/CharP/Invertible.lean,Mathlib/Algebra/Group/Invertible/Basic.lean,Mathlib/Algebra/Group/Units/Defs.lean,Mathlib/Algebra/GroupWithZero/Invertible.lean,Mathlib/Algebra/GroupWithZero/Units/Basic.lean,Mathlib/Algebra/Polynomial/Degree/Units.lean,Mathlib/Algebra/Polynomial/Splits.lean,Mathlib/Analysis/Convex/Segment.lean,Mathlib/Analysis/Normed/Affine/Isometry.lean,Mathlib/Analysis/Normed/Ring/Units.lean,Mathlib/CategoryTheory/Linear/Basic.lean,Mathlib/FieldTheory/Finite/Basic.lean,Mathlib/FieldTheory/Separable.lean,Mathlib/FieldTheory/SeparableDegree.lean,Mathlib/GroupTheory/Submonoid/Inverses.lean,Mathlib/LinearAlgebra/AffineSpace/AffineEquiv.lean,Mathlib/LinearAlgebra/AffineSpace/Combination.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Contraction.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Inversion.lean,Mathlib/LinearAlgebra/CliffordAlgebra/SpinGroup.lean,Mathlib/LinearAlgebra/Eigenspace/Minpoly.lean,Mathlib/NumberTheory/MulChar/Basic.lean,Mathlib/RingTheory/Localization/NumDen.lean,Mathlib/RingTheory/Polynomial/Content.lean,Mathlib/RingTheory/Polynomial/GaussLemma.lean,Mathlib/RingTheory/Valuation/Basic.lean 26 12 ['MichaelStollBayreuth', 'acmepjz', 'eric-wieser', 'github-actions', 'leanprover-bot', 'leanprover-community-bot-assistant', 'urkud'] nobody
286-34
9 months ago
557-34077
557 days ago
0-66650
18 hours
25218 kckennylau
author:kckennylau
 feat(AlgebraicGeometry): Tate normal form of elliptic curves --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebraic-geometry awaiting-zulip new-contributor 291/26 Mathlib.lean,Mathlib/AlgebraicGeometry/EllipticCurve/IsomOfJ.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Modular/TateNormalForm.lean,Mathlib/AlgebraicGeometry/EllipticCurve/NormalForms.lean,Mathlib/AlgebraicGeometry/EllipticCurve/VariableChange.lean 5 31 ['MichaelStollBayreuth', 'Multramate', 'acmepjz', 'github-actions', 'grunweg', 'kckennylau', 'leanprover-community-bot-assistant'] nobody
285-85272
9 months ago
318-60389
318 days ago
6-44784
6 days
28803 astrainfinita
author:astrainfinita
 refactor: unbundle algebra from `ENormed*` Further speed up the search in the algebraic typeclass hierarchy by avoiding searching for `TopologicalSpace`. This PR continues the work from #23961. - Change `ESeminormed(Add)Monoid` and `ENormed(Add)Monoid` so they no longer carry algebraic data. - Deprecate `ESeminormed(Add)CommMonoid` and `ENormed(Add)CommMonoid` in favor of `ESeminormed(Add)Monoid` and `ENormed(Add)Monoid` with a commutative algebraic typeclass. |Old|New| |---|---| | `[ESeminormed(Add)(Comm)Monoid E]` | `[(Add)(Comm)Monoid E] [ESeminormed(Add)Monoid E]` | | `[ENormed(Add)(Comm)Monoid]` | `[(Add)(Comm)Monoid E] [ENormed(Add)Monoid]` | See [Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2328803.20refactor.3A.20unbundle.20algebra.20from.20.60ENormed*.60/with/536024350) ------------ - [x] depends on: #28813 t-algebra merge-conflict slow-typeclass-synthesis awaiting-zulip t-analysis
label:t-algebra$
 80/63 Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Analysis/Normed/Group/Continuity.lean,Mathlib/Analysis/Normed/Group/InfiniteSum.lean,Mathlib/Analysis/NormedSpace/IndicatorFunction.lean,Mathlib/MeasureTheory/Function/L1Space/AEEqFun.lean,Mathlib/MeasureTheory/Function/L1Space/HasFiniteIntegral.lean,Mathlib/MeasureTheory/Function/L1Space/Integrable.lean,Mathlib/MeasureTheory/Function/LocallyIntegrable.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Function/LpSeminorm/CompareExp.lean,Mathlib/MeasureTheory/Function/LpSeminorm/TriangleInequality.lean,Mathlib/MeasureTheory/Integral/IntegrableOn.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/Basic.lean 14 28 ['astrainfinita', 'bryangingechen', 'github-actions', 'grunweg', 'kbuzzard', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'mathlib-bors', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'sgouezel'] grunweg
assignee:grunweg
226-14517
7 months ago
234-52071
234 days ago
0-19882
5 hours
28925 grunweg
author:grunweg
 chore: remove `linear_combination'` tactic When `linear_combination` was refactored in #15899, the old code was kept as the `linear_combination'` tactic, for easier migration. The consensus of the zulip discussion ([#mathlib4 > Narrowing the scope of `linear_combination` @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Narrowing.20the.20scope.20of.20.60linear_combination.60/near/470237816)) was to wait, and "revisit this once people have experienced the various tactics in practice". One year later, the old tactic has almost no uses: it is unused in mathlib; [searching on github](https://github.com/search?q=linear_combination%27%20path%3A*.lean&type=code) yields 37 hits --- all of which are in various forks of mathlib. Thus, removing this tactic seems appropriate. --- Do not merge before the zulip discussion has concluded! [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict file-removed awaiting-zulip 0/564 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/LinearCombination'.lean,Mathlib/Tactic/Linter/UnusedTactic.lean,MathlibTest/linear_combination'.lean 5 4 ['euprunin', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] nobody
182-78127
6 months ago
234-23524
234 days ago
0-1
1 second
30150 imbrem
author:imbrem
 feat(CategoryTheory/Monoidal): to_additive for MonoidalCategory Add `AddMonoidalCategory`, the additive version of `MonoidalCategory`. To get this to work, I needed to _remove_ the `to_additive` attributes in `Discrete.lean`, since existing code relies on the `AddMonoid M → MonoidalCategory M` instance. For now, we simply implement the additive variants by hand instead. --- As discussed in #28718; I added an `AddMonoidalCategory` struct and tagged `MonoidalCategory` with `to_additive`, along with the lemmas in `Category.lean`. I think this is the right approach, since under this framework the "correct" additive version of `Discrete.lean` would be mapping an `AddMonoid` to an `AddMonoidalCategory`. Next steps would be to: - Make `monoidal_coherence` and `coherence` support `AddMonoidalCategory` - Add `CocartesianMonoidalCategory` extending `AddMonoidalCategory` [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory large-import new-contributor merge-conflict awaiting-zulip t-meta 444/125 Mathlib/CategoryTheory/Monoidal/Category.lean,Mathlib/CategoryTheory/Monoidal/Discrete.lean,Mathlib/Tactic/ToAdditive/GuessName.lean 3 22 ['JovanGerb', 'YaelDillies', 'github-actions', 'imbrem', 'mathlib4-merge-conflict-bot'] nobody
155-2601
5 months ago
194-67667
194 days ago
1-160
1 day
15651 TpmKranz
author:TpmKranz
 feat(Computability/NFA): operations for Thompson's construction Lays the groundwork for a proof of equivalence of RE and NFA, w.r.t. described language. Actual connection to REs comes later, after the groundwork for the opposite direction has been laid. Third chunk of #12648 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-computability merge-conflict awaiting-author awaiting-zulip 307/5 Mathlib/Computability/NFA.lean 1 27 ['TpmKranz', 'YaelDillies', 'dupuisf', 'github-actions', 'leanprover-community-bot-assistant', 'meithecatte', 'rudynicolop'] nobody
150-19733
4 months ago
569-47121
569 days ago
45-84611
45 days
15649 TpmKranz
author:TpmKranz
 feat(Computability): introduce Generalised NFA as bridge to Regular Expression Lays the groundwork for a proof of equivalence of NFA and RE, w.r.t. described language. Actual connection to NFA comes later, after the groundwork for the opposite direction has been laid. Second chunk of #12648 --- - [x] depends on: #15647 [Data.FinEnum.Option unchanged since then] [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-computability merge-conflict awaiting-author awaiting-zulip 298/0 Mathlib.lean,Mathlib/Computability/GNFA.lean,Mathlib/Computability/Language.lean,Mathlib/Computability/RegularExpressions.lean,docs/references.bib 5 7 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'meithecatte', 'trivial1711'] nobody
149-35974
4 months ago
494-85904
494 days ago
23-54870
23 days
20648 anthonyde
author:anthonyde
 feat: formalize regular expression -> εNFA The file `Computability/RegularExpressionsToEpsilonNFA.lean` contains a formal definition of Thompson's method for constructing an `εNFA` from a `RegularExpression` and a proof of its correctness. --- - [x] depends on: #20644 - [x] depends on: #20645 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability awaiting-zulip new-contributor 490/0 Mathlib.lean,Mathlib/Computability/RegularExpressionsToEpsilonNFA.lean,docs/references.bib 3 7 ['anthonyde', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'meithecatte', 'qawbecrdtey'] nobody
148-73142
4 months ago
346-19671
346 days ago
75-77754
75 days
11800 JADekker
author:JADekker
 feat: KappaLindelöf spaces Define KappaLindelöf spaces by following the first one-third of the API for Lindelöf spaces. The remainder will be added in a future PR. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt merge-conflict t-topology awaiting-zulip 301/2 Mathlib.lean,Mathlib/Topology/Compactness/KappaLindelof.lean,Mathlib/Topology/Compactness/Lindelof.lean 3 38 ['ADedecker', 'JADekker', 'PatrickMassot', 'StevenClontz', 'adomani', 'github-actions', 'grunweg', 'kim-em', 'urkud'] nobody
148-45008
4 months ago
623-65290
623 days ago
123-25636
123 days
30668 astrainfinita
author:astrainfinita
 feat: `QuotType` This typeclass is primarily for use by type synonyms of `Quot` and `Quotient`. Using `QuotType` API for type synonyms of `Quot` and `Quotient` will avoid defeq abuse caused by directly using `Quot` and `Quotient` APIs. This PR also adds some typeclasses to support different ways to find the quotient map that should be used. See the documentation comments of these typeclasses for examples of usage. --- It's not a typical design to use these auxiliary typeclasses and term elaborators, but I haven't found a better way to support these notations. Some of the naming may need to be discussed. For example: - `⟦·⟧` is currently called `mkQ` in names. This distinguishes it from other `.mk`s and makes it possible to write the quotient map as `mkQ` `mkQ'` ~~`mkQ_ h`~~. But this will also require changing the old lemma names. - It would be helpful if the names of new type classes explained their functionality better. [Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/migrate.20to.20.60QuotLike.60.20API) This PR continues the work from #16421. Original PR: https://github.com/leanprover-community/mathlib4/pull/16421 RFC t-data awaiting-zulip 629/0 Mathlib.lean,Mathlib/Data/QuotType.lean,MathlibTest/QuotType.lean 3 20 ['YaelDillies', 'astrainfinita', 'github-actions', 'mathlib4-merge-conflict-bot', 'plp127', 'vihdzp'] nobody
127-26854
4 months ago
179-82107
179 days ago
0-81
1 minute
33368 urkud
author:urkud
 feat: define `Complex.UnitDisc.shift` Also review the existing API UPD: I'm going to define a `PSL(2, Real)` action instead. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis awaiting-zulip merge-conflict 273/39 Mathlib.lean,Mathlib/Analysis/Complex/UnitDisc/Basic.lean,Mathlib/Analysis/Complex/UnitDisc/Shift.lean 3 7 ['github-actions', 'j-loreaux', 'mathlib4-merge-conflict-bot', 'sgouezel', 'urkud'] j-loreaux
assignee:j-loreaux
99-81567
3 months ago
100-41900
100 days ago
7-33574
7 days
32828 Hagb
author:Hagb
 feat(Algebra/Order/Group/Defs): add `IsOrderedAddMonoid.toIsOrderedCancelAddMonoid'` It is similar to `IsOrderedAddMonoid.toIsOrderedCancelAddMonoid`, while with different hypotheses. The conclusion `IsOrderedCancelMonoid α` on `IsOrderedAddMonoid.toIsOrderedCancelAddMonoid` still holds when the hypothesis `CommGroup α` is weakened to `CancelCommMonoid α` while `PartialOrder α` is strengthened to `LinearOrder α`. --- [`IsOrderedAddMonoid.toIsOrderedCancelAddMonoid`](https://leanprover-community.github.io/mathlib4_docs/find/?pattern=IsOrderedAddMonoid.toIsOrderedCancelAddMonoid#doc) and `IsOrderedAddMonoid.toIsOrderedCancelAddMonoid'`: https://github.com/leanprover-community/mathlib4/blob/97f78b1a4311fed1844b94f1c069219a48a098e1/Mathlib/Algebra/Order/Group/Defs.lean#L52-L62 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip t-algebra
label:t-algebra$
 4/0 Mathlib/Algebra/Order/Group/Defs.lean 1 8 ['Garmelon', 'Vierkantor', 'artie2000', 'github-actions', 'leanprover-radar'] eric-wieser
assignee:eric-wieser
84-44002
2 months ago
84-44002
84 days ago
40-42357
40 days
33031 chiyunhsu
author:chiyunhsu
 feat(Combinatorics/Enumerative/Partition): add combinatorial proof of Euler's partition theorem The new file EulerComb.lean contains the combinatorial proof of Euler's partition theorem. The analytic proof of the theorem and its generalization of Glaisher's Theorem has already been formalized in [Glaisher.lean](https://github.com/leanprover-community/mathlib4/blob/master/Mathlib/Combinatorics/Enumerative/Partition/Glaisher.lean). The generalization of the combinatorial proof from this file to Glaisher's Theorem is within reach. --- Zulip discussion: [#mathlib4 > Glaisher’s Bijection on integer partitions](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Glaisher.E2.80.99s.20Bijection.20on.20integer.20partitions/with/570808111) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor awaiting-zulip 531/0 Mathlib.lean,Mathlib/Combinatorics/Enumerative/Partition/EulerComb.lean 2 5 ['chiyunhsu', 'github-actions', 'tb65536', 'vihdzp'] b-mehta
assignee:b-mehta
77-48820
2 months ago
77-48820
77 days ago
42-22427
42 days
32742 LTolDe
author:LTolDe
 feat(MeasureTheory/Constructions/Polish/Basic): add class SuslinSpace add new class `SuslinSpace` for a topological space that is an analytic set in itself This will be useful to prove the **Effros Theorem**, see [zulip thread](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Effros.20Theorem/with/558712441). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor awaiting-zulip t-measure-probability 4/0 Mathlib/MeasureTheory/Constructions/Polish/Basic.lean 1 9 ['ADedecker', 'LTolDe', 'dupuisf', 'github-actions', 'jcommelin'] PatrickMassot
assignee:PatrickMassot
74-61230
2 months ago
100-45362
100 days ago
11-7507
11 days
34720 Paul-Lez
author:Paul-Lez
 feat(RingTheory/PowerSeries/Composition): define composition of power series This PR defines the composition of two power series, and adds various pieces of API lemmas (this is mostly fixing up and upstreaming code from [this repo](https://github.com/rmhi/formal_deriv)). This is the first of a series of PRs upstreaming work that was done at the CFT workshop in Oxford last summer, working towards proving some results about the `exp` and `log` power series (and their composition!), and constructing the isomorphism $(\mathfrak{m}_K ^ n, +) \cong (1 + \mathfrak{m}_K ^ n, \times)$ for sufficiently large $n$, where $K$ is a characteristic zero local field. Co-authored-by: Richard Hill Co-authored-by: Calle Sönne --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory awaiting-zulip 844/0 Mathlib.lean,Mathlib/RingTheory/PowerSeries/Composition.lean 2 3 ['Paul-Lez', 'github-actions', 'vihdzp'] nobody
66-20839
2 months ago
73-59159
73 days ago
0-10
10 seconds
33441 dupuisf
author:dupuisf
 feat: add `LawfulInv` class for types with an inverse that behaves like `Ring.inverse` This PR introduces a new typeclass `LawfulInv` for types which have an `Inv` instance that is equal to zero on non-invertible elements. This is meant to replace `Ring.inverse`. The current plan is to do this refactor in several steps: 1. This PR, which only introduces the class and adds instances for matrices and continuous linear maps. 2. Add instances for all C*-algebras, and make `CStarAlgebra` extend this. 3. Deprecate `Ring.inverse`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip t-algebra merge-conflict
label:t-algebra$
 185/27 Mathlib/Algebra/GroupWithZero/Defs.lean,Mathlib/Algebra/GroupWithZero/Invertible.lean,Mathlib/Algebra/GroupWithZero/Units/Basic.lean,Mathlib/LinearAlgebra/Matrix/NonsingularInverse.lean,Mathlib/LinearAlgebra/Matrix/PosDef.lean,Mathlib/RingTheory/DividedPowers/Padic.lean,Mathlib/Topology/Algebra/Module/Equiv.lean 7 35 ['dupuisf', 'eric-wieser', 'github-actions', 'j-loreaux', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'plp127'] nobody
57-79578
1 month ago
86-26313
86 days ago
7-54141
7 days
26299 adomani
author:adomani
 perf: the `whitespace` linter only acts on modified files Introduces an `IO.Ref` to allow the `commandStart` linter to only run on files that git considers modified with respect to `master`. The linter is also active on files that have had some error, as these are likely being modified! The PR should also mitigate the speed-up that the linter introduced: [#mathlib4 > A whitespace linter @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/A.20whitespace.20linter/near/525091877) Assuming that this goes well, a similar mechanism could be applied to several linters that do not need to run on all code, just on the modified code. Implementation detail: the linter is currently either on or off in "whole" files. It may be also a future development to make this more granular and only run the linter on "modifed commands in modified files", but this is not currently the plan for this modification! --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter awaiting-zulip awaiting-author 55/7 Mathlib/Tactic/Linter/Whitespace.lean 1 19 ['adomani', 'eric-wieser', 'github-actions', 'grunweg', 'joneugster', 'kim-em', 'leanprover-bot', 'leanprover-radar', 'mathlib-bors', 'mathlib4-merge-conflict-bot'] grunweg
assignee:grunweg
57-72004
1 month ago
230-68322
230 days ago
66-73556
66 days
20238 maemre
author:maemre
 feat(Computability/DFA): Closure of regular languages under some set operations This shows that regular languages are closed under complement and intersection by constructing DFAs for them. --- Closure under all other operations will be proved when someone adds the proof for DFA<->regular expression equivalence, so they are not part of this PR. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-computability merge-conflict awaiting-author awaiting-zulip 159/0 Mathlib/Computability/DFA.lean,Mathlib/Computability/Language.lean 2 60 ['EtienneC30', 'YaelDillies', 'github-actions', 'maemre', 'mathlib4-merge-conflict-bot', 'meithecatte', 'urkud'] nobody
49-66376
1 month ago
395-44315
395 days ago
48-67492
48 days
22361 rudynicolop
author:rudynicolop
 feat(Computability/NFA): nfa closure properties Add the closure properties union, intersection and reversal for NFA. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-computability merge-conflict awaiting-author awaiting-zulip 218/2 Mathlib/Computability/Language.lean,Mathlib/Computability/NFA.lean 2 91 ['EtienneC30', 'b-mehta', 'ctchou', 'github-actions', 'leanprover-community-bot-assistant', 'meithecatte', 'rudynicolop'] nobody
49-66360
1 month ago
346-48254
346 days ago
39-61332
39 days
23929 meithecatte
author:meithecatte
 feat(Computability/NFA): improve bound on pumping lemma --- - [x] depends on: #25321 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability awaiting-zulip new-contributor awaiting-author 101/10 Mathlib/Computability/EpsilonNFA.lean,Mathlib/Computability/NFA.lean 2 42 ['YaelDillies', 'dagurtomas', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'meithecatte'] nobody
48-86389
1 month ago
313-29288
313 days ago
34-10092
34 days
35524 grunweg
author:grunweg
 feat: text-based linter against \t followed by tactic mode Wait for the zulip discussion to converge. **If** there is consensus in favour of this change, summarise the motivation here. [zulip discuss](https://leanprover.zulipchat.com/#narrow/channel/345428-mathlib-reviewers/topic/proposal.3A.20no.20more.20use.20of.20.60.E2.96.B8.60.20in.20Mathlib.3F/with/574680826) --- There are currently 80 remaining exceptions in mathlib: ideally, these would get fixed before merging this. Works best when combined with #35523. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter awaiting-zulip merge-conflict 23/2 Mathlib/Tactic/Linter/TextBased.lean 1 5 ['github-actions', 'grunweg', 'joneugster', 'mathlib-merge-conflicts', 'vihdzp'] nobody
30-17741
30 days ago
56-65303
56 days ago
0-187
3 minutes
32608 PrParadoxy
author:PrParadoxy
 feat(LinearAlgebra/PiTensorProduct): API for PiTensorProducts indexed by sets This PR addresses a TODO item in LinearAlgebra/PiTensorProduct.lean: * API for the various ways ι can be split into subsets; connect this with the binary tensor product -- specifically by describing tensors of type ⨂ (i : S), M i, for S : Set ι. Our primary motivation is to formalise the notion of "restricted tensor products". This will be the content of a follow-up PR. Beyond that, the Set API is natural in contexts where the index type has an independent interpretation. An example is quantum physics, where ι ranges over distinguishable degrees of freedom, and where its is common practice to annotate objects by the set of indices they are defined on. --- Stub file with preliminary definition of the restricted tensor product as a direct limit of tensors indexed by finite subsets of an index type: https://github.com/PrParadoxy/mathlib4/blob/restricted-stub/Mathlib/LinearAlgebra/PiTensorProduct/Restricted.lean --- - [x] depends on: #32598 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor awaiting-zulip t-algebra
label:t-algebra$
 300/2 Mathlib.lean,Mathlib/LinearAlgebra/PiTensorProduct.lean,Mathlib/LinearAlgebra/PiTensorProduct/Set.lean 3 28 ['PrParadoxy', 'dagurtomas', 'eric-wieser', 'github-actions', 'goliath-klein', 'leanprover-radar', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
29-39136
29 days ago
115-38327
115 days ago
10-66980
10 days
36890 vihdzp
author:vihdzp
 chore(SetTheory): `le_mul_left` → `le_mul_of_pos_left` The new theorem names/statements match [`Nat.le_mul_of_pos_left`](https://leanprover-community.github.io/mathlib4_docs/Init/Data/Nat/Lemmas.html#Nat.le_mul_of_pos_left). The cardinal one has also been moved to an earlier file. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory awaiting-zulip merge-conflict 28/23 Mathlib/SetTheory/Cardinal/Arithmetic.lean,Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/Cardinal/Free.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/Exponential.lean,Mathlib/SetTheory/Ordinal/Notation.lean 6 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
24-76545
24 days ago
27-63285
27 days ago
0-10825
3 hours
34077 kbuzzard
author:kbuzzard
 perf: increase priority of instSMulOfMul #31040 deprecated `Mul.toSMul` in place of the core instance `instSMulOfMul`, which is at a lowered priority of 910. This PR undeprecates it and makes it a higher priority instance (1100) which seems better for mathlib. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) This PR follows the philosophy seen in Mathlib's `Algebra.id : Algebra R R`, which also has raised priority. The idea is the same as `Algebra.id`: if you're looking for an instance of `Algebra R S` with R not equal to S then `Algebra.id` is extremely likely to fail quickly in practice, and if you're looking for an instance of `Algebra R R` then `Algebra.id` is unambiguously the right answer so should be tried ASAP. However the instance is defined so early in mathlib that in in practice it is tried last unless the priority is raised. The same philosophy holds here; if you're looking for an instance of `SMul X X` then you absolutely want to try `Mul.toSMul` first and if you're looking for an instance of `SMul X Y` with Y not X then `Mul.toSMul` will in practice be quick to fail. This PR was inspired by #33908 (another "this should be quick to fail and if it fits then it's almost certainly what we want" prio change) which made an instance of `IsScalarTower R A A` high priority and gave a performance boost. This PR also gives a performance boost. Note that the performance in #31040 looks very bad but the radar output is incorrect; there was a hardware change between the two runs. In fact #31040 produced no changes in profiling, as one might expect. I don't know the correct way to change the priority of a core instance in mathlib, and I didn't know if just changing the priority naively would work repo-wide rather than just file-wide, which was why this PR introduces a second instance. Zulip discussion at [#mathlib4 > priority hacks](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/priority.20hacks/with/574353616) t-algebra awaiting-zulip
label:t-algebra$
 3/9 Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/Group/Action/Units.lean 2 26 ['alreadydone', 'github-actions', 'kbuzzard', 'leanprover-radar', 'mathlib-merge-conflicts'] jcommelin
assignee:jcommelin
21-19834
21 days ago
57-73329
57 days ago
0-58585
16 hours
35578 Shreyas4991
author:Shreyas4991
 fix: writer monad should use an additive logging type The Writer monad's w type is supposed to be additive, not multiplicative. This is how it is conceptually used in Haskell (as a logging type). Haskell uses `Monoid` because it doesn't make a distinction between `AddMonoid` and `Monoid`. [#mathlib4 > Writer should use an additive monoid @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Writer.20should.20use.20an.20additive.20monoid/near/574990415) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data awaiting-zulip merge-conflict 10/10 Mathlib/Control/Monad/Cont.lean,Mathlib/Control/Monad/Writer.lean 2 5 ['Shreyas4991', 'eric-wieser', 'github-actions', 'mathlib-merge-conflicts'] nobody
21-620
21 days ago
55-21138
55 days ago
0-18707
5 hours
36087 matthewjasper
author:matthewjasper
 chore: fix diamonds for Real/Complex Algebra instances Unfold or make `implicit_reducible` some definitions used to define `Algebra ℝ ℂ` . This should allow reducing use of `set_option backward.isDefEq.respectTransparency false`. --- - [x] depends on: #36694 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip 24/19 Mathlib/Algebra/Algebra/Defs.lean,Mathlib/Algebra/Algebra/Pi.lean,Mathlib/Algebra/Algebra/Prod.lean,Mathlib/Analysis/Complex/Basic.lean,Mathlib/Data/Complex/Basic.lean,Mathlib/LinearAlgebra/Complex/Module.lean,MathlibTest/instance_diamonds.lean 7 8 ['eric-wieser', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'matthewjasper'] eric-wieser
assignee:eric-wieser
18-20940
18 days ago
19-36296
19 days ago
11-84307
11 days
30750 SnirBroshi
author:SnirBroshi
 feat(Data/Quot): `toSet` and `equivClassOf` Define `toSet` which gets the set corresponding to an element of a quotient, and `equivClassOf` which gets the equivalence class of an element under a quotient. --- I found these definitions helpful when working with quotients, specifically `ConnectedComponents` of a `TopologicalSpace`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data awaiting-author awaiting-zulip 162/0 Mathlib/Data/Quot.lean,Mathlib/Data/Set/Image.lean,Mathlib/Data/SetLike/Basic.lean,Mathlib/Data/Setoid/Basic.lean 4 8 ['SnirBroshi', 'TwoFX', 'eric-wieser', 'github-actions', 'linesthatinterlace', 'mathlib-merge-conflicts'] TwoFX
assignee:TwoFX
2-58529
2 days ago
140-71930
140 days ago
35-84279
35 days
36439 xgenereux
author:xgenereux
 feat(Algebra/Adjoin): CoeDep instances for Algebra.adjoin on singletons It is a common occurrence that I need to consider an element `x` or some polynomial evaluated in `x`, `p.eval x` as an element of `Algebra.adjoin R {x}`. This makes it so that we can write - `(x : adjoin R {x})` instead of `⟨x, self_mem_adjoin_singleton A x⟩` - `(p.eval x : adjoin R {x})` instead of `⟨p.aeval x, aeval_mem_adjoin_singleton A x⟩` This is particularly useful when we need to write the type anyways, so that we need not to write `(⟨p.aeval x, aeval_mem_adjoin_singleton A x⟩ : adjoin R {x})` anymore. Co-authored-by: María Inés de Frutos Fernández <[mariaines.dff@gmail.com](mailto:mariaines.dff@gmail.com)> --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory t-algebra awaiting-zulip
label:t-algebra$
 9/3 Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/RingTheory/Adjoin/Polynomial/Basic.lean 2 14 ['Vierkantor', 'chrisflav', 'github-actions', 'jcommelin', 'mathlib-merge-conflicts', 'xgenereux'] jcommelin
assignee:jcommelin
0-46515
12 hours ago
1-76907
1 day ago
35-37193
35 days

PRs with just a merge conflict

Number Author Title Description Labels +/- Modified files (first 100) 📝 💬 All users who commented or reviewed Assignee(s) Updated Last status change total time in review
10721 urkud
author:urkud
 feat(Order/FunLike): define `PointwiseLE` - introduce a mixin class `DFunLike.PointwiseLE`, use it to define `DFunLike.instPartialOrder`; - add a generic `DFunLike.orderEmbeddingCoe` - add `DFunLike.PointwiseLE` instances here and there. With this refactor and #13022, I'm going to generalize lemmas like `MeasureTheory.ae_mono` to `OuterMeasureClass`. --- - [x] depends on: #12983 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-order t-logic 123/50 Mathlib.lean,Mathlib/Algebra/Order/Hom/Ring.lean,Mathlib/Data/DFinsupp/Order.lean,Mathlib/Data/Finsupp/Order.lean,Mathlib/Data/FunLike/Basic.lean,Mathlib/Dynamics/Circle/RotationNumber/TranslationNumber.lean,Mathlib/GroupTheory/Congruence.lean,Mathlib/Order/FunLike.lean,Mathlib/Order/Heyting/Hom.lean,Mathlib/Order/Hom/Basic.lean,Mathlib/Order/Hom/Bounded.lean,Mathlib/Order/Hom/CompleteLattice.lean,Mathlib/Topology/Order/Hom/Basic.lean 13 48 ['YaelDillies', 'dupuisf', 'leanprover-community-mathlib4-bot', 'urkud'] nobody
624-70988
1 year ago
674-49390
674 days ago
64-12984
64 days
8788 FMLJohn
author:FMLJohn
 feat(Algebra/Module/GradeZeroModule): if `A` is a graded semiring and `M` is a graded `A`-module, then each grade of `M` is a module over the 0-th grade of `A`. --- - [ ] depends on: #8187 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 237/4 Mathlib.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/GradedMonoid.lean,Mathlib/Algebra/Module/GradeZeroModule.lean,Mathlib/RingTheory/GradedAlgebra/Basic.lean,Mathlib/RingTheory/GradedAlgebra/Noetherian.lean 6 4 ['FMLJohn', 'github-actions', 'leanprover-community-mathlib4-bot'] nobody
624-70987
1 year ago
864-60883
864 days ago
1-57831
1 day
7875 astrainfinita
author:astrainfinita
 chore: make `SMulCommClass A A B` and `SMulCommClass A B B` higher priority --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict slow-typeclass-synthesis t-algebra
label:t-algebra$
 54/48 Mathlib/Algebra/Algebra/Basic.lean,Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/DirectSum/Algebra.lean,Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/Group/Subgroup/Actions.lean,Mathlib/Algebra/Lie/NonUnitalNonAssocAlgebra.lean,Mathlib/Algebra/Module/LinearMap/End.lean,Mathlib/Algebra/MonoidAlgebra/Basic.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/Ring/CentroidHom.lean,Mathlib/Algebra/Ring/Subring/Basic.lean,Mathlib/Algebra/Ring/Subsemiring/Basic.lean,Mathlib/Algebra/Star/NonUnitalSubalgebra.lean,Mathlib/Analysis/Complex/UnitDisc/Basic.lean,Mathlib/Analysis/NormedSpace/lpSpace.lean,Mathlib/Data/Matrix/Basic.lean,Mathlib/GroupTheory/GroupAction/Prod.lean,Mathlib/GroupTheory/GroupAction/Ring.lean,Mathlib/GroupTheory/GroupAction/SubMulAction.lean,Mathlib/GroupTheory/MonoidLocalization.lean,Mathlib/GroupTheory/Submonoid/Center.lean,Mathlib/LinearAlgebra/PiTensorProduct.lean,Mathlib/RingTheory/Ideal/Quotient.lean,Mathlib/RingTheory/TensorProduct/Basic.lean,Mathlib/Topology/ContinuousFunction/ContinuousMapZero.lean,Mathlib/Topology/ContinuousFunction/StoneWeierstrass.lean,Mathlib/Topology/ContinuousFunction/ZeroAtInfty.lean 27 15 ['Parcly-Taxel', 'astrainfinita', 'jcommelin', 'leanprover-bot'] nobody
624-70986
1 year ago
679-1094
679 days ago
1-47913
1 day
6491 eric-wieser
author:eric-wieser
 chore(Mathlib/Algebra/Hom/GroupAction): add `SMulHomClass.comp_smul` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 24/10 Mathlib/Algebra/Hom/GroupAction.lean 1 0 [] nobody
624-70985
1 year ago
896-56985
896 days ago
83-76369
83 days
10629 madvorak
author:madvorak
 feat: List.cons_sublist_append_iff_right --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 11/0 Mathlib/Data/List/Basic.lean 1 1 ['eric-wieser'] nobody
610-64530
1 year ago
736-73367
736 days ago
53-73442
53 days
13791 digama0
author:digama0
 refactor: Primrec and Partrec General cleanup of the `Primrec` and `Partrec` files, to better adjust to lean 4 things. The main user-visible change is that `Primrec₂` is no longer a `def` but an `abbrev`, because it was causing inference issues in lean 4. I also removed all the nonterminal `simp`s in `PartrecCode.lean`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability tech debt 585/778 Mathlib/Computability/Ackermann.lean,Mathlib/Computability/Halting.lean,Mathlib/Computability/Partrec.lean,Mathlib/Computability/PartrecCode.lean,Mathlib/Computability/Primrec.lean 5 2 ['github-actions', 'grunweg'] nobody
606-27375
1 year ago
670-16961
670 days ago
1-84718
1 day
12418 rosborn
author:rosborn
 style: replace preimage_val with ↓∩ notation --- This is a rough draft of what the new `↓∩` notation would look like within mathlib. I believe this is an improvement in clarity and would like to have `↓∩` as a standard notation (along with `''`, `⁻¹'`, `↑`, etc...). As `↓∩` is specialized for `Set`s, I have only changed `preimage_val` when the left-hand side of `↓∩` is a `Set`. The introduction of the `↓∩` notation to Data.Set.Image is temporary as it isn't possible to import Data.Set.Subset directly. If we want `↓∩` unscoped, where would be the best place to define it? An option is Data.Set.Defs, but the notation cannot be defined without additional imports as the file does not import `notation3`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 56/61 Mathlib/Analysis/InnerProductSpace/Projection.lean,Mathlib/Data/Set/Function.lean,Mathlib/Data/Set/Image.lean,Mathlib/Data/Set/Subset.lean,Mathlib/MeasureTheory/Constructions/Polish.lean,Mathlib/MeasureTheory/MeasurableSpace/Basic.lean,Mathlib/MeasureTheory/Measure/Restrict.lean,Mathlib/Order/UpperLower/Basic.lean,Mathlib/Topology/Bases.lean,Mathlib/Topology/Clopen.lean,Mathlib/Topology/Connected/Basic.lean,Mathlib/Topology/Connected/PathConnected.lean,Mathlib/Topology/Constructions.lean,Mathlib/Topology/ContinuousOn.lean,Mathlib/Topology/LocalAtTarget.lean,Mathlib/Topology/LocallyConstant/Basic.lean,Mathlib/Topology/Separation.lean,Mathlib/Topology/Sober.lean 18 3 ['grunweg', 'rosborn'] nobody
606-27133
1 year ago
692-37117
692 days ago
29-50022
29 days
12751 Command-Master
author:Command-Master
 feat: add lemmas for Nat/Bits, Nat/Bitwise and Nat/Size Remove `@[simp]` from `Nat.bit_false` and `Nat.bit_true`, as `bit0` and `bit1` are deprecated, and add some lemmas to `Bits`, `Bitwise` and `Size`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data new-contributor 66/7 Mathlib/Data/Nat/Bits.lean,Mathlib/Data/Nat/Bitwise.lean,Mathlib/Data/Nat/Multiplicity.lean,Mathlib/Data/Nat/Size.lean 4 26 ['Command-Master', 'Rida-Hamadani', 'Ruben-VandeVelde', 'YaelDillies', 'github-actions', 'jcommelin'] nobody
605-48287
1 year ago
640-54509
640 days ago
56-40668
56 days
10350 Shamrock-Frost
author:Shamrock-Frost
 feat(Data/Setoid): add the operations of taking the equivalence class of an element and of saturating a set wrt an equivalence relation I'm open to suggestions about changing the name "saturate", someone on zulip rightly pointed out this is a very overloaded term in math. That said, I think it's unlikely to cause confusion and that there's only one reasonable interpretation in the context of setoids. --- - [x] depends on: #10347 - [x] depends on: #10348 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 169/3 Mathlib/Data/Setoid/Basic.lean,Mathlib/Data/Setoid/Partition.lean,Mathlib/Order/Closure.lean 3 1 ['leanprover-community-mathlib4-bot'] nobody
603-50561
1 year ago
722-42189
722 days ago
19-74546
19 days
17127 astrainfinita
author:astrainfinita
 chore: remove global `Quotient.mk` `⟦·⟧` notation --- Merge this PR when we are ready to migrate to `QuotLike` API (#16421). [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 137/2 Counterexamples/Pseudoelement.lean,Mathlib/Algebra/Associated/Basic.lean,Mathlib/Algebra/BigOperators/Group/Finset.lean,Mathlib/Algebra/Group/Conj.lean,Mathlib/Algebra/GroupWithZero/NonZeroDivisors.lean,Mathlib/Algebra/Order/CauSeq/Completion.lean,Mathlib/Algebra/Quandle.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Projective.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/Basic.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/FundamentalGroup.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/InducedMaps.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/Product.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/SimplyConnected.lean,Mathlib/CategoryTheory/Abelian/Pseudoelements.lean,Mathlib/CategoryTheory/Limits/Shapes/SingleObj.lean,Mathlib/CategoryTheory/Monoidal/Free/Basic.lean,Mathlib/CategoryTheory/Monoidal/Free/Coherence.lean,Mathlib/CategoryTheory/Skeletal.lean,Mathlib/Data/Finset/Card.lean,Mathlib/Data/Fintype/List.lean,Mathlib/Data/Fintype/Quotient.lean,Mathlib/Data/Multiset/Basic.lean,Mathlib/Data/QPF/Multivariate/Constructions/Fix.lean,Mathlib/Data/QPF/Univariate/Basic.lean,Mathlib/Data/Quot.lean,Mathlib/Data/Real/Basic.lean,Mathlib/Data/Set/Finite.lean,Mathlib/Data/Set/Image.lean,Mathlib/Data/Setoid/Basic.lean,Mathlib/GroupTheory/GroupAction/Basic.lean,Mathlib/GroupTheory/GroupAction/Quotient.lean,Mathlib/LinearAlgebra/Dual.lean,Mathlib/LinearAlgebra/Ray.lean,Mathlib/Logic/Encodable/Basic.lean,Mathlib/Logic/Equiv/Basic.lean,Mathlib/ModelTheory/DirectLimit.lean,Mathlib/ModelTheory/Fraisse.lean,Mathlib/ModelTheory/Quotients.lean,Mathlib/NumberTheory/NumberField/CanonicalEmbedding/FundamentalCone.lean,Mathlib/NumberTheory/NumberField/Embeddings.lean,Mathlib/NumberTheory/NumberField/Units/DirichletTheorem.lean,Mathlib/NumberTheory/Padics/PadicIntegers.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/Order/RelIso/Basic.lean,Mathlib/RepresentationTheory/Action/Concrete.lean,Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/Cardinal/Ordinal.lean,Mathlib/SetTheory/Game/Basic.lean,Mathlib/SetTheory/Game/Birthday.lean,Mathlib/SetTheory/Game/Impartial.lean,Mathlib/SetTheory/Game/Ordinal.lean,Mathlib/SetTheory/Game/State.lean,Mathlib/SetTheory/Lists.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/Basic.lean,Mathlib/SetTheory/Surreal/Basic.lean,Mathlib/SetTheory/Surreal/Dyadic.lean,Mathlib/SetTheory/Surreal/Multiplication.lean,Mathlib/SetTheory/ZFC/Basic.lean,Mathlib/SetTheory/ZFC/Rank.lean,Mathlib/Topology/Connected/PathConnected.lean,Mathlib/Topology/Homotopy/HomotopyGroup.lean,Mathlib/Topology/Homotopy/Path.lean,Mathlib/Topology/Homotopy/Product.lean,Mathlib/Topology/MetricSpace/GromovHausdorff.lean,Mathlib/Topology/UniformSpace/Separation.lean,test/interactiveUnfold.lean 68 1 ['github-actions'] nobody
563-85626
1 year ago
563-85626
563 days ago
4-72805
4 days
14598 Command-Master
author:Command-Master
 chore: add typeclasses to unify various `add_top`, `add_eq_top`, etc. Add the four typeclasses `IsTopAbsorbing`, `IsBotAbsorbing`, `NoTopSum`, `NoBotSum`, as additive equivalents for `MulZeroClass` and `NoZeroDivisors`. Add instances of these for `ENNReal`, `WithTop α`, `WithBot α`, `PUnit`, `EReal`, `PartENat`, `Measure`, `Interval` and `Filter`. Also split `Algebra/Order/AddGroupWithTop` to `Algebra/Order/Group/WithTop` and `Algebra/Order/Monoid/WithTop` --- Previous usages of lemmas with quantified names like `WithTop.add_top` have to be changed to just `add_top`. `add_lt_top` is `@[simp]`, in accordance with `ENNReal.add_lt_top` being `@[simp]`. This affects `WithTop.add_lt_top` which previously hadn't been `@[simp]`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra t-order new-contributor
label:t-algebra$
 264/195 Archive/Wiedijk100Theorems/BallotProblem.lean,Mathlib.lean,Mathlib/Algebra/Order/Group/WithTop.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/Interval/Basic.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Basic.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Defs.lean,Mathlib/Algebra/Order/Monoid/Unbundled/WithTop.lean,Mathlib/Algebra/Order/Monoid/WithTop.lean,Mathlib/Algebra/PUnitInstances/Order.lean,Mathlib/Algebra/Polynomial/Degree/Definitions.lean,Mathlib/Algebra/Polynomial/Monic.lean,Mathlib/Algebra/Tropical/Basic.lean,Mathlib/Analysis/Analytic/Meromorphic.lean,Mathlib/Analysis/Normed/Lp/ProdLp.lean,Mathlib/Analysis/NormedSpace/ENorm.lean,Mathlib/Analysis/SpecialFunctions/JapaneseBracket.lean,Mathlib/Analysis/SpecialFunctions/Log/ENNRealLog.lean,Mathlib/Data/ENNReal/Operations.lean,Mathlib/Data/ENat/Basic.lean,Mathlib/Data/Nat/PartENat.lean,Mathlib/Data/Nat/WithBot.lean,Mathlib/Data/Real/EReal.lean,Mathlib/LinearAlgebra/Lagrange.lean,Mathlib/MeasureTheory/Covering/Differentiation.lean,Mathlib/MeasureTheory/Decomposition/Lebesgue.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/CondexpL1.lean,Mathlib/MeasureTheory/Function/Jacobian.lean,Mathlib/MeasureTheory/Function/L1Space.lean,Mathlib/MeasureTheory/Function/L2Space.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Function/LpSeminorm/TriangleInequality.lean,Mathlib/MeasureTheory/Function/LpSpace.lean,Mathlib/MeasureTheory/Function/StronglyMeasurable/Basic.lean,Mathlib/MeasureTheory/Function/UniformIntegrable.lean,Mathlib/MeasureTheory/Integral/Bochner.lean,Mathlib/MeasureTheory/Integral/MeanInequalities.lean,Mathlib/MeasureTheory/Integral/SetIntegral.lean,Mathlib/MeasureTheory/Integral/VitaliCaratheodory.lean,Mathlib/MeasureTheory/Measure/Hausdorff.lean,Mathlib/MeasureTheory/Measure/Lebesgue/Basic.lean,Mathlib/MeasureTheory/Measure/LevyProkhorovMetric.lean,Mathlib/MeasureTheory/Measure/MeasureSpace.lean,Mathlib/MeasureTheory/Measure/MeasureSpaceDef.lean,Mathlib/MeasureTheory/Measure/Regular.lean,Mathlib/MeasureTheory/Measure/Typeclasses.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/Order/Filter/Pointwise.lean,Mathlib/Probability/Kernel/Defs.lean,Mathlib/Probability/Martingale/Convergence.lean,Mathlib/RingTheory/Multiplicity.lean,Mathlib/RingTheory/MvPowerSeries/NoZeroDivisors.lean,Mathlib/RingTheory/UniqueFactorizationDomain.lean,Mathlib/Topology/EMetricSpace/Defs.lean,Mathlib/Topology/MetricSpace/Bounded.lean,Mathlib/Topology/MetricSpace/HausdorffDistance.lean,Mathlib/Topology/MetricSpace/Lipschitz.lean 57 30 ['Command-Master', 'YaelDillies', 'github-actions'] nobody
526-81092
1 year ago
526-81092
526 days ago
7-45599
7 days
19212 Julian
author:Julian
 feat(LinearAlgebra): add a variable_alias for VectorSpace Taken directly from the variable_alias docs. Zulip: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/why.20.5Bvariable_alias.5D.20attribute.20is.20not.20used.20in.20Mathlib.3F --- This is the first actual variable alias added to mathlib. I haven't reviewed variable_alias fully, but it seems like there's at least 3 ways they could be distributed in Mathlib: * alongside whatever subfolder they "belong to" (which is what I've tentatively done here) * In a file called `Aliases` somewhere near the thing they alias (which seems less discoverable to me) * In a single file, a la `Mathlib.TrainingWheels` (with some less playful name) which is meant to define a bunch of more "friendly" aliases all in one place. I kind of like the idea of the third thing as a future module but perhaps it can be synthesized if/when there are more aliases? For now as I say I've done the first one, but please let me know if someone prefers something else. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 25/0 Mathlib.lean,Mathlib/LinearAlgebra/VectorSpace.lean,scripts/noshake.json 3 10 ['Julian', 'PieterCuijpers', 'github-actions', 'urkud'] nobody
506-57847
1 year ago
506-57847
506 days ago
7-68089
7 days
19337 zeramorphic
author:zeramorphic
 feat(Data/Finsupp): generalise `Finsupp` to any "zero" value Remove the explicit dependence of `Finsupp` on `[Zero M]`, instead defining `Finsupp'` (better name pending) to be functions that are equal to a fixed value `z : M` cofinitely often. This PR is intended to do the initial work of replacing the definition of `Finsupp` with an instantiation of the more general definition, without adding any appropriate API. If accepted, the API development will follow in later PRs. Issues to consider: - Naming of `Finsupp'.` - Where should `Finsupp'` lemmas go? Do they need their own file/folder under `Data/`? Relevant Zulip threads: - https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Finsupp.20generalisations - https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Finsupp-like.20partial.20function Comments are welcome. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 203/83 Archive/Wiedijk100Theorems/Partition.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/MvPolynomial/Rename.lean,Mathlib/Algebra/MvPolynomial/Variables.lean,Mathlib/Algebra/Polynomial/Basic.lean,Mathlib/Algebra/Polynomial/Laurent.lean,Mathlib/Data/Finsupp/BigOperators.lean,Mathlib/Data/Finsupp/Defs.lean,Mathlib/Data/Finsupp/Order.lean,Mathlib/Data/Nat/Choose/Multinomial.lean,Mathlib/RingTheory/MvPolynomial/Symmetric/Defs.lean,Mathlib/RingTheory/PowerBasis.lean,scripts/nolints_prime_decls.txt 13 5 ['github-actions', 'vihdzp', 'zeramorphic'] nobody
504-33924
1 year ago
504-33924
504 days ago
3-72207
3 days
18756 astrainfinita
author:astrainfinita
 refactor: deprecate `DistribMulActionSemiHomClass` `MulSemiringActionSemiHomClass` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 50/28 Mathlib/Algebra/Algebra/NonUnitalHom.lean,Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/GroupTheory/GroupAction/Hom.lean 3 4 ['astrainfinita', 'github-actions', 'leanprover-bot'] nobody
492-85993
1 year ago
492-85993
492 days ago
31-53021
31 days
16120 awainverse
author:awainverse
 feat(ModelTheory/Algebra/Ring/Basic): Ring homomorphisms are a `StrongHomClass` for the language of rings Adds an `IsAlgebraic` instance to the language of rings Adds a `StrongHomClass` instance to the type of ring homomorphisms between rings with `CompatibleRing` structures --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra RFC t-logic
label:t-algebra$
 34/13 Mathlib/ModelTheory/Algebra/Ring/Basic.lean 1 10 ['ChrisHughes24', 'YaelDillies', 'awainverse', 'github-actions', 'jcommelin'] nobody
465-15767
1 year ago
465-15767
465 days ago
135-29017
135 days
20527 trivial1711
author:trivial1711
 refactor(Topology/UniformSpace/Completion): more descriptive names for `α → Completion α` - We rename the various maps `α → Completion α` in order to make their names more consistent. - Let `α` be a uniform space. We rename the uniformly continuous function `α → Completion α` from `UniformSpace.Completion.coe'` to `UniformSpace.Completion.coe`. - Let `α` be a uniform additive group. We rename the additive group homomorphism `α →+ Completion α` from `UniformSpace.Completion.toCompl` to `UniformSpace.Completion.coeAddHom`. - Let `α` be a uniform ring. The ring homomorphism `α →+* Completion α` is called `UniformSpace.Completion.coeRingHom`; its name is unchanged. - Let `α` be a normed space over a field `𝕜`. We rename the linear isometry `α →ₗᵢ[𝕜] Completion α` from `UniformSpace.Completion.toComplₗᵢ` to `UniformSpace.Completion.coeₗᵢ`. - Let `α` be a normed space over a field `𝕜`. We rename the continuous linear map `α →L[𝕜] Completion α` from `UniformSpace.Completion.toComplL` to `UniformSpace.Completion.coeL`. - Let `α` be a normed additive group. We rename the norm preserving homomorphism `NormedAddGroupHom α (Completion α)` from `NormedAddCommGroup.toCompl` to `UniformSpace.Completion.coeNormedAddGroupHom`. - We analogously rename some other theorems. - We add some trivial theorems (all of which are proved by `rfl`) that state that the functions considered above are equal. We give all of them the `simp` and `norm_cast` attributes. - We add a new theorem `UniformSpace.Completion.coeAddHom_eq_coe` that states that `UniformSpace.Completion.coeAddHom` and `UniformSpace.Completion.coe` are equal as functions. - We similarly add a new theorem `UniformSpace.Completion.coeRingHom_eq_coe`. - We rename the theorem `UniformSpace.Completion.coe_toComplₗᵢ` to `UniformSpace.Completion.coeₗᵢ_eq_coe`. - We rename the theorem `UniformSpace.Completion.coe_toComplL` to `UniformSpace.Completion.coeL_eq_coe`. - We similarly add a new theorem `UniformSpace.Completion.coeNormedAddGroupHom_eq_coe`. - We change all occurrences of the string `((↑) : α → Completion α)` to `(coe : α → Completion α)` or just `coe`. - We put the statements of some theorems into simp normal form by using the plain function `coe` rather than the homomorphisms that carry more structure. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology 130/92 Mathlib/Analysis/Analytic/Uniqueness.lean,Mathlib/Analysis/Calculus/FDeriv/Analytic.lean,Mathlib/Analysis/Complex/AbsMax.lean,Mathlib/Analysis/Complex/Liouville.lean,Mathlib/Analysis/InnerProductSpace/Completion.lean,Mathlib/Analysis/Normed/Group/HomCompletion.lean,Mathlib/Analysis/Normed/Module/Completion.lean,Mathlib/Analysis/SpecialFunctions/NonIntegrable.lean,Mathlib/MeasureTheory/Integral/IntegralEqImproper.lean,Mathlib/Topology/Algebra/GroupCompletion.lean,Mathlib/Topology/Algebra/InfiniteSum/GroupCompletion.lean,Mathlib/Topology/Algebra/InfiniteSum/Nonarchimedean.lean,Mathlib/Topology/Algebra/Nonarchimedean/Completion.lean,Mathlib/Topology/Algebra/UniformRing.lean,Mathlib/Topology/Category/UniformSpace.lean,Mathlib/Topology/MetricSpace/Completion.lean,Mathlib/Topology/UniformSpace/Completion.lean 17 4 ['eric-wieser', 'github-actions', 'trivial1711'] nobody
458-46799
1 year ago
458-46799
458 days ago
6-66637
6 days
18474 astrainfinita
author:astrainfinita
 perf: lower the priority of `*WithOne.to*` instances --- From #7873. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict slow-typeclass-synthesis t-algebra t-data
label:t-algebra$
 9/2 Mathlib/Algebra/Polynomial/BigOperators.lean,Mathlib/Data/Int/Cast/Defs.lean,Mathlib/Data/Nat/Cast/Defs.lean 3 7 ['astrainfinita', 'eric-wieser', 'github-actions', 'leanprover-bot'] nobody
456-33829
1 year ago
456-33829
456 days ago
76-67978
76 days
20372 jvlmdr
author:jvlmdr
 feat(MeasureTheory/Function): Add ContinuousLinearMap.bilinearCompLp(L) Introduce ContinuousLinearMap.bilinearCompLp and bilinearCompLpL. Generalize eLpNorm_le_eLpNorm_mul_eLpNorm theorems to include constant C in bound condition. --- Expect this may be useful for defining tempered distributions from functions in `L^p`. The definitions more or less follow `ContinuousLinearMap.compLp...`. Names are loosely analogous to `ContinuousLinearMap.bilinearComp` and `SchwartzMap.bilinLeftCLM`. Note: I preferred the spelling `hpqr : p⁻¹ + q⁻¹ = r⁻¹` with `f` in `L^p` and `g` in `L^q` to `hpqr : 1 / p = 1 / q + 1 / r`. It's easier to obtain from `ENNReal.IsConjExponent` too. A few questions: - [ ] I defined `bilinear{Left,Right}LpL` in addition to `bilinearCompLpL` because `LinearMap.mkContinuous₂` is marked as `noncomputable` and `LinearMap.mkContinuous` is not. Is this worth the extra definitions? (Note: This is not visible in the source due to `noncomputable section`.) - [ ] Should I use `C : ℝ` instead of `C : NNReal` for `eLpNorm_le_eLpNorm_mul_eLpNorm'_of_norm'`? - [ ] Is it going to be painful to have `[Fact (1 ≤ p)] [Fact (1 ≤ q)] [Fact (1 ≤ r)]`? I don't think there's a way to avoid it though. Maybe providing specialized versions for `p.IsConjExponent q` with `L^1`? Naming: - [ ] Is it satisfactory to add a `'` to the `eLpNorm_le_eLpNorm_mul_eLpNorm ` definitions in `CompareExp.lean` where `≤ ‖f x‖ * ‖g x‖` has been replaced with `≤ C * ‖f x‖ * ‖g x‖`? These could replace the existing theorems, although I don't want to break backwards compatibility. There are 5 instances: `eLpNorm_le_eLpNorm_top_mul_eLpNorm'`, `eLpNorm_le_eLpNorm_mul_eLpNorm_top'`, `eLpNorm'_le_eLpNorm'_mul_eLpNorm''`, `eLpNorm_le_eLpNorm_mul_eLpNorm_of_nnnorm'`, `eLpNorm_le_eLpNorm_mul_eLpNorm'_of_norm'` (I'm not sure why the existing theorem `eLpNorm_le_eLpNorm_mul_eLpNorm'_of_norm` has an internal `'`) - [ ] Is `bilinearLeftLpL` a suitable name? Other options: `bilinearCompLpLeftL`, `bilinearCompLeftLpL`, `bilinLeftLpL` (analogous to `SchwartzMap.bilinLeftCLM`) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-measure-probability new-contributor 203/40 Mathlib/MeasureTheory/Function/LpSeminorm/CompareExp.lean,Mathlib/MeasureTheory/Function/LpSpace.lean 2 1 ['github-actions'] nobody
443-58086
1 year ago
443-58086
443 days ago
27-43617
27 days
21959 BGuillemet
author:BGuillemet
 feat(Topology/ContinuousMap): Stone-Weierstrass theorem for MvPolynomial Add the subalgebra of multivariate polynomials and prove it separates points, on the same model as `ContinuousMap/Polynomial.lean`. Prove the Stone-Weierstrass theorem and some variations for multivariate polynomials. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology new-contributor 285/1 Mathlib.lean,Mathlib/Topology/ContinuousMap/MvPolynomial.lean,Mathlib/Topology/ContinuousMap/StoneWeierstrass.lean 3 1 ['github-actions'] nobody
407-44107
1 year ago
407-44107
407 days ago
16-76141
16 days
18470 astrainfinita
author:astrainfinita
 perf: lower the priority of `Normed*.to*` instances --- From #7873. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict slow-typeclass-synthesis t-algebra t-analysis
label:t-algebra$
 28/0 Mathlib/Analysis/Normed/Field/Basic.lean,Mathlib/Analysis/Normed/Group/Basic.lean 2 9 ['astrainfinita', 'github-actions', 'jcommelin', 'leanprover-bot'] nobody
403-15534
1 year ago
403-15534
403 days ago
129-16341
129 days
8767 eric-wieser
author:eric-wieser
 refactor(Cache): tidy lake-manifest parsing in Cache This now respects local copies of Mathlib dependencies (though in practice these invalidate the *online* cache because to point to local copies of Mathlib, the hash for `lakefile.lean` and `lake-manifest.json` is first invalidated). --- - [x] depends on: #11492 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta 49/49 Cache/Hashing.lean,Cache/IO.lean,lake-manifest.json 3 8 ['digama0', 'eric-wieser', 'github-actions', 'leanprover-community-mathlib4-bot'] nobody
400-15266
1 year ago
581-67616
581 days ago
119-35643
119 days
22660 Ruben-VandeVelde
author:Ruben-VandeVelde
 chore: follow naming convention around Group.IsNilpotent --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 133/67 Mathlib/GroupTheory/Frattini.lean,Mathlib/GroupTheory/Nilpotent.lean,Mathlib/GroupTheory/SpecificGroups/ZGroup.lean 3 1 ['github-actions'] nobody
395-66362
1 year ago
395-66362
395 days ago
10-48025
10 days
21488 imbrem
author:imbrem
 feat(CategoryTheory/Monoidal): premonoidal categories Add support for premonoidal categories --- Still want to add support for: - Premonoidal braided/symmetric categories - The monoidal coherence theorem, which I've already ported in my `discretion` library - The `coherence` tactic, which should work fine for premonoidal categories too but wanted to get this in front of reviewers ASAP to make sure my general approach was alright [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory new-contributor 900/361 Mathlib/Algebra/Category/ModuleCat/Presheaf/Monoidal.lean,Mathlib/CategoryTheory/Bicategory/End.lean,Mathlib/CategoryTheory/GradedObject/Monoidal.lean,Mathlib/CategoryTheory/Localization/Monoidal.lean,Mathlib/CategoryTheory/Monoidal/Braided/Basic.lean,Mathlib/CategoryTheory/Monoidal/Category.lean,Mathlib/CategoryTheory/Monoidal/Center.lean,Mathlib/CategoryTheory/Monoidal/CoherenceLemmas.lean,Mathlib/CategoryTheory/Monoidal/Discrete.lean,Mathlib/CategoryTheory/Monoidal/End.lean,Mathlib/CategoryTheory/Monoidal/Free/Basic.lean,Mathlib/CategoryTheory/Monoidal/Functor.lean,Mathlib/CategoryTheory/Monoidal/FunctorCategory.lean,Mathlib/CategoryTheory/Monoidal/Mon_.lean,Mathlib/CategoryTheory/Monoidal/Opposite.lean,Mathlib/CategoryTheory/Monoidal/Transport.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Datatypes.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Normalize.lean,Mathlib/Tactic/CategoryTheory/Monoidal/PureCoherence.lean,Mathlib/Tactic/CategoryTheory/MonoidalComp.lean,MathlibTest/StringDiagram.lean 21 9 ['YaelDillies', 'github-actions', 'grunweg', 'imbrem', 'kim-em', 'leanprover-community-bot-assistant'] nobody
372-52509
1 year ago
372-52510
372 days ago
57-47357
57 days
21525 sinhp
author:sinhp
 feat(CategoryTheory): Locally Cartesian Closed Categories (Prelim) This PR defines the basic preliminaries for defining locally cartesian closed categories (LCCCs). In particular, using the calculus of mates we define certain natural isomorphisms involving `Over.star` and `Over.pullback` which will be crucial in defining the right adjoint to the pullback functor in the development of LCCCs. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory large-import 338/24 Mathlib/CategoryTheory/Comma/Over/Basic.lean,Mathlib/CategoryTheory/Comma/Over/Pullback.lean,Mathlib/CategoryTheory/Galois/Examples.lean 3 13 ['b-mehta', 'github-actions', 'joelriou', 'leanprover-community-bot-assistant', 'sinhp'] nobody
372-52507
1 year ago
372-52509
372 days ago
36-69400
36 days
16314 astrainfinita
author:astrainfinita
 chore(Data/Quot): deprecate `ind*'` APIs --- - [x] depends on: #16264 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 247/287 Counterexamples/CliffordAlgebraNotInjective.lean,Mathlib/Algebra/Colimit/Module.lean,Mathlib/Algebra/Lie/Quotient.lean,Mathlib/Algebra/Module/Torsion.lean,Mathlib/Algebra/RingQuot.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Angle.lean,Mathlib/CategoryTheory/ConnectedComponents.lean,Mathlib/CategoryTheory/Subobject/Basic.lean,Mathlib/CategoryTheory/Subobject/FactorThru.lean,Mathlib/CategoryTheory/Subobject/Lattice.lean,Mathlib/Computability/Reduce.lean,Mathlib/Computability/Tape.lean,Mathlib/Data/List/Cycle.lean,Mathlib/Data/Multiset/MapFold.lean,Mathlib/Data/Multiset/ZeroCons.lean,Mathlib/Data/Quot.lean,Mathlib/Data/Setoid/Basic.lean,Mathlib/Data/Setoid/Partition.lean,Mathlib/FieldTheory/Fixed.lean,Mathlib/GroupTheory/Complement.lean,Mathlib/GroupTheory/Congruence/Basic.lean,Mathlib/GroupTheory/Congruence/Defs.lean,Mathlib/GroupTheory/Congruence/Hom.lean,Mathlib/GroupTheory/Coset/Basic.lean,Mathlib/GroupTheory/Coset/Defs.lean,Mathlib/GroupTheory/FreeAbelianGroup.lean,Mathlib/GroupTheory/GroupAction/Basic.lean,Mathlib/GroupTheory/GroupAction/Defs.lean,Mathlib/GroupTheory/GroupAction/Quotient.lean,Mathlib/GroupTheory/Index.lean,Mathlib/GroupTheory/MonoidLocalization/Basic.lean,Mathlib/GroupTheory/PGroup.lean,Mathlib/GroupTheory/Perm/Cycle/Concrete.lean,Mathlib/GroupTheory/PresentedGroup.lean,Mathlib/GroupTheory/QuotientGroup/Basic.lean,Mathlib/GroupTheory/QuotientGroup/Defs.lean,Mathlib/GroupTheory/SchurZassenhaus.lean,Mathlib/GroupTheory/Sylow.lean,Mathlib/LinearAlgebra/Alternating/DomCoprod.lean,Mathlib/LinearAlgebra/Projectivization/Basic.lean,Mathlib/LinearAlgebra/Quotient/Basic.lean,Mathlib/LinearAlgebra/Quotient/Defs.lean,Mathlib/MeasureTheory/Function/AEEqFun.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/NumberTheory/RamificationInertia/Basic.lean,Mathlib/Order/Antisymmetrization.lean,Mathlib/Order/Category/PartOrd.lean,Mathlib/Order/Filter/Germ/Basic.lean,Mathlib/RepresentationTheory/GroupCohomology/Hilbert90.lean,Mathlib/RingTheory/AdicCompletion/Algebra.lean,Mathlib/RingTheory/AdicCompletion/Basic.lean,Mathlib/RingTheory/AdicCompletion/Functoriality.lean,Mathlib/RingTheory/AdjoinRoot.lean,Mathlib/RingTheory/Congruence/Basic.lean,Mathlib/RingTheory/Flat/FaithfullyFlat/Basic.lean,Mathlib/RingTheory/GradedAlgebra/HomogeneousLocalization.lean,Mathlib/RingTheory/Ideal/Cotangent.lean,Mathlib/RingTheory/Ideal/Norm/AbsNorm.lean,Mathlib/RingTheory/Ideal/Quotient/Basic.lean,Mathlib/RingTheory/Ideal/Quotient/Defs.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/Valuation/Quotient.lean,Mathlib/Topology/Algebra/Group/TopologicalAbelianization.lean,Mathlib/Topology/Algebra/InfiniteSum/Module.lean,Mathlib/Topology/Separation/Basic.lean 65 4 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
366-77473
1 year ago
366-77475
366 days ago
55-36935
55 days
15483 astrainfinita
author:astrainfinita
 chore(GroupTheory/Coset): reduce defeq abuse --- - [x] depends on: #15482 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 114/60 Mathlib/GroupTheory/Commensurable.lean,Mathlib/GroupTheory/Coset.lean,Mathlib/GroupTheory/QuotientGroup.lean,Mathlib/LinearAlgebra/Alternating/DomCoprod.lean,Mathlib/MeasureTheory/Measure/Haar/Quotient.lean,Mathlib/Topology/Algebra/Group/Compact.lean 6 14 ['astrainfinita', 'eric-wieser', 'github-actions', 'grunweg', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'mattrobball', 'mergify', 'urkud'] nobody
366-22366
1 year ago
614-60696
614 days ago
4-79214
4 days
16594 astrainfinita
author:astrainfinita
 perf: reorder `extends` and remove some instances in algebra hierarchy --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict slow-typeclass-synthesis t-algebra
label:t-algebra$
 240/92 Mathlib.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Associated/Basic.lean,Mathlib/Algebra/BigOperators/Ring/List.lean,Mathlib/Algebra/Field/Defs.lean,Mathlib/Algebra/GCDMonoid/Basic.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Ext.lean,Mathlib/Algebra/Group/Opposite.lean,Mathlib/Algebra/Group/Prod.lean,Mathlib/Algebra/GroupWithZero/Defs.lean,Mathlib/Algebra/GroupWithZero/Prod.lean,Mathlib/Algebra/Homology/Embedding/Basic.lean,Mathlib/Algebra/Order/AddGroupWithTop.lean,Mathlib/Algebra/Order/Field/Canonical/Defs.lean,Mathlib/Algebra/Order/Field/Defs.lean,Mathlib/Algebra/Order/Group/Unbundled/Abs.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/Ring/Canonical.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Polynomial/Roots.lean,Mathlib/Algebra/Quaternion.lean,Mathlib/Algebra/Ring/Defs.lean,Mathlib/Algebra/Ring/Ext.lean,Mathlib/Algebra/Ring/InjSurj.lean,Mathlib/Algebra/Ring/Rat.lean,Mathlib/Algebra/Ring/SumsOfSquares.lean,Mathlib/Algebra/Tropical/Basic.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Order.lean,Mathlib/Analysis/InnerProductSpace/Symmetric.lean,Mathlib/CategoryTheory/Preadditive/FunctorCategory.lean,Mathlib/Data/Finset/NoncommProd.lean,Mathlib/Data/Int/Cast/Defs.lean,Mathlib/FieldTheory/IsAlgClosed/AlgebraicClosure.lean,Mathlib/FieldTheory/SplittingField/Construction.lean,Mathlib/GroupTheory/Congruence/Basic.lean,Mathlib/GroupTheory/MonoidLocalization/MonoidWithZero.lean,Mathlib/GroupTheory/Torsion.lean,Mathlib/LinearAlgebra/LinearPMap.lean,Mathlib/LinearAlgebra/TensorProduct/Basic.lean,Mathlib/Order/Filter/Germ/Basic.lean,Mathlib/Order/Interval/Finset/Box.lean,Mathlib/RingTheory/Bialgebra/Hom.lean,Mathlib/RingTheory/Coalgebra/Hom.lean,Mathlib/RingTheory/Ideal/Quotient.lean,Mathlib/RingTheory/Perfection.lean,Mathlib/RingTheory/TensorProduct/Basic.lean,Mathlib/RingTheory/TensorProduct/MvPolynomial.lean,Mathlib/Util/NoInstances.lean,scripts/noshake.json 50 8 ['astrainfinita', 'github-actions', 'grunweg', 'leanprover-bot'] nobody
366-22142
1 year ago
570-61689
570 days ago
14-58900
14 days
23859 urkud
author:urkud
 feat(Topology/../Order/Field): generalize to `Semifield` .. from a linear ordered field to a linear ordered semifield--- - [ ] depends on: #23857 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology 245/219 Mathlib/Algebra/Order/Group/Pointwise/Interval.lean,Mathlib/Analysis/BoxIntegral/Box/SubboxInduction.lean,Mathlib/Topology/Algebra/Order/Field.lean,Mathlib/Topology/Order/Basic.lean 4 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
359-65383
11 months ago
372-76024
372 days ago
0-265
4 minutes
23810 b-reinke
author:b-reinke
 chore(Order/Interval): generalize succ/pred lemmas to partial orders Many lemmas in `Mathlib/Order/Interval/Set/SuccPred.lean`and `Mathlib/Order/Interval/Finset/SuccPred.lean` also work for partial orders. They are generalized in this PR by introducing different sections for `PartialOrder` and `LinearOrder` assumptions in the respective files. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-order 231/89 Mathlib/Order/Interval/Finset/SuccPred.lean,Mathlib/Order/Interval/Set/SuccPred.lean 2 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
357-42158
11 months ago
357-42160
357 days ago
16-29623
16 days
24285 madvorak
author:madvorak
 chore(Algebra/*-{Category,Homology}): remove unnecessary universe variables Discussions: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Call.20for.20help.3A.20technical.2F.20organisational.20debt/with/513620128 https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Algebra.20and.20.60Type*.60/with/513558902 https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Task.2026.3A.20Replace.20Type.20u.20by.20Type*.20wherever.20possible/with/513592993 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 542/916 Mathlib/Algebra/AddTorsor/Basic.lean,Mathlib/Algebra/Algebra/Defs.lean,Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Algebra/Field.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Algebra/Operations.lean,Mathlib/Algebra/Algebra/Spectrum/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/Algebra/Algebra/Subalgebra/Tower.lean,Mathlib/Algebra/Algebra/Tower.lean,Mathlib/Algebra/Central/Basic.lean,Mathlib/Algebra/Central/Defs.lean,Mathlib/Algebra/Central/TensorProduct.lean,Mathlib/Algebra/CharP/Pi.lean,Mathlib/Algebra/CharP/Quotient.lean,Mathlib/Algebra/CharP/Subring.lean,Mathlib/Algebra/DirectSum/Algebra.lean,Mathlib/Algebra/DirectSum/Basic.lean,Mathlib/Algebra/DirectSum/Finsupp.lean,Mathlib/Algebra/DirectSum/Module.lean,Mathlib/Algebra/EuclideanDomain/Basic.lean,Mathlib/Algebra/EuclideanDomain/Defs.lean,Mathlib/Algebra/Field/Basic.lean,Mathlib/Algebra/Field/Defs.lean,Mathlib/Algebra/Field/IsField.lean,Mathlib/Algebra/Field/MinimalAxioms.lean,Mathlib/Algebra/Field/Subfield/Basic.lean,Mathlib/Algebra/Field/Subfield/Defs.lean,Mathlib/Algebra/FreeNonUnitalNonAssocAlgebra.lean,Mathlib/Algebra/Group/Conj.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Equiv/Finite.lean,Mathlib/Algebra/Group/Ext.lean,Mathlib/Algebra/Group/Hom/End.lean,Mathlib/Algebra/Group/Hom/Instances.lean,Mathlib/Algebra/Group/Invertible/Basic.lean,Mathlib/Algebra/Group/Invertible/Defs.lean,Mathlib/Algebra/Group/Pi/Basic.lean,Mathlib/Algebra/Group/Pi/Lemmas.lean,Mathlib/Algebra/Group/TypeTags/Basic.lean,Mathlib/Algebra/Group/TypeTags/Finite.lean,Mathlib/Algebra/Group/TypeTags/Hom.lean,Mathlib/Algebra/Group/Units/Basic.lean,Mathlib/Algebra/Group/Units/Defs.lean,Mathlib/Algebra/Group/Units/Hom.lean,Mathlib/Algebra/Group/WithOne/Basic.lean,Mathlib/Algebra/Group/WithOne/Defs.lean,Mathlib/Algebra/GroupWithZero/Action/Pi.lean,Mathlib/Algebra/GroupWithZero/Defs.lean,Mathlib/Algebra/GroupWithZero/Invertible.lean,Mathlib/Algebra/GroupWithZero/NeZero.lean,Mathlib/Algebra/Lie/Abelian.lean,Mathlib/Algebra/Lie/Basic.lean,Mathlib/Algebra/Lie/CartanMatrix.lean,Mathlib/Algebra/Lie/CartanSubalgebra.lean,Mathlib/Algebra/Lie/Character.lean,Mathlib/Algebra/Lie/Classical.lean,Mathlib/Algebra/Lie/DirectSum.lean,Mathlib/Algebra/Lie/Free.lean,Mathlib/Algebra/Lie/Ideal.lean,Mathlib/Algebra/Lie/IdealOperations.lean,Mathlib/Algebra/Lie/Matrix.lean,Mathlib/Algebra/Lie/Nilpotent.lean,Mathlib/Algebra/Lie/NonUnitalNonAssocAlgebra.lean,Mathlib/Algebra/Lie/OfAssociative.lean,Mathlib/Algebra/Lie/Quotient.lean,Mathlib/Algebra/Lie/SkewAdjoint.lean,Mathlib/Algebra/Lie/Solvable.lean,Mathlib/Algebra/Lie/Subalgebra.lean,Mathlib/Algebra/Lie/Submodule.lean,Mathlib/Algebra/Lie/TensorProduct.lean,Mathlib/Algebra/Lie/UniversalEnveloping.lean,Mathlib/Algebra/Module/Basic.lean,Mathlib/Algebra/Module/CharacterModule.lean,Mathlib/Algebra/Module/DedekindDomain.lean,Mathlib/Algebra/Module/Defs.lean,Mathlib/Algebra/Module/End.lean,Mathlib/Algebra/Module/Equiv/Opposite.lean,Mathlib/Algebra/Module/Lattice.lean,Mathlib/Algebra/Module/LinearMap/Basic.lean,Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/Algebra/Module/LinearMap/End.lean,Mathlib/Algebra/Module/LocalizedModule/Basic.lean,Mathlib/Algebra/Module/MinimalAxioms.lean,Mathlib/Algebra/Module/NatInt.lean,Mathlib/Algebra/Module/Opposite.lean,Mathlib/Algebra/Module/Pi.lean,Mathlib/Algebra/Module/Presentation/Differentials.lean,Mathlib/Algebra/Module/Presentation/Tensor.lean,Mathlib/Algebra/Module/Rat.lean,Mathlib/Algebra/Module/RingHom.lean,Mathlib/Algebra/Module/Submodule/Basic.lean,Mathlib/Algebra/Module/Torsion.lean,Mathlib/Algebra/MonoidAlgebra/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Defs.lean,Mathlib/Algebra/MonoidAlgebra/Support.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/MvPolynomial/CommRing.lean,Mathlib/Algebra/MvPolynomial/Degrees.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean 182 22 ['erdOne', 'github-actions', 'leanprover-bot', 'leanprover-community-bot-assistant', 'madvorak', 'mattrobball'] nobody
357-30855
11 months ago
357-30856
357 days ago
2-12017
2 days
23349 BGuillemet
author:BGuillemet
 feat: add LocallyLipschitzOn.lipschitzOnWith_of_isCompact and two small lemmas about Lipschitz functions Main feat (in Mathlib/Topology/EMetricSpace/Basic.lean): if a function `f` from an extended pseudometric space to a pseudometric space is locally Lipschitz on a compact subset `s`, then `f` is Lipschitz on `s`. The theorem is true only when the codomain of `f` is a pseudometric space, so it needs imports from Mathlib/Topology/MetricSpace. Other small feat (in Mathlib/Analysis/Calculus/ContDiff/RCLike.lean): a function that is continuously differentiable on an open subset is locally Lipschitz on this subset. --- - [ ] depends on: #22890 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology large-import new-contributor 59/4 Mathlib/Analysis/Calculus/ContDiff/RCLike.lean,Mathlib/Topology/EMetricSpace/Lipschitz.lean 2 4 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] PatrickMassot
assignee:PatrickMassot
324-37605
10 months ago
324-37607
324 days ago
35-30364
35 days
25340 dupuisf
author:dupuisf
 chore(Analysis/Convex): move files pertaining to convex/concave functions to their own folder This PR creates a new folder under `Analysis/Convex` called `Analysis/Convex/Function`, which includes files that are mostly or entirely about convex/concave functions (as opposed to convex sets). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-convex-geometry 4264/4155 Mathlib.lean,Mathlib/Analysis/Convex/Continuous.lean,Mathlib/Analysis/Convex/Deriv.lean,Mathlib/Analysis/Convex/Exposed.lean,Mathlib/Analysis/Convex/Extrema.lean,Mathlib/Analysis/Convex/Function.lean,Mathlib/Analysis/Convex/Function/Basic.lean,Mathlib/Analysis/Convex/Function/Continuous.lean,Mathlib/Analysis/Convex/Function/Deriv.lean,Mathlib/Analysis/Convex/Function/Extrema.lean,Mathlib/Analysis/Convex/Function/Integral.lean,Mathlib/Analysis/Convex/Function/Jensen.lean,Mathlib/Analysis/Convex/Function/Mul.lean,Mathlib/Analysis/Convex/Function/Piecewise.lean,Mathlib/Analysis/Convex/Function/Quasiconvex.lean,Mathlib/Analysis/Convex/Function/Slope.lean,Mathlib/Analysis/Convex/Function/Strong.lean,Mathlib/Analysis/Convex/Integral.lean,Mathlib/Analysis/Convex/Jensen.lean,Mathlib/Analysis/Convex/Mul.lean,Mathlib/Analysis/Convex/Piecewise.lean,Mathlib/Analysis/Convex/Quasiconvex.lean,Mathlib/Analysis/Convex/Slope.lean,Mathlib/Analysis/Convex/SpecificFunctions/Basic.lean,Mathlib/Analysis/Convex/SpecificFunctions/Deriv.lean,Mathlib/Analysis/Convex/Strong.lean,Mathlib/Analysis/MeanInequalities.lean,Mathlib/Analysis/MeanInequalitiesPow.lean,Mathlib/Analysis/Normed/Module/Convex.lean,Mathlib/Analysis/Seminorm.lean,Mathlib/Analysis/SpecialFunctions/Log/NegMulLog.lean,Mathlib/Analysis/SpecialFunctions/Pochhammer.lean,Mathlib/MeasureTheory/Measure/Decomposition/IntegralRNDeriv.lean,Mathlib/NumberTheory/Harmonic/GammaDeriv.lean 34 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
313-60432
10 months ago
313-60434
313 days ago
6-39812
6 days
18441 ADedecker
author:ADedecker
 refactor(AdicTopology): use new API for algebraic filter bases, and factor some code --- - [x] depends on: #18437 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology t-algebra
label:t-algebra$
 847/159 Mathlib.lean,Mathlib/Topology/Algebra/FilterBasis.lean,Mathlib/Topology/Algebra/FilterBasisNew.lean,Mathlib/Topology/Algebra/Nonarchimedean/AdicTopology.lean,Mathlib/Topology/Algebra/Nonarchimedean/Bases.lean,Mathlib/Topology/Algebra/Nonarchimedean/BasesNew.lean 6 3 ['ADedecker', 'github-actions', 'mathlib4-dependent-issues-bot'] nobody
301-52173
9 months ago
533-50072
533 days ago
0-679
11 minutes
18439 ADedecker
author:ADedecker
 refactor: use new algebraic filter bases API in `FiniteAdeleRing` --- - [x] depends on: #18437 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology t-algebra
label:t-algebra$
 699/21 Mathlib.lean,Mathlib/RingTheory/DedekindDomain/FiniteAdeleRing.lean,Mathlib/Topology/Algebra/FilterBasis.lean,Mathlib/Topology/Algebra/FilterBasisNew.lean,Mathlib/Topology/Algebra/Nonarchimedean/Bases.lean,Mathlib/Topology/Algebra/Nonarchimedean/BasesNew.lean 6 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
301-52171
9 months ago
533-51715
533 days ago
0-619
10 minutes
18438 ADedecker
author:ADedecker
 refactor: adapt `KrullTopology` to the new algebraic filter bases API --- - [x] depends on: #18437 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology t-algebra
label:t-algebra$
 771/168 Mathlib.lean,Mathlib/FieldTheory/KrullTopology.lean,Mathlib/Topology/Algebra/FilterBasis.lean,Mathlib/Topology/Algebra/FilterBasisNew.lean,Mathlib/Topology/Algebra/Nonarchimedean/Bases.lean,Mathlib/Topology/Algebra/Nonarchimedean/BasesNew.lean 6 5 ['ADedecker', 'AntoineChambert-Loir', 'github-actions', 'mathlib4-dependent-issues-bot'] nobody
301-52170
9 months ago
533-52357
533 days ago
0-638
10 minutes
13964 pechersky
author:pechersky
 feat(Data/DigitExpansion): begin defining variant of reals without rationals Based on a de Bruijn 1976 paper. This file is just the basic definition of a digit expansion. Will be followed up with further constructions. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 518/0 Mathlib.lean,Mathlib/Data/DigitExpansion/Defs.lean,docs/references.bib 3 11 ['eric-wieser', 'github-actions', 'kim-em', 'pechersky'] dupuisf
assignee:dupuisf
298-34461
9 months ago
536-60677
536 days ago
129-57999
129 days
24823 eric-wieser
author:eric-wieser
 refactor: add `hom` lemmas for the `MonoidalCategory` structure on `ModuleCat` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 148/164 Mathlib/Algebra/Category/FGModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Adjunctions.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Closed.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Symmetric.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Free.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Generator.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Monoidal.lean,Mathlib/CategoryTheory/Monoidal/Internal/Module.lean,Mathlib/RepresentationTheory/Coinvariants.lean,Mathlib/RepresentationTheory/Rep.lean 11 21 ['101damnations', 'YaelDillies', 'eric-wieser', 'github-actions', 'joelriou', 'kbuzzard', 'leanprover-community-bot-assistant'] 101damnations
assignee:101damnations
285-85521
9 months ago
285-85521
285 days ago
40-60910
40 days
25071 erdOne
author:erdOne
 feat(EllipticCurve): basic API for singular cubics --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebraic-geometry 320/0 Mathlib.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Singular/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/VariableChange.lean 3 35 ['Multramate', 'acmepjz', 'erdOne', 'github-actions', 'leanprover-community-bot-assistant'] nobody
285-85275
9 months ago
285-85276
285 days ago
45-4562
45 days
25988 Multramate
author:Multramate
 refactor(AlgebraicGeometry/EllipticCurve/*): replace Fin 3 with products This PR continues the work from #24593. Original PR: https://github.com/leanprover-community/mathlib4/pull/24593 merge-conflict t-algebraic-geometry 1000/1022 Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian/Formula.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian/Point.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Projective/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Projective/Formula.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Projective/Point.lean 6 3 ['Multramate', 'github-actions', 'leanprover-community-bot-assistant'] nobody
285-84963
9 months ago
285-84963
285 days ago
18-21880
18 days
24405 mcdoll
author:mcdoll
 refactor(Topology/Algebra/Module/WeakDual): Clean up - Move `Dual` and `dualPairing` lower in the import-hierachy - deduplicate `dualPairing` - Make `WeakDual` and `WeakSpace` reducible --- New version of #11500 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology large-import 146/162 Mathlib.lean,Mathlib/Analysis/Fourier/RiemannLebesgueLemma.lean,Mathlib/Analysis/InnerProductSpace/Adjoint.lean,Mathlib/Analysis/InnerProductSpace/Dual.lean,Mathlib/Analysis/LocallyConvex/WeakSpace.lean,Mathlib/Analysis/Normed/Module/Dual.lean,Mathlib/Analysis/Normed/Module/WeakDual.lean,Mathlib/Analysis/VonNeumannAlgebra/Basic.lean,Mathlib/MeasureTheory/Function/AEEqOfIntegral.lean,Mathlib/MeasureTheory/Measure/FiniteMeasure.lean,Mathlib/Topology/Algebra/Module/Dual.lean,Mathlib/Topology/Algebra/Module/WeakDual.lean,docs/overview.yaml,docs/undergrad.yaml 14 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
284-50392
9 months ago
284-50393
284 days ago
69-52361
69 days
26067 mapehe
author:mapehe
 feat(Topology/StoneCech): exists_continuous_surjection_from_StoneCech_to_dense_range This lemma formalises the following version of the maximality property of the Stone–Čech compactification: If `f : α → β` is a continuous map from a topological space `α` to a Hausdorff space `β` with dense range, then there exists a continuous surjection from `StoneCech α` to `β` extending `f`. In particular, `StoneCech α` is the “largest” compact Hausdorff space into which `α` densely embeds, in the sense that any other such space is a continuous image of it. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology 18/0 Mathlib/Topology/StoneCech.lean 1 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
282-66341
9 months ago
282-66341
282 days ago
20-8582
20 days
25238 Hagb
author:Hagb
 feat(Tactic/ComputeDegree): add support for scalar multiplication with different types It would be able to deal with `a • (X : R[X])` where `a : S` is in a different type `S` with `[SMulZeroClass S R]`. --- - [x] depends on: #25237 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta new-contributor 17/5 Mathlib/Tactic/ComputeDegree.lean,MathlibTest/ComputeDegree.lean 2 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
255-63603
8 months ago
285-85272
285 days ago
38-26044
38 days
26200 adomani
author:adomani
 fix: add label when landrun fails Adds the `permission-denied` label on PRs that get blocked by landrun. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict CI 68/8 .github/build.in.yml,.github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build_fork.yml 4 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
254-14556
8 months ago
254-14556
254 days ago
46-52210
46 days
27451 kckennylau
author:kckennylau
 feat(RingTheory/Valuation): define ball, closed ball, and sphere *From the 2025 Local Class Field Theory Workshop.* --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-ring-theory 27/0 Mathlib/RingTheory/Valuation/Basic.lean 1 13 ['JovanGerb', 'github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot', 'pechersky', 'wwylele'] nobody
248-47059
8 months ago
248-47060
248 days ago
17-52359
17 days
27987 kckennylau
author:kckennylau
 feat(RingTheory/Valuation): define ball, closed ball, and sphere --- The pullback PR of #26827 and #27451. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-ring-theory large-import 73/0 Mathlib/RingTheory/Valuation/Basic.lean 1 4 ['JovanGerb', 'github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot'] nobody
248-46688
8 months ago
248-46689
248 days ago
6-6455
6 days
27003 eric-wieser
author:eric-wieser
 chore: use `Simp.ResultQ` more often Also uses `~q` in place of manual `isDefEq` matching. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta 18/22 Mathlib/Tactic/NormNum/Core.lean,Mathlib/Tactic/NormNum/Result.lean,Mathlib/Tactic/ReduceModChar.lean 3 7 ['JovanGerb', 'eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot'] JovanGerb
assignee:JovanGerb
246-61312
8 months ago
246-61313
246 days ago
32-70098
32 days
25401 digama0
author:digama0
 feat(Util): SuppressSorry option See also leanprover/lean4#8611 and [#lean4 > Silent sorry @ 💬](https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/Silent.20sorry/near/503537964). This is a stop-gap solution while leanprover/lean4#8611 is underway, but it works about as well as any other built in option. Hooking declaration elaborators turns out to be a very powerful technique. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta 342/0 Mathlib.lean,Mathlib/Util/CommandElabHook.lean,Mathlib/Util/SuppressSorry.lean,MathlibTest/suppressSorry.lean 4 15 ['digama0', 'eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot'] alexjbest
assignee:alexjbest
246-16108
8 months ago
246-16108
246 days ago
71-28496
71 days
28622 alreadydone
author:alreadydone
 chore(Mathlib): replace `=>` by `↦` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 51792/51792 Mathlib/Algebra/AddTorsor/Basic.lean,Mathlib/Algebra/AddTorsor/Defs.lean,Mathlib/Algebra/Algebra/Basic.lean,Mathlib/Algebra/Algebra/Bilinear.lean,Mathlib/Algebra/Algebra/Defs.lean,Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Algebra/Hom/Rat.lean,Mathlib/Algebra/Algebra/NonUnitalHom.lean,Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/Algebra/Operations.lean,Mathlib/Algebra/Algebra/Opposite.lean,Mathlib/Algebra/Algebra/Prod.lean,Mathlib/Algebra/Algebra/Rat.lean,Mathlib/Algebra/Algebra/Spectrum/Basic.lean,Mathlib/Algebra/Algebra/Spectrum/Pi.lean,Mathlib/Algebra/Algebra/Spectrum/Quasispectrum.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Centralizer.lean,Mathlib/Algebra/Algebra/Subalgebra/Directed.lean,Mathlib/Algebra/Algebra/Subalgebra/IsSimpleOrder.lean,Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/Algebra/Algebra/Subalgebra/Matrix.lean,Mathlib/Algebra/Algebra/Subalgebra/Operations.lean,Mathlib/Algebra/Algebra/Subalgebra/Pointwise.lean,Mathlib/Algebra/Algebra/Subalgebra/Prod.lean,Mathlib/Algebra/Algebra/Subalgebra/Unitization.lean,Mathlib/Algebra/Algebra/Tower.lean,Mathlib/Algebra/Algebra/TransferInstance.lean,Mathlib/Algebra/Algebra/Unitization.lean,Mathlib/Algebra/Algebra/ZMod.lean,Mathlib/Algebra/AlgebraicCard.lean,Mathlib/Algebra/BigOperators/Associated.lean,Mathlib/Algebra/BigOperators/Expect.lean,Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/BigOperators/Finsupp/Basic.lean,Mathlib/Algebra/BigOperators/Finsupp/Fin.lean,Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean,Mathlib/Algebra/BigOperators/Group/Finset/Defs.lean,Mathlib/Algebra/BigOperators/Group/Finset/Piecewise.lean,Mathlib/Algebra/BigOperators/Group/Finset/Sigma.lean,Mathlib/Algebra/BigOperators/Group/List/Basic.lean,Mathlib/Algebra/BigOperators/Group/List/Defs.lean,Mathlib/Algebra/BigOperators/Group/List/Lemmas.lean,Mathlib/Algebra/BigOperators/Group/Multiset/Basic.lean,Mathlib/Algebra/BigOperators/Group/Multiset/Defs.lean,Mathlib/Algebra/BigOperators/GroupWithZero/Finset.lean,Mathlib/Algebra/BigOperators/Intervals.lean,Mathlib/Algebra/BigOperators/Option.lean,Mathlib/Algebra/BigOperators/Pi.lean,Mathlib/Algebra/BigOperators/Ring/Finset.lean,Mathlib/Algebra/BigOperators/Ring/Multiset.lean,Mathlib/Algebra/Category/AlgCat/Basic.lean,Mathlib/Algebra/Category/AlgCat/Limits.lean,Mathlib/Algebra/Category/AlgCat/Monoidal.lean,Mathlib/Algebra/Category/BialgCat/Basic.lean,Mathlib/Algebra/Category/BoolRing.lean,Mathlib/Algebra/Category/CoalgCat/Basic.lean,Mathlib/Algebra/Category/CoalgCat/ComonEquivalence.lean,Mathlib/Algebra/Category/FGModuleCat/Limits.lean,Mathlib/Algebra/Category/Grp/AB.lean,Mathlib/Algebra/Category/Grp/Adjunctions.lean,Mathlib/Algebra/Category/Grp/Basic.lean,Mathlib/Algebra/Category/Grp/Biproducts.lean,Mathlib/Algebra/Category/Grp/CartesianMonoidal.lean,Mathlib/Algebra/Category/Grp/Colimits.lean,Mathlib/Algebra/Category/Grp/EpiMono.lean,Mathlib/Algebra/Category/Grp/FilteredColimits.lean,Mathlib/Algebra/Category/Grp/Images.lean,Mathlib/Algebra/Category/Grp/Kernels.lean,Mathlib/Algebra/Category/Grp/LargeColimits.lean,Mathlib/Algebra/Category/Grp/LeftExactFunctor.lean,Mathlib/Algebra/Category/Grp/Limits.lean,Mathlib/Algebra/Category/Grp/Preadditive.lean,Mathlib/Algebra/Category/Grp/ZModuleEquivalence.lean,Mathlib/Algebra/Category/Grp/Zero.lean,Mathlib/Algebra/Category/GrpWithZero.lean,Mathlib/Algebra/Category/HopfAlgCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Adjunctions.lean,Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Biproducts.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/Colimits.lean,Mathlib/Algebra/Category/ModuleCat/EpiMono.lean,Mathlib/Algebra/Category/ModuleCat/FilteredColimits.lean,Mathlib/Algebra/Category/ModuleCat/Images.lean,Mathlib/Algebra/Category/ModuleCat/Injective.lean,Mathlib/Algebra/Category/ModuleCat/Kernels.lean,Mathlib/Algebra/Category/ModuleCat/Limits.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Closed.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Symmetric.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Abelian.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Colimits.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Limits.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Pushforward.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Sheafify.lean,Mathlib/Algebra/Category/ModuleCat/Products.lean 3838 4 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
240-19588
7 months ago
240-19589
240 days ago
0-66771
18 hours
28626 alreadydone
author:alreadydone
 chore(Archive, Counterexamples): replace => by ↦ --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 288/288 Archive/Arithcc.lean,Archive/Examples/IfNormalization/Result.lean,Archive/Examples/IfNormalization/WithoutAesop.lean,Archive/Examples/PropEncodable.lean,Archive/Imo/Imo1959Q1.lean,Archive/Imo/Imo1960Q1.lean,Archive/Imo/Imo1962Q4.lean,Archive/Imo/Imo1972Q5.lean,Archive/Imo/Imo1977Q6.lean,Archive/Imo/Imo1981Q3.lean,Archive/Imo/Imo1987Q1.lean,Archive/Imo/Imo1988Q6.lean,Archive/Imo/Imo1994Q1.lean,Archive/Imo/Imo1998Q2.lean,Archive/Imo/Imo2001Q2.lean,Archive/Imo/Imo2006Q3.lean,Archive/Imo/Imo2006Q5.lean,Archive/Imo/Imo2008Q2.lean,Archive/Imo/Imo2008Q4.lean,Archive/Imo/Imo2011Q3.lean,Archive/Imo/Imo2013Q1.lean,Archive/Imo/Imo2019Q1.lean,Archive/Imo/Imo2024Q5.lean,Archive/MiuLanguage/Basic.lean,Archive/MiuLanguage/DecisionSuf.lean,Archive/OxfordInvariants/Summer2021/Week3P1.lean,Archive/Sensitivity.lean,Archive/Wiedijk100Theorems/AbelRuffini.lean,Archive/Wiedijk100Theorems/AreaOfACircle.lean,Archive/Wiedijk100Theorems/AscendingDescendingSequences.lean,Archive/Wiedijk100Theorems/BallotProblem.lean,Archive/Wiedijk100Theorems/BirthdayProblem.lean,Archive/Wiedijk100Theorems/BuffonsNeedle.lean,Archive/Wiedijk100Theorems/CubingACube.lean,Archive/Wiedijk100Theorems/FriendshipGraphs.lean,Archive/Wiedijk100Theorems/Konigsberg.lean,Archive/Wiedijk100Theorems/Partition.lean,Archive/Wiedijk100Theorems/SumOfPrimeReciprocalsDiverges.lean,Archive/ZagierTwoSquares.lean,Counterexamples/AharoniKorman.lean,Counterexamples/CanonicallyOrderedCommSemiringTwoMul.lean,Counterexamples/CharPZeroNeCharZero.lean,Counterexamples/CliffordAlgebraNotInjective.lean,Counterexamples/DirectSumIsInternal.lean,Counterexamples/GameMultiplication.lean,Counterexamples/Girard.lean,Counterexamples/HomogeneousPrimeNotPrime.lean,Counterexamples/MapFloor.lean,Counterexamples/MonicNonRegular.lean,Counterexamples/Phillips.lean,Counterexamples/Pseudoelement.lean,Counterexamples/QuadraticForm.lean,Counterexamples/SorgenfreyLine.lean,Counterexamples/ZeroDivisorsInAddMonoidAlgebras.lean 54 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
238-48714
7 months ago
238-48715
238 days ago
2-47570
2 days
28150 Equilibris
author:Equilibris
 chore: clean up proofs typevec proofs While adding variable universe corecs I found a lot of theorems in typevec that could do with a bit of a clean-up --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data new-contributor 24/26 Mathlib/Data/TypeVec.lean 1 7 ['Equilibris', 'alexkeizer', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
237-16030
7 months ago
237-16031
237 days ago
13-49738
13 days
27403 MoritzBeroRoos
author:MoritzBeroRoos
 fix: replace probably erroneous usage of ⬝ (with old \cdot) by · (with \centerdot) Discussion at [zulip](https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/.5Ccdot.20!.3D.20.5Ccenterdot). Currently the abbreviations \cdot and \centerdot resolve to different, with the naked eye nearly undistinguishable symbols (despite the c in cdot surely standing for center..). This pr replaces instances of ⬝ where · was probably meant. All of the replacement is in comments, except for the file bench_summary.lean which is used for priting the github benchmark results. Since this file is about scientific notation of numbers, sure · was meant to be used, not a rectangle. [Related](https://github.com/leanprover-community/mathlib4/pull/27399) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict new-contributor 195/195 Mathlib/Algebra/ContinuedFractions/Computation/Approximations.lean,Mathlib/Algebra/DirectSum/Idempotents.lean,Mathlib/Algebra/Lie/Derivation/Basic.lean,Mathlib/Algebra/Module/Equiv/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/DivisionPolynomial/Basic.lean,Mathlib/Analysis/Analytic/Constructions.lean,Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Bounds.lean,Mathlib/Analysis/Calculus/FDeriv/Symmetric.lean,Mathlib/Analysis/Fourier/FourierTransformDeriv.lean,Mathlib/Analysis/InnerProductSpace/Dual.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Analysis/Normed/Unbundled/InvariantExtension.lean,Mathlib/Analysis/SpecialFunctions/Complex/CircleAddChar.lean,Mathlib/Combinatorics/Configuration.lean,Mathlib/Combinatorics/SimpleGraph/AdjMatrix.lean,Mathlib/Combinatorics/SimpleGraph/LapMatrix.lean,Mathlib/Data/Matrix/Block.lean,Mathlib/Data/Matrix/ConjTranspose.lean,Mathlib/Data/Matrix/Hadamard.lean,Mathlib/Data/Matrix/Mul.lean,Mathlib/Data/Matrix/Notation.lean,Mathlib/Data/Matrix/Reflection.lean,Mathlib/Data/Matrix/RowCol.lean,Mathlib/Data/Matrix/Vec.lean,Mathlib/FieldTheory/PurelyInseparable/PerfectClosure.lean,Mathlib/Geometry/Manifold/GroupLieAlgebra.lean,Mathlib/GroupTheory/Coxeter/Matrix.lean,Mathlib/LinearAlgebra/CrossProduct.lean,Mathlib/LinearAlgebra/Matrix/BilinearForm.lean,Mathlib/LinearAlgebra/Matrix/DotProduct.lean,Mathlib/LinearAlgebra/Matrix/Nondegenerate.lean,Mathlib/LinearAlgebra/Matrix/Orthogonal.lean,Mathlib/LinearAlgebra/Matrix/PosDef.lean,Mathlib/LinearAlgebra/Matrix/SchurComplement.lean,Mathlib/LinearAlgebra/Matrix/SesquilinearForm.lean,Mathlib/LinearAlgebra/Matrix/Trace.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/PerfectPairing/Matrix.lean,Mathlib/LinearAlgebra/Projectivization/Constructions.lean,Mathlib/NumberTheory/NumberField/ProductFormula.lean,Mathlib/NumberTheory/SiegelsLemma.lean,Mathlib/RingTheory/DividedPowers/SubDPIdeal.lean,Mathlib/SetTheory/Ordinal/Veblen.lean,Mathlib/Topology/Algebra/Module/Equiv.lean,Mathlib/Topology/Homeomorph/Lemmas.lean,Mathlib/Topology/Instances/Matrix.lean,scripts/bench_summary.lean 49 5 ['eric-wieser', 'github-actions', 'grunweg', 'leanprover-community-bot-assistant'] nobody
236-81750
7 months ago
259-57672
259 days ago
7-54661
7 days
28042 kckennylau
author:kckennylau
 feat(Topology/ValuativeRel): a topological basis indexed by pairs of elements --- The pullback PR of #27314 and #27163. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-ring-theory 140/23 Mathlib/RingTheory/Valuation/ValuativeRel.lean,Mathlib/Topology/Algebra/Valued/ValuativeRel.lean 2 3 ['github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] nobody
236-81704
7 months ago
246-46748
246 days ago
7-4998
7 days
27399 MoritzBeroRoos
author:MoritzBeroRoos
 chore: replace every usage of ⬝ᵥ (with old \cdot) by ·ᵥ (with \centerdot) Discussion at [zulip](https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/.5Ccdot.20!.3D.20.5Ccenterdot). Currently the abbreviations `\cdot` and `\centerdot` resolve to different, with the naked eye nearly undistinguishable symbols (despite the c in cdot surely standing for `center`..): - `\cdot` gives ⬝ [U+2B1D](https://www.compart.com/en/unicode/U+2B1D) "Black Very Small Square" - `\centerdot` gives · [U+00B7](https://www.compart.com/en/unicode/U+00B7) "Middle Dot" Mathlib mostly uses the `\centerdot` variant, except for the dotProduct notation and some probably unsuspecting people wanting \centerdot but getting \cdot in their comments and 6 uses of a notation using the raw `\cdot` without any subscript at `Mathlib\Topology\Homotopy\Product.lean`. This PR replaces the dot product `⬝ᵥ` with its `\centerdot` counterpart `·ᵥ`. The related PR [here](https://github.com/leanprover/vscode-lean4/pull/639) can then overwrite the `\cdot` abbreviation, to produce the same symbol as the `centerdot` abbreviation does. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict new-contributor 133/133 Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Combinatorics/Configuration.lean,Mathlib/Combinatorics/SimpleGraph/AdjMatrix.lean,Mathlib/Combinatorics/SimpleGraph/LapMatrix.lean,Mathlib/Data/Matrix/Block.lean,Mathlib/Data/Matrix/ConjTranspose.lean,Mathlib/Data/Matrix/Hadamard.lean,Mathlib/Data/Matrix/Mul.lean,Mathlib/Data/Matrix/Notation.lean,Mathlib/Data/Matrix/Reflection.lean,Mathlib/Data/Matrix/RowCol.lean,Mathlib/Data/Matrix/Vec.lean,Mathlib/LinearAlgebra/CrossProduct.lean,Mathlib/LinearAlgebra/Matrix/BilinearForm.lean,Mathlib/LinearAlgebra/Matrix/DotProduct.lean,Mathlib/LinearAlgebra/Matrix/Nondegenerate.lean,Mathlib/LinearAlgebra/Matrix/Orthogonal.lean,Mathlib/LinearAlgebra/Matrix/PosDef.lean,Mathlib/LinearAlgebra/Matrix/SchurComplement.lean,Mathlib/LinearAlgebra/Matrix/SesquilinearForm.lean,Mathlib/LinearAlgebra/Matrix/Trace.lean,Mathlib/LinearAlgebra/PerfectPairing/Matrix.lean,Mathlib/LinearAlgebra/Projectivization/Constructions.lean,Mathlib/Topology/Instances/Matrix.lean 25 6 ['MoritzBeroRoos', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant'] nobody
236-43582
7 months ago
259-57673
259 days ago
7-62439
7 days
28148 kckennylau
author:kckennylau
 feat(Matrix): Simproc and Rw-proc for Matrix Transpose Co-authored by Aaron Liu. ```lean example : !![1, 2, 3; 4, 5, 6]ᵀ = !![1, 4; 2, 5; 3, 6] := by rw [transpose_of% 2 3] example : !![1, 2, 3; 4, 5, 6]ᵀ = !![1, 4; 2, 5; 3, 6] := by rw [transpose_of] example : !![1, 2, 3; 4, 5, 6]ᵀ = !![1, 4; 2, 5; 3, 6] := by simp only [matrix_transpose] ``` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta 267/8 Mathlib.lean,Mathlib/Data/Matrix/Notation.lean,Mathlib/LinearAlgebra/UnitaryGroup.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Simproc/Matrix.lean,MathlibTest/Simproc/Matrix.lean,MathlibTest/matrix.lean,scripts/noshake.json 8 32 ['eric-wieser', 'github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot', 'plp127'] eric-wieser
assignee:eric-wieser
232-516
7 months ago
232-517
232 days ago
13-2028
13 days
26908 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Monoidal/DayConvolution): alternative ext principle for unitors Currently, our infrastructure for left/right unitors for Day convolution of functors `C ⥤ V` do not have satisfactory extensionality principle: the current way to characterize morphisms out of `U ⊛ F` is the default extensionality principle for Day convolution, which characterizes first such functors via functors out of `U ⊠ F`. Left unitors are then obtained using the fact `U ⊠ F` is a left Kan extension of a functor from `PUnit × C` (which is equivalent to `C`) but we did not record on its own this principle. Using the transitivity of left Kan extensions proved in #26899, we directly exhibit `U ⊛ F` as a left Kan extension of `F ⋙ tensorLeft (𝟙_ V)` along `tensorLeft (𝟙_ C)`. The unit of this Kan extension is composed exactly of the morphisms that appear in the [characterization of left unitors](https://leanprover-community.github.io/mathlib4_docs/Mathlib/CategoryTheory/Monoidal/DayConvolution.html#CategoryTheory.MonoidalCategory.DayConvolutionUnit.leftUnitor_hom_unit_app). We also slightly generalize the instances that express that external products with unitors are left Kan extensions, so that they can be used when taking external products with more complicated functors than currently. This is again useful when chaining extensionality lemmas for morphisms out of terms of the form `(F ⊛ U) ⊛ G`. We prove a similar thing for right unitors With this, it should be possible to have a much more satisfactory way of working with Day convolutions: this allows to "elimiinate" units without ending up with terms in an external product. --- - [ ] depends on: #26899 - [ ] depends on: #26906 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory 307/18 Mathlib/CategoryTheory/Functor/KanExtension/Basic.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution.lean 2 4 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
220-46862
7 months ago
220-46863
220 days ago
0-1812
30 minutes
27150 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Monoidal/DayConvolution): constructors for braided and symmetric structure on day convolutions monoidal categories Following the pattern in #27119, we give API to construct `BraidedCategory` and `SymmetricCategory` structures on a monoidal category equipped with a `LawfulDayConvolutionMonoidalCategoryStruct`. To achieve this, we introduce an other type class `LawfulDayConvolutionBraidedCategoryStruct` that bundles an associator isomorphism that behaves like the one constructed for functors in #27067. We provide a noncomputable constructor for this typeclass that takes as input fullness of the "realization" functor to a category of functors, and we show that the typeclasses are sufficient to define the desired structures. --- - [x] depends on: #27067 - [x] depends on: #26820 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory 826/9 Mathlib/CategoryTheory/Monoidal/DayConvolution.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution/Braided.lean 2 5 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
220-41901
7 months ago
275-71596
275 days ago
0-1002
16 minutes
27119 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Monoidal/DayConvolution): constructors for closed monoidal day convolution monoidal structures Following the pattern introduced in #26798 and #26820 and using results of #26879, we introduce a typeclass `LawfulDayConvolutionClosedMonoidalCategoryStruct` that encodes the data needed on a `LawfulDayConvolutionMonoidalCategoryStruct` to define well-behaved internal homs. We give a constructor assuming existence of relevant ends, and prove that this data defines a `MonoidalClosed` instance on the monoidal category structures one can deduce from `LawfulDayConvolutionMonoidalCategoryStruct`. --- - [x] depends on: #27079 - [x] depends on: #27091 - [x] depends on: #26879 - [x] depends on: #26820 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory 900/9 Mathlib/CategoryTheory/Monoidal/DayConvolution.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution/Closed.lean 2 6 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
219-55752
7 months ago
276-77064
276 days ago
0-1
1 second
28623 gilesgshaw
author:gilesgshaw
 feat(Logic/Basic): minor additions and simplification of proofs Add new theorems and simplify proofs. Specifically, we add the family of related theorems `apply_dite_iff_exists`, `apply_dite_iff_forall`, `apply_ite_iff_and` and `apply_ite_iff_or`. For each other 'family' of theorems in the file that is analogous to the above, we do the following - Simplify proofs where possible, e.g. by appealing to the new theorems - Complete the family, if any of the corresponding four are missing - Rename to ensure consistency with the above pattern --- merge-conflict t-logic new-contributor 83/55 Archive/Examples/IfNormalization/Result.lean,Archive/Examples/IfNormalization/WithoutAesop.lean,Mathlib/Algebra/ContinuedFractions/Computation/Translations.lean,Mathlib/Algebra/MvPolynomial/Variables.lean,Mathlib/Algebra/Notation/Indicator.lean,Mathlib/LinearAlgebra/Matrix/Rank.lean,Mathlib/Logic/Basic.lean,Mathlib/MeasureTheory/Measure/WithDensity.lean,Mathlib/SetTheory/Ordinal/Notation.lean 9 12 ['eric-wieser', 'gilesgshaw', 'github-actions', 'mathlib4-merge-conflict-bot', 'plp127'] awainverse
assignee:awainverse
219-49613
7 months ago
219-49614
219 days ago
10-61840
10 days
27933 grunweg
author:grunweg
 chore(OrdNode): format code example in code blocks Wrap them in code blocks (and unindent them; that indentation is not needed any more). This also avoids warnings from the linter in #27898. ------- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 459/212 Mathlib/Data/Ordmap/Ordnode.lean 1 4 ['eric-wieser', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] nobody
216-246
7 months ago
216-247
216 days ago
39-69478
39 days
26154 ADedecker
author:ADedecker
 refactor: add refactored APIs for algebraic filter bases This PR continues the work from #18437. Original PR: https://github.com/leanprover-community/mathlib4/pull/18437 merge-conflict t-topology 651/0 Mathlib.lean,Mathlib/Topology/Algebra/FilterBasis.lean,Mathlib/Topology/Algebra/FilterBasisNew.lean,Mathlib/Topology/Algebra/Nonarchimedean/Bases.lean,Mathlib/Topology/Algebra/Nonarchimedean/BasesNew.lean 5 3 ['ADedecker', 'github-actions', 'mathlib4-merge-conflict-bot'] PatrickMassot
assignee:PatrickMassot
213-61857
7 months ago
213-61858
213 days ago
87-79752
87 days
29330 plp127
author:plp127
 chore: define `Fin.cycleIcc` with conditions Redefine `Fin.cycleIcc` using conditionals instead of composing existing `Fin` operations together. Its worst-case runtime drops from O(n) to O(1). As a bonus, the definition no longer needs explaining. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-group-theory 61/68 Mathlib/GroupTheory/Perm/Fin.lean 1 10 ['JovanGerb', 'eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot', 'plp127', 'tb65536'] nobody
204-73454
6 months ago
204-73455
204 days ago
19-81030
19 days
21950 erdOne
author:erdOne
 feat(NumberTheory/Padics): the completion of `ℚ` at a finite place is `ℚ_[p]` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-number-theory 253/1 Mathlib.lean,Mathlib/Algebra/GroupWithZero/WithZero.lean,Mathlib/NumberTheory/Padics/HeightOneSpectrum.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/Topology/Algebra/Valued/WithVal.lean,Mathlib/Topology/Algebra/WithZeroMulInt.lean,Mathlib/Topology/Algebra/WithZeroTopology.lean 7 33 ['Ruben-VandeVelde', 'erdOne', 'faenuccio', 'github-actions', 'leanprover-community-bot-assistant', 'pechersky', 'smmercuri', 'xroblot'] nobody
202-48564
6 months ago
283-48501
283 days ago
73-13048
73 days
27214 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Limits/Shapes/Pullback/Categorical): Categorical pullback squares In this PR, we give the definition and first basic properties of categorical pullback squares. Using our previous work on `CategoricalPullback`, we define a typeclass `CatPullbackSquare T L R B` that asserts that a given `CatCommSq T L R B` is a "pullback square": this is the data of a chosen adjoint equivalence to the canonical functor from the top left corner of the square to the categorical pulback of its leg. Using this equivalence, be derive a universal property for functors from `X`with values in the top left corner of the square: they are equivalent to `CatCommSqOver R B X`, the category of categorical commutative squares over the cospan `R, B` with top left corner `X`. We prove some coherence result for this equivalence, most notably an isomorphism that, given `S : CatCommSqOver R B X`, bundles the two commutative triangles formed by the induced functor, and the coherence between the squares that these isomorphisms satisfy: this is conveniently bundled in the data of a single isomorphisms of `CatCommSqOver R B X`. Finally, we provide a `Prop`-class `IsCatPullbackSquare` that merely asserts the existence (via `Nonempty`) of the relevant data: we show that it is tautotogically equivalent to the propopsition that the canonical functor to the categorical pullback is an equivalence. --- - [ ] depends on: #26679 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory 786/1 Mathlib.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Basic.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Square.lean 3 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
199-38646
6 months ago
199-38647
199 days ago
0-4775
1 hour
26466 robin-carlier
author:robin-carlier
 feat(AlgebraicTopology/SimplexCategory/Augmented): the canonical monoid object in the augmented simplex category Show that in the augmented simplex category, `⦋0⦌` is an internal monoid object. Future work will show that this is in fact the universal monoid object: for any monoidal category `C`, evaluation at `⦋0⦌` induces an equivalence of categories between `Mon_ C` and the category of monoidal functors from `AugmentedSimplexCategory` to `C`. The resulting augmented cosimplicial object one gets from this construction is sometimes called the "monoidal bar construction" attached to a monoid. This PR was split from #25743. --- - [ ] depends on: #25743 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebraic-topology t-category-theory 571/111 Mathlib.lean,Mathlib/AlgebraicTopology/SimplexCategory/Augmented.lean,Mathlib/AlgebraicTopology/SimplexCategory/Augmented/Basic.lean,Mathlib/AlgebraicTopology/SimplexCategory/Augmented/Mon_.lean,Mathlib/AlgebraicTopology/SimplexCategory/Augmented/Monoidal.lean,Mathlib/AlgebraicTopology/SimplexCategory/Basic.lean 6 4 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
198-58048
6 months ago
293-65332
293 days ago
0-1708
28 minutes
26578 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Limits/Pullbacks/Categorical/CatCospanTransform): adjunctions of categorical cospans We build upon the bicategory-like structure developed in #26447 and #26412 to define the notion of adjunctions of categorical cospans. This is a structure encoding the data of two `CatCospanTransform`s, along with the usual unit and counit morphisms as part of the data, satisfying the usual left and right triangle identities. We provide basic API for these, such as extracting adjunctions between individual components. We also provide a proof that the notion satisfies a "coherence": with our chosen constructor, the forward direction of the structure `CatCommSq` on the left adjoints correspond to the inverse of the square for the right adjoints through `mateEquiv`. These adjunctions will be used as a substrate for defining equivalences of categorical cospans in a future PR: such an equivalence will be a structure extending a `CatCospanAdjunction` with isomorphisms data on the unit and co-unit (we will however provide alternative constructors in sync with the constructor for equivalences of categories). --- - [x] depends on: #26447 - [x] depends on: #26547 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory large-import 205/0 Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/CatCospanTransform.lean 1 5 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
197-61273
6 months ago
289-70445
289 days ago
0-625
10 minutes
23621 astrainfinita
author:astrainfinita
 chore: deprecate `LinearOrderedComm{Monoid, Group}WithZero` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #20676 merge-conflict t-algebra t-order
label:t-algebra$
 261/205 Archive/Imo/Imo1998Q2.lean,Counterexamples/LinearOrderWithPosMulPosEqZero.lean,Mathlib/Algebra/Order/Field/Canonical.lean,Mathlib/Algebra/Order/Field/Rat.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/GroupWithZero/Finset.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Order/Nonneg/Field.lean,Mathlib/Algebra/Order/Nonneg/Ring.lean,Mathlib/Algebra/Order/Ring/Nat.lean,Mathlib/Combinatorics/Additive/PluenneckeRuzsa.lean,Mathlib/Combinatorics/SimpleGraph/Triangle/Basic.lean,Mathlib/Data/ENNReal/Basic.lean,Mathlib/Data/NNRat/Lemmas.lean,Mathlib/Data/NNReal/Defs.lean,Mathlib/Data/Rat/Cast/Order.lean,Mathlib/FieldTheory/IntermediateField/Adjoin/Defs.lean,Mathlib/FieldTheory/RatFunc/AsPolynomial.lean,Mathlib/GroupTheory/ArchimedeanDensely.lean,Mathlib/NumberTheory/EllipticDivisibilitySequence.lean,Mathlib/NumberTheory/FunctionField.lean,Mathlib/NumberTheory/Ostrowski.lean,Mathlib/RingTheory/Valuation/Archimedean.lean,Mathlib/RingTheory/Valuation/Basic.lean,Mathlib/RingTheory/Valuation/ExtendToLocalization.lean,Mathlib/RingTheory/Valuation/Integers.lean,Mathlib/RingTheory/Valuation/Integral.lean,Mathlib/RingTheory/Valuation/Minpoly.lean,Mathlib/RingTheory/Valuation/Quotient.lean,Mathlib/RingTheory/Valuation/RankOne.lean,Mathlib/RingTheory/Valuation/ValExtension.lean,Mathlib/RingTheory/Valuation/ValuationRing.lean,Mathlib/RingTheory/Valuation/ValuationSubring.lean,Mathlib/SetTheory/Cardinal/Order.lean,Mathlib/Topology/Algebra/Valued/LocallyCompact.lean,Mathlib/Topology/Algebra/Valued/NormedValued.lean,Mathlib/Topology/Algebra/Valued/ValuationTopology.lean,Mathlib/Topology/Algebra/Valued/ValuedField.lean,Mathlib/Topology/Algebra/Valued/WithVal.lean,Mathlib/Topology/Algebra/WithZeroTopology.lean,Mathlib/Topology/UnitInterval.lean,MathlibTest/instance_diamonds.lean,scripts/noshake.json 44 24 ['YaelDillies', 'astrainfinita', 'github-actions', 'grunweg', 'leanprover-bot', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] kbuzzard
assignee:kbuzzard
194-42988
6 months ago
365-15361
365 days ago
5-42380
5 days
27990 kckennylau
author:kckennylau
 feat(Counterexamples): a nontrivial valuation with discrete topology This file constructs a valuation on `K[X]` satisfying `IsValuativeTopology K[X] ∧ Nonempty (valuation K[X]).RankOne ∧ IsNontrivial K[X] ∧ DiscreteTopology K[X]`, and proves that `IsValuativeTopology F ∧ IsNontrivial F ∧ DiscreteTopology F` is not possible if `F` is a field. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-ring-theory 172/0 Counterexamples.lean,Counterexamples/DiscreteTopologyWithNontrivialValuation.lean 2 14 ['github-actions', 'grunweg', 'kckennylau', 'mathlib4-merge-conflict-bot', 'pechersky'] nobody
186-45119
6 months ago
186-45120
186 days ago
67-79609
67 days
28132 dupuisf
author:dupuisf
 feat: preliminary `grind` tags for `IsUnit` This PR adds preliminary `grind` tags for the `IsUnit` predicate. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 61/17 Mathlib/Algebra/Group/Action/Units.lean,Mathlib/Algebra/Group/Units/Defs.lean,Mathlib/Algebra/GroupWithZero/Units/Basic.lean,Mathlib/Algebra/Ring/Units.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Order.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/Rpow/Basic.lean 6 3 ['github-actions', 'mathlib4-merge-conflict-bot'] kim-em
assignee:kim-em
163-21717
5 months ago
163-21718
163 days ago
80-71575
80 days
26827 pechersky
author:pechersky
 feat(Analysis/Normed/ValuativeRel): helper instance for NormedField --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #26713 - [x] depends on: #26826 merge-conflict t-algebra t-number-theory t-analysis
label:t-algebra$
 211/27 Mathlib.lean,Mathlib/Analysis/Normed/ValuativeRel.lean,Mathlib/Topology/Algebra/Valued/ValuativeRel.lean 3 34 ['ADedecker', 'adamtopaz', 'erdOne', 'github-actions', 'kbuzzard', 'kckennylau', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'pechersky'] kbuzzard
assignee:kbuzzard
155-50321
5 months ago
155-50321
155 days ago
122-67006
122 days
22662 plp127
author:plp127
 feat: Localization.Away.lift (computably) This PR adds `Localization.Away.lift'` and `Localization.Away.lift`, computable alternatives to `Localization.awayLift`. --- - [x] depends on: #24791 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 74/0 Mathlib/RingTheory/Localization/Away/Basic.lean 1 18 ['eric-wieser', 'github-actions', 'grunweg', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'plp127', 'vihdzp'] kim-em
assignee:kim-em
148-72980
4 months ago
148-72981
148 days ago
257-28368
257 days
24850 pechersky
author:pechersky
 feat(Topology/UniformSpace/Ultra): uniform spaces induced by pseudometrics are ultra if system is ultra Any uniform space has a natural system of pseudometrics definable on it, comprised of those pseudometrics constructed from a descending chain of equivalence relation entourages. In a nonarchimedean uniformity, this pseudometric system induces the uniformity. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #23111 merge-conflict t-topology 509/1 Mathlib.lean,Mathlib/Topology/MetricSpace/BundledFun.lean,Mathlib/Topology/UniformSpace/Ultra/Pseudometrizable.lean 3 9 ['ADedecker', 'fpvandoorn', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'pechersky'] urkud
assignee:urkud
148-72808
4 months ago
148-72809
148 days ago
177-42245
177 days
25974 scholzhannah
author:scholzhannah
 feat(Topology/Compactness/CompactlyCoherentSpace): compact coherentification (k-ification) This PR defines the notion of turning an arbitrary topological space into a compactly coherent space. Compactly coherent spaces are commonly referred to as "compactly generated spaces" or "k-spaces" in the literature while the operation of turning a space into such as space is called the "k-ification". There are however three different notions that are described with this name. To disambiguate we use the names "compactly coherent space" and "compactcoherentification" here. See [this wikipedia page](https://en.wikipedia.org/wiki/Compactly_generated_space) for an explanation of these notions. This PR continues the work from #25318. Original PR: https://github.com/leanprover-community/mathlib4/pull/25318 Co-authored-by: Floris van Doorn merge-conflict t-topology large-import 174/5 Mathlib/Topology/Compactness/CompactlyCoherentSpace.lean 1 5 ['github-actions', 'joelriou', 'mathlib4-merge-conflict-bot', 'scholzhannah'] ADedecker
assignee:ADedecker
148-72640
4 months ago
148-72641
148 days ago
147-64645
147 days
26914 quangvdao
author:quangvdao
 feat(Data/PFunctor/Univariate): more definitions for univariate `PFunctor` This PR defines several basic definitions of `PFunctor`, including zero, one, constants, monomials, coproduct (sum), product, sigma, pi, tensor product, universe lifting, and equivalence. We also add: (1) simple lemmas connecting the basic definitions, (2) an automatically derived ext lemma for `PFunctor` via `@[ext]` attribute Some things I'm not clear on: - I define `HAdd` and `HMul` instances for coproduct and product of poly functors having different universe levels. Should I also define `Add` and `Mul` instances for poly functors having the same universe level? - Is it ok to define notation for tensor product, i.e. `@[inherit_doc] scoped infixr:80 " ⊗ " => tensor`? I'm worried it might clash with other notation. - Need a double-check on the priority of notation. Some future definitions to add: - Various equivalences arising from arithmetic identities, e.g., `P + 0 ≃ₚ P`. - Definitions of Lenses and Charts (each of them will be a file or even a folder) - Exponential objects (corresponding to both `prod` and `tensor`) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 144/5 Mathlib/Data/PFunctor/Univariate/Basic.lean 1 20 ['alexkeizer', 'eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot', 'quangvdao'] eric-wieser
assignee:eric-wieser
148-72286
4 months ago
148-72287
148 days ago
133-24576
133 days
28125 nonisomorphiclinearmap
author:nonisomorphiclinearmap
 feat(Combinatorics): basic definition of simplicial complexes This PR introduces the basic definition of a finite (abstract) simplicial complex, located in Mathlib/Combinatorics/SimplicialComplex/Basic.lean. --- This is our first contribution to mathlib. This work was done as part of the Fields Institute Summer Undergraduate Program on formalization in topological combinatorics. Eventually, we aim to formalize Lovasz's proof of the Kneser Conjecture and this is a small stepping stone in that direction. Some other commits will shortly depend on this one. We would like to acknowledge the Fields Institute for Research in Mathematical Sciences for their sponsorship. We would also like to thank our supervisors, Professor Chris Kapulkin and Mr. Daniel Carranza, for their guidance and support throughout this project. We would also like to thank our group members Tom Lindquist and Quang Minh Nguyen for our fruitful discussions. merge-conflict t-combinatorics new-contributor 374/0 Mathlib.lean,Mathlib/Combinatorics/SimplicialComplex/Basic.lean,Mathlib/Combinatorics/SimplicialComplex/Category.lean,Mathlib/Combinatorics/SimplicialComplex/FacePoset.lean,Mathlib/Combinatorics/SimplicialComplex/Hom.lean 5 2 ['github-actions', 'mathlib4-merge-conflict-bot'] awainverse
assignee:awainverse
148-71981
4 months ago
148-71982
148 days ago
99-64548
99 days
28871 JaafarTanoukhi
author:JaafarTanoukhi
 feat(Combinatorics/Digraph): Tournaments Define orientations and tournaments. Related to #26771. Co-authored-by: Rida Hamadani --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-combinatorics new-contributor 62/0 Mathlib.lean,Mathlib/Combinatorics/Digraph/Orientation.lean,Mathlib/Combinatorics/Digraph/Tournament.lean 3 6 ['JaafarTanoukhi', 'Rida-Hamadani', 'SnirBroshi', 'github-actions', 'mathlib4-merge-conflict-bot'] kmill
assignee:kmill
148-71828
4 months ago
148-71829
148 days ago
71-37436
71 days
29526 llllvvuu
author:llllvvuu
 feat: `Multiset.map f` identifies `f` up to permutation Motivation: Reason about `Fintype`-indexed families via `Multiset` equality. Example use case 1: ```lean theorem Matrix.IsHermitian.cfc_eigenvalues {d : Type*} [Fintype d] [DecidableEq d] {M : Matrix d d 𝕜} (hM : M.IsHermitian) (f : ℝ → ℝ) (hcfc : Matrix.IsHermitian (cfc f M) := cfc_predicate f M) : ∃ (e : d ≃ d), hcfc.eigenvalues = f ∘ hM.eigenvalues ∘ e := by have := hcfc.roots_charpoly_eq_eigenvalues.symm rw [hM.charpoly_cfc_eq f, Polynomial.roots_prod] at this; swap · simp [Finset.prod_ne_zero_iff, Polynomial.X_sub_C_ne_zero] simp_rw [Polynomial.roots_X_sub_C, Multiset.bind_singleton] at this have he := (Multiset.compTriple_equivOfMapUnivEq this).comp_eq simp_rw [← Function.comp_def RCLike.ofReal, ← Function.comp_def f, Function.comp_assoc] at he exact ⟨_, RCLike.ofReal_injective.comp_left he.symm⟩ ``` Example use case 2 (on top of https://github.com/leanprover-community/mathlib4/pull/29610): ```lean theorem LinearMap.Eigenbasis.μ_equiv {ι ι' R G : Type*} [Fintype ι] [Fintype ι'] [CommRing R] [IsDomain R] [AddCommGroup G] [Module R G] [Module.Free R G] [Module.Finite R G] {f : Module.End R G} (B₁ : f.Eigenbasis ι) (B₂ : f.Eigenbasis ι') : ∃ e : ι ≃ ι', B₁.μ = B₂.μ ∘ e := by classical have := congr(Polynomial.roots $(B₁.charpoly_eq.symm.trans B₂.charpoly_eq)) rw [Polynomial.roots_prod, Polynomial.roots_prod] at this; rotate_left · simp [Finset.prod_ne_zero_iff, Polynomial.X_sub_C_ne_zero] · simp [Finset.prod_ne_zero_iff, Polynomial.X_sub_C_ne_zero] simp_rw [Polynomial.roots_X_sub_C, Multiset.bind_singleton] at this exact ⟨Multiset.equivOfMapUnivEq this, (Multiset.compTriple_equivOfMapUnivEq this).comp_eq.symm⟩ ``` Co-authored-by: Aristotle Harmonic --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 35/0 Mathlib/Data/Multiset/Fintype.lean 1 9 ['Ruben-VandeVelde', 'github-actions', 'llllvvuu', 'mathlib4-merge-conflict-bot', 'vihdzp', 'wwylele'] pechersky
assignee:pechersky
148-71790
4 months ago
148-71791
148 days ago
69-23034
69 days
29947 JaafarTanoukhi
author:JaafarTanoukhi
 feat(Combinatorics/Digraph): Maps Ported `SimpleGraph/Maps.lean` to `Digraph/Maps.lean` for future PRs related to issue #[26771](https://github.com/leanprover-community/mathlib4/issues/26771) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-combinatorics new-contributor 476/0 Mathlib.lean,Mathlib/Combinatorics/Digraph/Maps.lean 2 2 ['github-actions', 'mathlib4-merge-conflict-bot'] awainverse
assignee:awainverse
148-71194
4 months ago
148-71195
148 days ago
54-85998
54 days
31356 adomani
author:adomani
 feat: add inspect-like functions Produces a tree-like formatting for `Syntax`, `Expr` and `InfoTree`. Especially for the `InfoTree`s, there are *many* parts of it that do not get printed. For instance, this is how the `InfoTree`s of `set_option linter.missingDocs true` get printed: ```lean inspectIT set_option linter.missingDocs true /- commandCtx |-Info.ofCommandInfo: Lean.Elab.Command.elabSetOption, 'set_option…gDocs true' | |-Info.ofCompletionInfo.CompletionInfo.option 'set_option…issingDocs' | |-Info.ofOptionInfo: linter.missingDocs, Linter.linter.missingDocs -/ ``` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta 720/0 Mathlib.lean,Mathlib/Util/Inspect.lean,MathlibTest/Inspect.lean 3 3 ['github-actions', 'mathlib4-merge-conflict-bot', 'plp127'] kim-em
assignee:kim-em
148-66215
4 months ago
148-66216
148 days ago
11-62509
11 days
6993 jjaassoonn
author:jjaassoonn
 feat: lemmas about `AddMonoidAlgebra.{divOf, modOf}` --- - [x] depends on: #7582 - [x] depends on: #8975 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 147/3 Mathlib/Algebra/MonoidAlgebra/Division.lean,Mathlib/Data/Finsupp/Basic.lean,Mathlib/Data/MvPolynomial/Basic.lean,Mathlib/Data/MvPolynomial/CommRing.lean,Mathlib/Data/MvPolynomial/Division.lean 5 42 ['YaelDillies', 'alreadydone', 'digama0', 'eric-wieser', 'github-actions', 'jjaassoonn', 'leanprover-community-mathlib4-bot'] nobody
148-45139
4 months ago
818-49892
818 days ago
103-330
103 days
9339 FMLJohn
author:FMLJohn
 feat(RingTheory/GradedAlgebra/HomogeneousIdeal): given a finitely generated homogeneous ideal of a graded semiring, construct a finite spanning set for the ideal which only contains homogeneous elements --- - [ ] depends on: #8187 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-ring-theory 402/4 Mathlib.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/GradedMonoid.lean,Mathlib/Algebra/Module/GradeZeroModule.lean,Mathlib/RingTheory/Finiteness.lean,Mathlib/RingTheory/GradedAlgebra/Basic.lean,Mathlib/RingTheory/GradedAlgebra/HomogeneousIdeal.lean,Mathlib/RingTheory/GradedAlgebra/Noetherian.lean 8 11 ['FMLJohn', 'github-actions', 'jjaassoonn', 'leanprover-community-mathlib4-bot'] nobody
148-45092
4 months ago
832-50070
832 days ago
6-63597
6 days
10349 Shamrock-Frost
author:Shamrock-Frost
 refactor(CategoryTheory/MorphismProperty): some clean-ups We make explicit some of the galois connections/closure operators in the existing MorphismProperty file, rewrite some proofs to take advantage of these structures, and change map/inverseImage by (1) swapping their argument order, for consistency with Set.range and Set.preimage and (2) making "map" perform the strict, evil map while "essMap" (previously called map) forms the closure of the image under isomorphisms. Finally we add `IsMultiplicative` instances for isos/epis/monos, with an eye towards constructing the wide subcategory on these classes of maps. --- - [x] depends on: #10347 - [x] depends on: #10348 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory 474/318 Mathlib/CategoryTheory/Localization/Composition.lean,Mathlib/CategoryTheory/Localization/LocalizerMorphism.lean,Mathlib/CategoryTheory/MorphismProperty.lean,Mathlib/Data/Set/Lattice.lean,Mathlib/Order/Closure.lean,Mathlib/Order/Hom/Basic.lean,Mathlib/Order/Hom/CompleteLattice.lean,Mathlib/Order/RelIso/Basic.lean 8 1 ['leanprover-community-mathlib4-bot'] nobody
148-45050
4 months ago
799-13794
799 days ago
0-418
6 minutes
26890 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Monoidal/DayConvolution): more API for `DayFunctor` We provide some lemmas that helps characterizing the monoidal structure on `DayFunctor`, they are special cases of the lemmas for `LawfulDayConvolutionMonoidalCategoryStruct`. --- - [x] depends on: #26824 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory 1372/19 Mathlib.lean,Mathlib/CategoryTheory/Functor/KanExtension/Basic.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution/DayFunctor.lean 4 5 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
148-44442
4 months ago
282-69451
282 days ago
0-517
8 minutes
24016 plp127
author:plp127
 feat: fine uniformity Adds the fine uniformity, and proves some properties. --- - [ ] depends on: #24096 for showing the induced topology is equal on completely regular spaces [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology 283/0 Mathlib.lean,Mathlib/Topology/UniformSpace/FineUniformity.lean,Mathlib/Topology/UniformSpace/Uniformizable.lean 3 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
143-4809
4 months ago
365-13559
365 days ago
2-85335
2 days
26912 pechersky
author:pechersky
 chore(Algebra/Ring/Subring): simp tag `Subring.smul_def` s-multiplying by a subtype is easiest to manipulate when both terms are in the ambient type. Many places that had to use the _def lemma for a rewrite, or to include it in a simp set, no longer have to. Ported from #25308 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) I found this being not-simp frustrating when talking about submodules over a valuation subring. merge-conflict t-algebra
label:t-algebra$
 67/66 Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Field/Subfield/Basic.lean,Mathlib/Algebra/Group/Subgroup/Actions.lean,Mathlib/Algebra/Group/Submonoid/MulAction.lean,Mathlib/Algebra/Module/LocalizedModule/Basic.lean,Mathlib/Algebra/Module/LocalizedModule/Exact.lean,Mathlib/Algebra/Module/LocalizedModule/IsLocalization.lean,Mathlib/Algebra/Module/LocalizedModule/Submodule.lean,Mathlib/Algebra/Ring/Periodic.lean,Mathlib/Algebra/Ring/Subring/Basic.lean,Mathlib/Algebra/Ring/Subsemiring/Basic.lean,Mathlib/Analysis/CStarAlgebra/Basic.lean,Mathlib/FieldTheory/KummerExtension.lean,Mathlib/GroupTheory/GroupAction/Defs.lean,Mathlib/GroupTheory/GroupAction/MultiplePrimitivity.lean,Mathlib/GroupTheory/GroupAction/MultipleTransitivity.lean,Mathlib/GroupTheory/GroupAction/SubMulAction/OfFixingSubgroup.lean,Mathlib/GroupTheory/GroupAction/SubMulAction/OfStabilizer.lean,Mathlib/LinearAlgebra/RootSystem/Irreducible.lean,Mathlib/LinearAlgebra/RootSystem/WeylGroup.lean,Mathlib/RingTheory/Etale/Kaehler.lean,Mathlib/RingTheory/Ideal/Over.lean,Mathlib/RingTheory/LocalProperties/Projective.lean,Mathlib/RingTheory/Localization/InvSubmonoid.lean,Mathlib/RingTheory/OreLocalization/Basic.lean 25 26 ['artie2000', 'eric-wieser', 'github-actions', 'j-loreaux', 'kckennylau', 'leanprover-bot', 'leanprover-radar', 'linesthatinterlace', 'mathlib4-merge-conflict-bot', 'pechersky'] joelriou
assignee:joelriou
122-17593
4 months ago
143-53542
143 days ago
60-67125
60 days
30375 sinhp
author:sinhp
 feat(CategoryTheory): Basics of Locally Cartesian Closed Categories Supersedes https://github.com/leanprover-community/mathlib4/pull/22321 This PR defines locally cartesian closed categories in terms of existence of the pushforward functors (right adjoint to the pullback functor) for all morphisms. We develop basic API and prove the following: 1. Existence of the pushforward functors is equivalent to cartesian closed slices. 2. Any locally cartesian closed category with a terminal object is cartesian closed. 3. The slices of a locally cartesian closed category are locally cartesian closed. --- - [ ] depends on: #31033 - [ ] depends on: #30373 - [ ] depends on: #31332 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict 703/0 Mathlib.lean,Mathlib/CategoryTheory/LocallyCartesianClosed/Basic.lean,Mathlib/CategoryTheory/LocallyCartesianClosed/ChosenPullbacksAlong.lean,Mathlib/CategoryTheory/LocallyCartesianClosed/ExponentiableMorphism.lean,Mathlib/CategoryTheory/LocallyCartesianClosed/Sections.lean 5 9 ['Jlh18', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'sinhp'] nobody
101-38994
3 months ago
189-45290
189 days ago
0-2073
34 minutes
33126 CoolRmal
author:CoolRmal
 feat: function composition preserves boundedness This PR adds the following theorem: if the range of a function `g` is bounded above, then `g ∘ f` is bounded above for all functions `f`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order merge-conflict 12/0 Mathlib/Order/Bounds/Basic.lean 1 2 ['github-actions', 'mathlib4-merge-conflict-bot'] bryangingechen
assignee:bryangingechen
90-48445
3 months ago
90-48446
90 days ago
27-6197
27 days
29587 uniwuni
author:uniwuni
 feat(GroupTheory/Finiteness): define finitely generated semigroups We define finitely generated semigroups and basics similarly to monoids and groups and prove that semigroups and monoids remain finitely generated when a congruence is quotiented out. This will be important when further developing semigroup theory. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-group-theory 259/14 Mathlib/Algebra/Group/Submonoid/Defs.lean,Mathlib/GroupTheory/Finiteness.lean 2 4 ['github-actions', 'mathlib4-merge-conflict-bot', 'plp127', 'uniwuni'] dupuisf
assignee:dupuisf
88-60014
2 months ago
190-64918
190 days ago
25-78230
25 days
29014 ShreckYe
author:ShreckYe
 feat(Data/List/Scan): some theorems that relate `scanl` with `foldl` I am not sure which is the best form of `getElem_scanl_eq_foldl_take` here, so I added several alternative forms. Feel free to remove any of them if necessary. merge-conflict t-data 35/0 Mathlib/Data/List/Scan.lean 1 15 ['ShreckYe', 'github-actions', 'mathlib4-merge-conflict-bot', 'themathqueen', 'vlad902'] pechersky
assignee:pechersky
84-39238
2 months ago
158-4283
158 days ago
74-62390
74 days
16074 Rida-Hamadani
author:Rida-Hamadani
 feat: combinatorial maps and planar graphs We define combinatorial maps, then we define planar graph using combinatorial maps. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-combinatorics 243/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Planar.lean,Mathlib/Data/CombinatorialMap.lean 3 29 ['MrBrain295', 'Parcly-Taxel', 'Rida-Hamadani', 'github-actions', 'lambda-fairy', 'leanprover-community-bot-assistant'] kmill
assignee:kmill
76-1813
2 months ago
286-37
286 days ago
72-50365
72 days
9820 jjaassoonn
author:jjaassoonn
 feat(RingTheory/GradedAlgebra/HomogeneousIdeal): generalize to homogeneous submodule The definitions, constructions and theorems in `HomogeneousIdeal.lean` are generalized to a homogeneous submodules. So say $R$ is a ring and $M \cong \bigoplus_{i} M_i$ is an $R$-module. Then a homogeneous $R$-submodule of $M$ is an $R$-submodule $N$ such that for all $i$ and $n \in N$, $n_i \in N$. Note that this notion doesn't actually require $R$ to be graded and $M$ is a graded module. But for more interesting lemmas, we do need that $M$ is graded $R$-module. We bake the fact $R$ is graded into the definition of homogeneous submodule, otherwise, `CompleteLattice HomogeneousSubmodule` cannot find the order of synthesis (the proof depends on that $R$ is graded) All definitions/constructions/theorems have a copy for ideals as well, this is to make sure dot notation still works. The motivation of this generalization is graded quotient module --- - [x] depends on:#18728 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-ring-theory 516/185 Mathlib/Algebra/Module/GradedModule.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Scheme.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Topology.lean,Mathlib/RingTheory/GradedAlgebra/Homogeneous/Ideal.lean,Mathlib/RingTheory/GradedAlgebra/Homogeneous/Submodule.lean,Mathlib/RingTheory/GradedAlgebra/Radical.lean,scripts/nolints_prime_decls.txt 7 3 ['github-actions', 'leanprover-community-bot-assistant'] nobody
66-65667
2 months ago
286-2508
286 days ago
52-61657
52 days
34931 eric-wieser
author:eric-wieser
 perf: make TensorProduct.lift irreducible with a unification hint --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
 6/2 Mathlib/LinearAlgebra/TensorProduct/Basic.lean 1 7 ['eric-wieser', 'github-actions', 'leanprover-radar', 'mathlib-merge-conflicts'] erdOne
assignee:erdOne
63-33687
2 months ago
63-33688
63 days ago
5-66655
5 days
33020 FormulaRabbit81
author:FormulaRabbit81
 chore(Topology): Deprecate file --- - [x] depends on: #30851 deprecation [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology large-import merge-conflict 82/49 Mathlib/Topology/Compactness/HilbertCubeEmbedding.lean,Mathlib/Topology/MetricSpace/HausdorffAlexandroff.lean,Mathlib/Topology/MetricSpace/PiNat.lean 3 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
61-10298
2 months ago
119-84087
119 days ago
0-14835
4 hours
33281 michelsol
author:michelsol
 feat(Analysis/SpecialFunctions/Integrals): integral of 1/sqrt(1-x^2) and its integrability. Add the integral of the derivative of arcsin and its integrability. --- - [ ] depends on: #33280 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor merge-conflict t-analysis 59/0 Mathlib/Analysis/SpecialFunctions/Integrability/Basic.lean,Mathlib/Analysis/SpecialFunctions/Integrals/Basic.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/FundThmCalculus.lean 3 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot'] nobody
60-65492
2 months ago
112-33317
112 days ago
0-2872
47 minutes
34156 zcyemi
author:zcyemi
 feat(Analysis/Convex/Between): add lemmas on convex combination of mem simplex interior --- I add three lemmas of convex combinations preserving membership in the interior of a simplex. And also open a zulip thread [#mathlib4 > Best place for convex combination and simplex interior](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Best.20place.20for.20convex.20combination.20and.20simplex.20interior/with/568558406) deps: - [ ] depends on: #33852 t-analysis merge-conflict 170/0 Mathlib/Analysis/Convex/Between.lean,Mathlib/LinearAlgebra/AffineSpace/Independent.lean 2 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
60-41409
2 months ago
60-41409
60 days ago
0-2935
48 minutes
25980 Multramate
author:Multramate
 refactor(Algebra/Group/Submonoid/Operations): rename restrict to domRestrict and add restrict And update the documentation for consistency t-group-theory merge-conflict 145/123 Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/Algebra/Group/Subgroup/Ker.lean,Mathlib/Algebra/Group/Submonoid/Operations.lean,Mathlib/GroupTheory/FiniteAbelian/Duality.lean,Mathlib/GroupTheory/MonoidLocalization/Basic.lean,Mathlib/GroupTheory/MonoidLocalization/Maps.lean,Mathlib/GroupTheory/MonoidLocalization/MonoidWithZero.lean,Mathlib/GroupTheory/PGroup.lean,Mathlib/GroupTheory/QuotientGroup/Basic.lean,Mathlib/GroupTheory/Transfer.lean,Mathlib/LinearAlgebra/RootSystem/WeylGroup.lean,Mathlib/NumberTheory/NumberField/CMField.lean,Mathlib/NumberTheory/NumberField/Ideal/Basic.lean,Mathlib/RingTheory/Localization/Defs.lean 14 10 ['Multramate', 'copilot-pull-request-reviewer', 'github-actions', 'mathlib-merge-conflicts'] nobody
58-15537
1 month ago
58-15538
58 days ago
5-13758
5 days
25981 Multramate
author:Multramate
 feat(GroupTheory/GroupAction/Basic): define homomorphisms of fixed subgroups induced by homomorphisms of groups This PR continues the work from #10126. Original PR: https://github.com/leanprover-community/mathlib4/pull/10126 t-group-theory large-import merge-conflict 218/144 Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/Algebra/Group/Subgroup/Ker.lean,Mathlib/Algebra/Group/Submonoid/Operations.lean,Mathlib/Algebra/Ring/Action/Submonoid.lean,Mathlib/GroupTheory/FiniteAbelian/Duality.lean,Mathlib/GroupTheory/GroupAction/Defs.lean,Mathlib/GroupTheory/MonoidLocalization/Basic.lean,Mathlib/GroupTheory/MonoidLocalization/Maps.lean,Mathlib/GroupTheory/MonoidLocalization/MonoidWithZero.lean,Mathlib/GroupTheory/PGroup.lean,Mathlib/GroupTheory/QuotientGroup/Basic.lean,Mathlib/GroupTheory/Transfer.lean,Mathlib/LinearAlgebra/RootSystem/WeylGroup.lean,Mathlib/NumberTheory/NumberField/CMField.lean,Mathlib/NumberTheory/NumberField/Ideal/Basic.lean,Mathlib/RingTheory/Localization/Defs.lean 16 8 ['copilot-pull-request-reviewer', 'github-actions', 'mathlib-merge-conflicts'] nobody
58-15536
1 month ago
58-15536
58 days ago
4-79090
4 days
33795 alreadydone
author:alreadydone
 feat(Topology/Sheaves): LocalPredicate prerequisite for étalé spaces --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology merge-conflict 418/143 Mathlib/AlgebraicGeometry/ProjectiveSpectrum/StructureSheaf.lean,Mathlib/Geometry/Manifold/Sheaf/Smooth.lean,Mathlib/Logic/Equiv/Basic.lean,Mathlib/Topology/Sheaves/LocalPredicate.lean,Mathlib/Topology/Sheaves/Sheafify.lean,Mathlib/Topology/Sheaves/Stalks.lean 6 12 ['adamtopaz', 'alreadydone', 'dagurtomas', 'github-actions', 'mathlib-merge-conflicts'] adamtopaz
assignee:adamtopaz
57-79570
1 month ago
57-79571
57 days ago
34-16498
34 days
34674 Citronhat
author:Citronhat
 feat(Algebra/Order/Ring): replace ENNReal lemmas with WithTop versions * Add `WithTop` versions of basic multiplicative order lemmas. * Use the new `WithTop` lemmas to replace `ENNReal` proofs and address six TODOs. * Fix a typo in the `pos_of_ne_zero` alias name. new-contributor t-algebra merge-conflict
label:t-algebra$
 46/15 Mathlib/Algebra/Order/Monoid/Canonical/Defs.lean,Mathlib/Algebra/Order/Ring/WithTop.lean,Mathlib/Data/ENNReal/Operations.lean 3 5 ['Citronhat', 'Ruben-VandeVelde', 'github-actions', 'mathlib-merge-conflicts'] Ruben-VandeVelde
assignee:Ruben-VandeVelde
57-59440
1 month ago
57-59441
57 days ago
17-1225
17 days
33746 ster-oc
author:ster-oc
 feat(Algebra/Module/ZLattice): align `ZSpan.floor` to `Int.floor` API This PR adds some of the existent lemmas about `Int.floor`, `Int.ceil` and `Int.fract` to the `ZSpan` namespace. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor merge-conflict
label:t-algebra$
 353/145 Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Topology/Algebra/Order/Floor.lean 3 8 ['github-actions', 'joelriou', 'mathlib-merge-conflicts', 'ster-oc'] joelriou
assignee:joelriou
52-76338
1 month ago
52-76338
52 days ago
30-23357
30 days
33791 PhoenixIra
author:PhoenixIra
 feat: Generalization of FixedPointApproximants to CompletePartialOrder --- This PR provides a generalization of FixedPointApproximants to CompletePartialOrder. Not every theorem can be generalized, as sometimes we require additional conditions (namely `x ≤ f x`) in order to guarantee that the set is directed and thus the supremum is well-defined. This is not necessary in a CompleteLattice. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-order merge-conflict 223/100 Mathlib/Order/CompletePartialOrder.lean,Mathlib/SetTheory/Ordinal/FixedPointApproximants.lean 2 21 ['PhoenixIra', 'github-actions', 'mathlib-merge-conflicts', 'vihdzp'] PhoenixIra and vihdzp
assignee:PhoenixIra assignee:vihdzp
48-26672
1 month ago
48-26672
48 days ago
38-12430
38 days
26942 pechersky
author:pechersky
 feat(RingTheory/Valuation/ValueGroupIso): isomorphism of value groups when compatible and also to the ValuativeRel's value group by request from comment in https://github.com/leanprover-community/mathlib4/pull/26754#issuecomment-3051770901 - [ ] depends on: #26588 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #26939 - [x] depends on: #26940 - [x] depends on: #26941 merge-conflict t-ring-theory t-order 299/3 Mathlib.lean,Mathlib/Algebra/GroupWithZero/Range.lean,Mathlib/Algebra/Order/GroupWithZero/Range.lean,Mathlib/Algebra/Order/GroupWithZero/WithZero.lean,Mathlib/Algebra/Order/Monoid/WithTop.lean,Mathlib/RingTheory/Valuation/ValueGroupIso.lean 6 10 ['faenuccio', 'github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'pechersky'] faenuccio
assignee:faenuccio
45-57253
1 month ago
245-42663
245 days ago
10-67838
10 days
14712 astrainfinita
author:astrainfinita
 perf: change instance priority and order about `OfNat` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict slow-typeclass-synthesis t-algebra
label:t-algebra$
 49/20 Mathlib/Algebra/Group/Nat.lean,Mathlib/Algebra/Group/ZeroOne.lean,Mathlib/Algebra/Homology/Embedding/Basic.lean,Mathlib/Algebra/Tropical/Basic.lean,Mathlib/Data/BitVec.lean,Mathlib/Data/Nat/Cast/Defs.lean,Mathlib/Data/Rat/Defs.lean,Mathlib/Data/UInt.lean,Mathlib/NumberTheory/ArithmeticFunction.lean 9 26 ['MichaelStollBayreuth', 'astrainfinita', 'eric-wieser', 'fpvandoorn', 'github-actions', 'j-loreaux', 'leanprover-bot', 'mathlib-bors'] nobody
41-56358
1 month ago
616-34528
616 days ago
20-15089
20 days
17627 hrmacbeth
author:hrmacbeth
 feat: universal properties of vector bundle constructions Characterizations for the smoothness of maps into the total spaces of (1) the direct sum of two vector bundles; (2) the pullback of a vector bundle. This gap in the library was exposed by #17358. --- - [x] depends on: #22804 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-differential-geometry 311/9 Mathlib/Data/Bundle.lean,Mathlib/Geometry/Manifold/VectorBundle/Basic.lean,Mathlib/Geometry/Manifold/VectorBundle/Pullback.lean,Mathlib/Topology/FiberBundle/Constructions.lean 4 26 ['PatrickMassot', 'fpvandoorn', 'github-actions', 'grunweg', 'hrmacbeth', 'j-loreaux', 'leanprover-community-bot-assistant', 'mathlib-bors', 'mathlib4-dependent-issues-bot', 'sgouezel'] grunweg
assignee:grunweg
41-56346
1 month ago
301-56085
301 days ago
91-69159
91 days
27534 PierreQuinton
author:PierreQuinton
 feat: a typeclass for `sSup`/`sInf` to be lawful Adds lawful infima and suprema type classes. A preorder with lawful suprema: whenever a set has a least upper bound, `sSup` returns a least upper bound for that set. A preorder with lawful infima: whenever a set has a greatest lower bound, `sInf` returns a greastest lower bound for that set. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-order 121/8 Mathlib.lean,Mathlib/Order/CompleteLattice/Defs.lean,Mathlib/Order/LawfulSupInf.lean 3 26 ['PierreQuinton', 'YaelDillies', 'github-actions', 'mathlib4-merge-conflict-bot', 'plp127', 'vihdzp'] nobody
33-41049
1 month ago
148-72124
148 days ago
114-38193
114 days
35042 JovanGerb
author:JovanGerb
 chore: remove `meta` form `import Mathlib.Tactic...` This PR cleans up some imports of the form `import Mathlib.Tactic...`, by either removing them entirely, or removing the `meta` keyword. It should never be necessary to `meta import` a file from `Mathlib.Tactic`, because the relevant definitions should already have been marked as `meta`. The motivation is to reduce the amount of files that are `meta` imported when writing e.g. `import Mathlib`, hence reducing the amount of stuff that needs to be loaded. There are more other `meta import`s that need to be removed, but this PR is a good start. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import merge-conflict 61/142 Mathlib/Algebra/BigOperators/Group/Finset/Defs.lean,Mathlib/Algebra/FreeMonoid/Basic.lean,Mathlib/Algebra/Group/Action/Hom.lean,Mathlib/Algebra/Order/Group/Unbundled/Abs.lean,Mathlib/CategoryTheory/Functor/Basic.lean,Mathlib/Data/List/ChainOfFn.lean,Mathlib/Dynamics/OmegaLimit.lean,Mathlib/GroupTheory/GroupAction/Defs.lean,Mathlib/GroupTheory/GroupAction/DomAct/Basic.lean,Mathlib/Tactic/Algebraize.lean,Mathlib/Tactic/ApplyFun.lean,Mathlib/Tactic/ArithMult.lean,Mathlib/Tactic/Bound.lean,Mathlib/Tactic/CategoryTheory/Bicategory/Datatypes.lean,Mathlib/Tactic/CategoryTheory/Bicategory/Normalize.lean,Mathlib/Tactic/CategoryTheory/Bicategory/PureCoherence.lean,Mathlib/Tactic/CategoryTheory/CheckCompositions.lean,Mathlib/Tactic/CategoryTheory/Coherence/Basic.lean,Mathlib/Tactic/CategoryTheory/Coherence/Normalize.lean,Mathlib/Tactic/CategoryTheory/Coherence/PureCoherence.lean,Mathlib/Tactic/CategoryTheory/Elementwise.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Datatypes.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Normalize.lean,Mathlib/Tactic/CategoryTheory/Monoidal/PureCoherence.lean,Mathlib/Tactic/CategoryTheory/ToApp.lean,Mathlib/Tactic/Choose.lean,Mathlib/Tactic/DeclarationNames.lean,Mathlib/Tactic/DefEqTransformations.lean,Mathlib/Tactic/DeriveCountable.lean,Mathlib/Tactic/DeriveFintype.lean,Mathlib/Tactic/DeriveTraversable.lean,Mathlib/Tactic/ENatToNat.lean,Mathlib/Tactic/Explode.lean,Mathlib/Tactic/Explode/Pretty.lean,Mathlib/Tactic/FinCases.lean,Mathlib/Tactic/FunProp.lean,Mathlib/Tactic/FunProp/Attr.lean,Mathlib/Tactic/FunProp/Core.lean,Mathlib/Tactic/FunProp/FunctionData.lean,Mathlib/Tactic/FunProp/Theorems.lean,Mathlib/Tactic/FunProp/Types.lean,Mathlib/Tactic/GCongr/Core.lean,Mathlib/Tactic/GRewrite/Elab.lean,Mathlib/Tactic/Group.lean,Mathlib/Tactic/IrreducibleDef.lean,Mathlib/Tactic/Lift.lean,Mathlib/Tactic/Linarith.lean,Mathlib/Tactic/Linarith/Lemmas.lean,Mathlib/Tactic/Linarith/Oracle/FourierMotzkin.lean,Mathlib/Tactic/Linarith/Oracle/SimplexAlgorithm.lean,Mathlib/Tactic/Linarith/Oracle/SimplexAlgorithm/Gauss.lean,Mathlib/Tactic/Linarith/Oracle/SimplexAlgorithm/SimplexAlgorithm.lean,Mathlib/Tactic/Linarith/Preprocessing.lean,Mathlib/Tactic/Linarith/Verification.lean,Mathlib/Tactic/LinearCombination/Lemmas.lean,Mathlib/Tactic/Linter/DeprecatedSyntaxLinter.lean,Mathlib/Tactic/Linter/DocPrime.lean,Mathlib/Tactic/Linter/DocString.lean,Mathlib/Tactic/Linter/EmptyLine.lean,Mathlib/Tactic/Linter/FlexibleLinter.lean,Mathlib/Tactic/Linter/GlobalAttributeIn.lean,Mathlib/Tactic/Linter/HashCommandLinter.lean,Mathlib/Tactic/Linter/Multigoal.lean,Mathlib/Tactic/Linter/OldObtain.lean,Mathlib/Tactic/Linter/Style.lean,Mathlib/Tactic/Linter/TextBased.lean,Mathlib/Tactic/Linter/TextBased/UnicodeLinter.lean,Mathlib/Tactic/Linter/UnusedTactic.lean,Mathlib/Tactic/Linter/UnusedTacticExtension.lean,Mathlib/Tactic/MinImports.lean,Mathlib/Tactic/MoveAdd.lean,Mathlib/Tactic/Nontriviality/Core.lean,Mathlib/Tactic/NormNum/DivMod.lean,Mathlib/Tactic/NormNum/Ineq.lean,Mathlib/Tactic/NormNum/Prime.lean,Mathlib/Tactic/Order.lean,Mathlib/Tactic/Order/CollectFacts.lean,Mathlib/Tactic/Order/Graph/Tarjan.lean,Mathlib/Tactic/PNatToNat.lean,Mathlib/Tactic/Peel.lean,Mathlib/Tactic/ProdAssoc.lean,Mathlib/Tactic/ProxyType.lean,Mathlib/Tactic/Push.lean,Mathlib/Tactic/Qify.lean,Mathlib/Tactic/RSuffices.lean,Mathlib/Tactic/Ring/Basic.lean,Mathlib/Tactic/Ring/Common.lean,Mathlib/Tactic/Ring/Compare.lean,Mathlib/Tactic/Ring/PNat.lean,Mathlib/Tactic/Simproc/Divisors.lean,Mathlib/Tactic/Simproc/FinsetInterval.lean,Mathlib/Tactic/Simps/Basic.lean,Mathlib/Tactic/Subsingleton.lean,Mathlib/Tactic/TacticAnalysis/Declarations.lean,Mathlib/Tactic/TautoSet.lean,Mathlib/Tactic/Translate/Core.lean,Mathlib/Tactic/Translate/TagUnfoldBoundary.lean,Mathlib/Tactic/Widget/Calc.lean,Mathlib/Tactic/Widget/CommDiag.lean,Mathlib/Tactic/Widget/CongrM.lean 107 9 ['JovanGerb', 'dupuisf', 'github-actions', 'leanprover-radar', 'mathlib-merge-conflicts'] robin-carlier
assignee:robin-carlier
31-69594
1 month ago
31-69595
31 days ago
26-74403
26 days
35213 kim-em
author:kim-em
 chore: use @[to_dual] in ConditionallyCompleteLattice This PR adds `@[to_dual]` annotations across all `ConditionallyCompleteLattice` files: `Defs`, `Basic`, `Indexed`, `Finset`, and `Group`. Auto-generates dual theorems and deletes hand-written versions. (Absorbs the former PR #35212.) [Diff relative to #35209](https://github.com/kim-em/mathlib4/compare/kim/to-dual-complete-lattice...kim/to-dual-ccl-extended) - [ ] depends on: #35209 - [ ] depends on: #35211 🤖 Prepared with Claude Code merge-conflict LLM-generated 189/485 Mathlib/Order/Bounds/Basic.lean,Mathlib/Order/CompleteLattice/Basic.lean,Mathlib/Order/CompleteLattice/Defs.lean,Mathlib/Order/ConditionallyCompleteLattice/Defs.lean 4 5 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
27-44784
27 days ago
63-17897
63 days ago
0-963
16 minutes
35210 kim-em
author:kim-em
 chore: use @[to_dual] in CompleteLattice extras and Set.Lattice This PR uses `@[to_dual]` to auto-generate dual theorems in `Order.CompleteLattice.Lemmas`, `Order.CompleteLattice.Finset`, and `Data.Set.Lattice`, deleting hand-written dual versions. [Diff relative to previous PR](https://github.com/kim-em/mathlib4/compare/kim/to-dual-complete-lattice...kim/to-dual-complete-lattice-extras) - [ ] depends on: #35209 🤖 Prepared with Claude Code merge-conflict LLM-generated 217/579 Mathlib/Data/Set/Lattice.lean,Mathlib/Order/Bounds/Basic.lean,Mathlib/Order/CompleteLattice/Basic.lean,Mathlib/Order/CompleteLattice/Defs.lean,Mathlib/Order/CompleteLattice/Finset.lean,Mathlib/Order/CompleteLattice/Lemmas.lean,Mathlib/Tactic/SetLike.lean 7 5 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
27-44781
27 days ago
63-18876
63 days ago
0-918
15 minutes
35215 kim-em
author:kim-em
 chore: use @[to_dual] in FixedPoints This PR adds `@[to_dual]` annotations to 14 theorems about `lfp` in `Order/FixedPoints.lean`, auto-generating their `gfp` duals and deleting the hand-written versions. Also registers `OrderHom.lfp` as the dual of `OrderHom.gfp` via `attribute [to_dual existing]`. Auto-generated duals include: `le_gfp`, `gfp_le_fixed`, `gfp_le`, `gfp_le_map`, `map_gfp`, `isFixedPt_gfp`, `map_le_gfp`, `isGreatest_gfp_le`, `isGreatest_gfp`, `gfp_induction`, `map_gfp_comp`, `gfp_gfp`, `map_inf_fixedPoints_le`, `map_sInf_subset_fixedPoints_le`. [Diff relative to #35208](https://github.com/kim-em/mathlib4/compare/kim/to-dual-bounds-basic...kim/to-dual-fixed-points) - [x] depends on: #35208 🤖 Prepared with Claude Code LLM-generated merge-conflict 249/548 Mathlib/Algebra/Module/Torsion/Basic.lean,Mathlib/Order/CompleteLattice/Basic.lean,Mathlib/Order/CompleteLattice/Defs.lean,Mathlib/Order/ConditionallyCompleteLattice/Defs.lean,Mathlib/Order/FixedPoints.lean,Mathlib/Order/GaloisConnection/Basic.lean,Mathlib/Order/Interval/Set/Disjoint.lean,Mathlib/Topology/Order.lean 8 11 ['JovanGerb', 'github-actions', 'kim-em', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vihdzp'] alexjbest
assignee:alexjbest
27-40021
27 days ago
27-40022
27 days ago
24-18556
24 days
32918 michelsol
author:michelsol
 feat: define `supEdist` and `supDist` Create a new file Topology.MetricSpace.SupDistance and define the supremal distance in (extended) metric spaces. The defined `supEdist` and `supDist` will have similar theory to the already existing `infEdist` and `infDist`. The motivation is to be able to define the radius of a minimal bounding sphere as the infimum of the supDist later. [zulip discussion here](https://leanprover.zulipchat.com/#narrow/channel/116395-maths/topic/Formalizing.20Jung's.20theorem.20and.20minimal.20bounding.20spheres) t-topology new-contributor merge-conflict 75/0 Mathlib.lean,Mathlib/Topology/MetricSpace/SupDistance.lean 2 5 ['github-actions', 'mathlib4-merge-conflict-bot', 'michelsol', 'urkud'] nobody
26-49416
26 days ago
101-27976
101 days ago
21-3598
21 days
36165 Parcly-Taxel
author:Parcly-Taxel
 chore: deprecate `Nat.strongRec(On)'` In favour of Batteries's `Nat.strongRec` for definitions and `Nat.strong_induction_on` for proofs. t-data merge-conflict 34/66 Mathlib/Analysis/Analytic/Inverse.lean,Mathlib/Data/Int/GCD.lean,Mathlib/Data/Nat/Factorization/Induction.lean,Mathlib/Data/Nat/Init.lean,Mathlib/Data/Set/Finite/Basic.lean,Mathlib/Data/ZMod/Basic.lean,Mathlib/GroupTheory/SpecificGroups/Cyclic.lean,Mathlib/Topology/EMetricSpace/Paracompact.lean 8 6 ['JovanGerb', 'MichaelStollBayreuth', 'Parcly-Taxel', 'Vierkantor', 'github-actions', 'mathlib-bors', 'mathlib-merge-conflicts'] Vierkantor
assignee:Vierkantor
21-36145
21 days ago
27-40012
27 days ago
15-54679
15 days
37073 kim-em
author:kim-em
 feat: add normalize_instance% using core's normalizeInstance This PR adds a new `normalize_instance%` term elaborator that delegates to Lean core's `normalizeInstance` (from https://github.com/leanprover/lean4/pull/12897), and replaces ~53 `fast_instance%` call sites where the replacement is safe. `normalize_instance%` is a thin wrapper (~15 lines) around `Lean.Meta.normalizeInstance`. Like `fast_instance%`, it reduces instances to constructor applications and reuses canonical sub-instances. Unlike `fast_instance%`, it works at `instances` transparency and delegates all normalization logic to core. The replaced sites cover: - Equiv/type-alias transfers (WithAbs, WithConv, WithVal, WithLp, TransferInstance) - Surjective constructors (Con, RingCon quotients, module congruences) - DFunLike leaf instances (MultilinearMap, ContinuousMultilinearMap, AlternatingMap, Intertwining) - Quotient instances (LinearAlgebra/Quotient/Defs) - inferInstanceAs% sites (StandardPart, Presentation/Core) - Miscellaneous (InfiniteAdeleRing, ZMod) This PR *doesn't* attempt to replace all `fast_instance%`; it gets more complicated! 🤖 Prepared with Claude Code merge-conflict 88/59 Mathlib/Algebra/Algebra/TransferInstance.lean,Mathlib/Algebra/Module/Congruence/Defs.lean,Mathlib/Algebra/Order/Ring/StandardPart.lean,Mathlib/Algebra/WithConv.lean,Mathlib/Analysis/Normed/Lp/WithLp.lean,Mathlib/Analysis/Normed/Ring/WithAbs.lean,Mathlib/Data/ZMod/Basic.lean,Mathlib/GroupTheory/Congruence/Defs.lean,Mathlib/LinearAlgebra/Alternating/Basic.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/Quotient/Defs.lean,Mathlib/NumberTheory/NumberField/InfiniteAdeleRing.lean,Mathlib/RepresentationTheory/Intertwining.lean,Mathlib/RingTheory/Extension/Presentation/Core.lean,Mathlib/Tactic/FastInstance.lean,Mathlib/Topology/Algebra/Module/Alternating/Basic.lean,Mathlib/Topology/Algebra/Module/Multilinear/Basic.lean,Mathlib/Topology/Algebra/Valued/WithVal.lean 18 7 ['JovanGerb', 'github-actions', 'kim-em', 'leanprover-radar', 'mathlib-merge-conflicts'] nobody
21-596
21 days ago
21-597
21 days ago
2-73508
2 days
31595 astrainfinita
author:astrainfinita
 chore: redefine `Ideal.IsPrime` Redefine `Ideal.IsPrime` to make it correct for non-commutative cases --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
 333/100 Mathlib/Algebra/Order/Ring/Ordering/Defs.lean,Mathlib/RingTheory/DedekindDomain/Ideal/Lemmas.lean,Mathlib/RingTheory/GradedAlgebra/Radical.lean,Mathlib/RingTheory/Ideal/AssociatedPrime/Basic.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/Ideal/Maximal.lean,Mathlib/RingTheory/Ideal/MinimalPrime/Noetherian.lean,Mathlib/RingTheory/Ideal/Oka.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/Ideal/Over.lean,Mathlib/RingTheory/Ideal/Pointwise.lean,Mathlib/RingTheory/Ideal/Prime.lean,Mathlib/RingTheory/Ideal/Prod.lean,Mathlib/RingTheory/Ideal/Quotient/Basic.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/IsPrimary.lean,Mathlib/RingTheory/Localization/AtPrime/Basic.lean,Mathlib/RingTheory/Localization/Ideal.lean,Mathlib/RingTheory/Polynomial/Basic.lean,Mathlib/RingTheory/PrincipalIdealDomain.lean,Mathlib/RingTheory/Spectrum/Prime/Topology.lean,Mathlib/RingTheory/Valuation/Basic.lean 22 33 ['alreadydone', 'artie2000', 'astrainfinita', 'erdOne', 'github-actions', 'leanprover-bot', 'leanprover-radar', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] kim-em
assignee:kim-em
18-82555
18 days ago
18-82556
18 days ago
59-67698
59 days
35415 joneugster
author:joneugster
 feat(Cache): enable partial cache in downstream projects Migrated to fork from: #21238. Add features to `cache` and cleanup code: * enable partial cache retrieval in downstream projects: `lake exe cache get MyProject.Basic` downloads only the relevant cache to build `MyProject/Basic.lean` --- ### Notes: - replaces: #21195 - should address: #8767 - should address: #20568 ### Completed: - [x] depends on: #21632 - [x] ~~depends on: #21663~~ - [x] depends on: #21666 - [x] depends on: #21701 - [x] depends on: #21703 - [x] depends on: #21704 - [x] depends on: #21705 - [x] depends on: #21707 - [x] depends on: #21711 - [x] depends on: #21750 - [x] depends on: #21815 - [x] depends on: #21816 - [x] depends on: #21817 - [x] depends on: #21818 - [x] depends on: #21822 - [x] depends on: #21830 - [x] depends on: #21848 - [x] depends on: #21834 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI t-meta merge-conflict 34/15 Cache/Hashing.lean,Cache/IO.lean,Cache/Main.lean 3 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
16-76220
16 days ago
16-76221
16 days ago
34-10038
34 days
37502 felixpernegger
author:felixpernegger
 refactor(Topology): rename ```LocPathConnected``` Rename ```LocPathConnected``` to ```LocallyPathConnected``` per discussion at https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Rename.20.60.60.60LocPathConnectedSpace.60.60.60.3F/with/582824006 Deprecations were partly added with Claude --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology merge-conflict 369/304 Mathlib.lean,Mathlib/Analysis/CStarAlgebra/Unitary/Connected.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Topology.lean,Mathlib/Geometry/Manifold/ChartedSpace.lean,Mathlib/Geometry/Manifold/Instances/Real.lean,Mathlib/Topology/Algebra/Module/LocallyConvex.lean,Mathlib/Topology/Compactness/DeltaGeneratedSpace.lean,Mathlib/Topology/Connected/LocPathConnected.lean,Mathlib/Topology/Connected/LocallyPathConnected.lean,Mathlib/Topology/Connected/PathComponentOne.lean,Mathlib/Topology/Homotopy/Lifting.lean,Mathlib/Topology/Homotopy/LocallyContractible.lean 12 8 ['SnirBroshi', 'felixpernegger', 'github-actions', 'mathlib-bors', 'mathlib-merge-conflicts'] j-loreaux
assignee:j-loreaux
14-50178
14 days ago
14-62566
14 days ago
0-66443
18 hours
11964 adamtopaz
author:adamtopaz
 feat: The functor of points of a scheme We construct the functor of points functor, and prove that it's full and faithful. --- - [x] depends on: #11947 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebraic-geometry t-category-theory 210/0 Mathlib.lean,Mathlib/AlgebraicGeometry/FunctorOfPoints.lean,Mathlib/AlgebraicGeometry/OpenImmersion.lean 3 4 ['github-actions', 'grunweg'] nobody
13-60789
13 days ago
734-44175
734 days ago
0-1223
20 minutes
35518 kim-em
author:kim-em
 chore: forbid prime (') in filenames, rename LinearCombination' This PR renames `Mathlib/Tactic/LinearCombination'.lean` to `LinearCombinationPrime.lean` (and the corresponding test file), and adds a lint check to `modulesOSForbidden` to prevent future files with prime/apostrophe characters in their names. The `'` character in filenames causes shell escaping issues in scripts (any `find ... -name '*.lean'` or similar pattern needs careful quoting to handle these files correctly). 🤖 Prepared with Claude Code file-removed t-meta LLM-generated merge-conflict 13/8 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/LinearCombinationPrime.lean,Mathlib/Tactic/Linter/TextBased.lean,Mathlib/Tactic/Linter/UnusedTactic.lean,MathlibTest/linear_combination_prime.lean 6 8 ['eric-wieser', 'euprunin', 'github-actions', 'kim-em', 'mathlib-merge-conflicts'] dwrensha
assignee:dwrensha
11-47206
11 days ago
11-47206
11 days ago
25-42954
25 days
33434 astrainfinita
author:astrainfinita
 chore: redefine `Finsupp.indicator` using `Finsupp.onFinset` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data merge-conflict 6/17 Mathlib/Data/Finsupp/Indicator.lean 1 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
7-27687
7 days ago
7-27688
7 days ago
5-59263
5 days
35802 xroblot
author:xroblot
 feat(RamificationInertia): splitting in the decomposition field --- - [x] depends on: #35798 - [ ] depends on: #35405 - [x] depends on: #35371 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory large-import merge-conflict 279/4 Mathlib/NumberTheory/RamificationInertia/Basic.lean,Mathlib/NumberTheory/RamificationInertia/HilbertTheory.lean,Mathlib/RingTheory/FiniteType.lean,Mathlib/RingTheory/Finiteness/Basic.lean 4 5 ['github-actions', 'joneugster', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
6-45503
6 days ago
49-66330
49 days ago
0-537
8 minutes
37437 mariainesdff
author:mariainesdff
 feat(Algebra/SkewPolynomial/Basic): add API We add API for `SkewPolynomial`, including `monomial`, `coeff`, `C` and `X`. Co-authored by: @xgenereux. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
 307/19 Mathlib/Algebra/SkewPolynomial/Basic.lean 1 2 ['github-actions', 'mathlib-merge-conflicts'] ocfnash
assignee:ocfnash
6-20292
6 days ago
6-20293
6 days ago
10-34092
10 days
37438 mariainesdff
author:mariainesdff
 feat(Algebra/SkewPolynomial/Basic): add more API We add API for `SkewPolynomial`, including the definitions `erase` and `update` and results about coefficients and supports. Co-authored by: @xgenereux. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
 602/22 Mathlib/Algebra/SkewPolynomial/Basic.lean 1 2 ['github-actions', 'mathlib-merge-conflicts'] ocfnash
assignee:ocfnash
6-20291
6 days ago
6-20292
6 days ago
10-33503
10 days
37037 mariainesdff
author:mariainesdff
 feat(RingTheory/PowerSeries/Substitution): add lemmas Co-authored by: @AntoineChambert-Loir. --- - [x] depends on: #36444 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory merge-conflict 50/0 Mathlib/RingTheory/PowerSeries/Substitution.lean 1 12 ['WenrongZou', 'github-actions', 'mariainesdff', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'robin-carlier'] chrisflav and robin-carlier
assignee:robin-carlier assignee:chrisflav
3-58252
3 days ago
8-21884
8 days ago
4-76454
4 days
35569 goliath-klein
author:goliath-klein
 refactor(PiTensorProduct/{InjectiveNorm, ProjectiveNorm}): deprecate `injectiveSeminorm` This PR: * Deprecates `PiTensorProduct.injectiveSeminorm` and supporting lemmas. * Moves the theory of `liftEquiv` from InjectiveSeminorm.lean to ProjectiveSeminorm.lean. No changes are introduced beyond adding deprecation notices, adapting docstrings, and moving material between files. The PR leaves InjectiveSeminorm.lean almost empty. A new implementation of `injectiveSeminorm`, one which reflects the common mathematical definition, is to be done. This is the third in a series of three PRs with the goal to [deprecate `PiTensorProuduct.injectiveSeminorm`](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/injectiveSeminorm/with/568798633). --- - [ ] depends on: #35567 - [ ] depends on: #35568 Deprecations: - injectiveSeminorm - dualSeminorms_bounded - injectiveSeminorm_apply - norm_eval_le_injectiveSeminorm - injectiveSeminorm_le_projectiveSeminorm - injectiveSeminorm_tprod_le Preliminary work toward a reimplementation is at #33969. I've added Davood and myself to the "Authors" field, as we have now significantly refactored this module. Co-authored-by: Davood H. T. Tehrani [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor merge-conflict 221/232 Mathlib/Analysis/Normed/Module/PiTensorProduct/InjectiveSeminorm.lean,Mathlib/Analysis/Normed/Module/PiTensorProduct/ProjectiveSeminorm.lean 2 6 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
3-21868
3 days ago
3-21869
3 days ago
16-54716
16 days
37793 YaelDillies
author:YaelDillies
 chore: camel-case `finset_sum` in lemma names and `finset_prod` too. Done with grep with the bogus replacements reverted by hand. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
 866/530 Mathlib/Algebra/Algebra/Operations.lean,Mathlib/Algebra/Algebra/Subalgebra/Operations.lean,Mathlib/Algebra/BigOperators/Associated.lean,Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/BigOperators/Finsupp/Basic.lean,Mathlib/Algebra/BigOperators/Group/Finset/Defs.lean,Mathlib/Algebra/BigOperators/Group/Finset/Lemmas.lean,Mathlib/Algebra/BigOperators/Pi.lean,Mathlib/Algebra/DirectSum/Basic.lean,Mathlib/Algebra/DirectSum/Idempotents.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/Group/EvenFunction.lean,Mathlib/Algebra/Group/ForwardDiff.lean,Mathlib/Algebra/Group/Pointwise/Set/BigOperators.lean,Mathlib/Algebra/Group/Subgroup/Finite.lean,Mathlib/Algebra/Group/Submonoid/BigOperators.lean,Mathlib/Algebra/Lie/Loop.lean,Mathlib/Algebra/LinearRecurrence.lean,Mathlib/Algebra/Module/LocalizedModule/Int.lean,Mathlib/Algebra/Module/Submodule/LinearMap.lean,Mathlib/Algebra/Module/Submodule/Pointwise.lean,Mathlib/Algebra/Module/Torsion/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Degree.lean,Mathlib/Algebra/MonoidAlgebra/MapDomain.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/MvPolynomial/Degrees.lean,Mathlib/Algebra/Order/Antidiag/Nat.lean,Mathlib/Algebra/Order/BigOperators/Group/Finset.lean,Mathlib/Algebra/Polynomial/BigOperators.lean,Mathlib/Algebra/Polynomial/Bivariate.lean,Mathlib/Algebra/Polynomial/Coeff.lean,Mathlib/Algebra/Polynomial/EraseLead.lean,Mathlib/Algebra/Polynomial/Eval/Defs.lean,Mathlib/Algebra/Polynomial/Eval/Degree.lean,Mathlib/Algebra/Polynomial/Expand.lean,Mathlib/Algebra/Polynomial/FieldDivision.lean,Mathlib/Algebra/Polynomial/HasseDeriv.lean,Mathlib/Algebra/Polynomial/Lifts.lean,Mathlib/Algebra/Polynomial/SumIteratedDerivative.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Proper.lean,Mathlib/AlgebraicGeometry/SpreadingOut.lean,Mathlib/Analysis/CStarAlgebra/ApproximateUnit.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/NonUnital.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Unital.lean,Mathlib/Analysis/Calculus/ContDiff/FaaDiBruno.lean,Mathlib/Analysis/Calculus/Deriv/Mul.lean,Mathlib/Analysis/Calculus/FDeriv/Analytic.lean,Mathlib/Analysis/Calculus/FDeriv/Mul.lean,Mathlib/Analysis/Calculus/LogDeriv.lean,Mathlib/Analysis/Calculus/Rademacher.lean,Mathlib/Analysis/Calculus/Taylor.lean,Mathlib/Analysis/Distribution/SchwartzSpace/Deriv.lean,Mathlib/Analysis/Fourier/AddCircle.lean,Mathlib/Analysis/Fourier/FourierTransformDeriv.lean,Mathlib/Analysis/LocallyConvex/WithSeminorms.lean,Mathlib/Analysis/MeanInequalities.lean,Mathlib/Analysis/MeanInequalitiesPow.lean,Mathlib/Analysis/Normed/Field/Approximation.lean,Mathlib/Analysis/Normed/Group/FunctionSeries.lean,Mathlib/Analysis/Normed/Group/Tannery.lean,Mathlib/Analysis/Normed/Group/Ultra.lean,Mathlib/Analysis/Normed/Lp/lpSpace.lean,Mathlib/Analysis/Normed/Module/FiniteDimension.lean,Mathlib/Analysis/Normed/Ring/InfiniteProd.lean,Mathlib/Analysis/Normed/Ring/InfiniteSum.lean,Mathlib/Analysis/Normed/Unbundled/FiniteExtension.lean,Mathlib/Analysis/SpecialFunctions/Log/Summable.lean,Mathlib/Analysis/SpecialFunctions/Pochhammer.lean,Mathlib/Analysis/SpecialFunctions/Pow/NNReal.lean,Mathlib/Analysis/SpecialFunctions/Pow/Real.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Chebyshev/ChebyshevGauss.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Chebyshev/RootsExtrema.lean,Mathlib/Analysis/SpecificLimits/Normed.lean,Mathlib/Combinatorics/Hindman.lean,Mathlib/Combinatorics/SimpleGraph/LapMatrix.lean,Mathlib/Computability/AkraBazzi/SumTransform.lean,Mathlib/Data/DFinsupp/BigOperators.lean,Mathlib/Data/ENNReal/BigOperators.lean,Mathlib/Data/Finsupp/Basic.lean,Mathlib/Data/Nat/Choose/Lucas.lean,Mathlib/Data/Nat/Factorization/Basic.lean,Mathlib/Data/Nat/Squarefree.lean,Mathlib/Data/ZMod/Units.lean,Mathlib/FieldTheory/ChevalleyWarning.lean,Mathlib/FieldTheory/IntermediateField/Basic.lean,Mathlib/FieldTheory/Minpoly/MinpolyDiv.lean,Mathlib/Geometry/Manifold/Algebra/Monoid.lean,Mathlib/GroupTheory/Congruence/BigOperators.lean,Mathlib/LinearAlgebra/ConvexSpace/AffineSpace.lean,Mathlib/LinearAlgebra/DFinsupp.lean,Mathlib/LinearAlgebra/Dimension/LinearMap.lean,Mathlib/LinearAlgebra/Finsupp/Pi.lean,Mathlib/LinearAlgebra/Lagrange.lean,Mathlib/LinearAlgebra/Matrix/Charpoly/Coeff.lean,Mathlib/LinearAlgebra/Matrix/Ideal.lean,Mathlib/LinearAlgebra/Matrix/Polynomial.lean,Mathlib/LinearAlgebra/TensorProduct/Vanishing.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/Basic.lean,Mathlib/MeasureTheory/Function/ConditionalLExpectation.lean 218 31 ['Vierkantor', 'YaelDillies', 'adomani', 'github-actions', 'mathlib-bors', 'mathlib-merge-conflicts', 'themathqueen'] nobody
1-30392
1 day ago
1-47347
1 day ago
6-60672
6 days
37527 bryanboehnke
author:bryanboehnke
 feat(LocalRing/Etale): Finite étale extensions of local rings are monogenic Formalization of Lemma 3.2 from https://arxiv.org/abs/2503.07846: Given a finite extension of local rings R -> S, if the extension is étale, then there exists β ∈ S such that R[β] = S. Furthermore, if f(z) ∈ R[z] is the minimal polynomial of β, then f′(β) is a unit in S. This file also includes some relevant intermediate results used in the formalization of the proof of Lemma 3.1 from the same paper. Co-authored-by: George Peykanu Co-authored-by: Bianca Viray Co-authored-by: Grant Yang --- - [ ] depends on: #36421 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory new-contributor large-import merge-conflict 209/0 Mathlib.lean,Mathlib/FieldTheory/Minpoly/Basic.lean,Mathlib/RingTheory/IsAdjoinRoot.lean,Mathlib/RingTheory/LocalRing/Etale.lean 4 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
1-23123
1 day ago
1-23124
1 day ago
0-8486
2 hours
37872 artie2000
author:artie2000
 feat: generalise degree bound for minimal polynomial * Generalise `minpoly.natDegree_le` and `minpoly.degree_le` from vector spaces to free modules * Add the necessary API, most notably strengthening Cayley-Hamilton --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
 115/39 Mathlib.lean,Mathlib/Algebra/Module/SpanRank.lean,Mathlib/Analysis/Complex/Polynomial/Basic.lean,Mathlib/FieldTheory/IntermediateField/Adjoin/Basic.lean,Mathlib/FieldTheory/Minpoly/Free.lean,Mathlib/FieldTheory/Minpoly/MinpolyDiv.lean,Mathlib/FieldTheory/Normal/Basic.lean,Mathlib/LinearAlgebra/Matrix/Charpoly/LinearMap.lean,Mathlib/RingTheory/Valuation/Minpoly.lean,docs/references.bib 10 12 ['artie2000', 'copilot-pull-request-reviewer', 'github-actions', 'mathlib-merge-conflicts', 'riccardobrasca'] riccardobrasca
assignee:riccardobrasca
1-23119
1 day ago
1-23120
1 day ago
4-73204
4 days
31513 FLDutchmann
author:FLDutchmann
 feat(Tactic): `polynomial` tactic Implement tactic for proving equality of polynomials. This tactic is part of a larger suite (see https://github.com/leanprover-community/mathlib4/pull/30374). - [ ] depends on: #31508 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta 1824/6 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Algebra/Basic.lean,Mathlib/Tactic/Algebra/Lemmas.lean,Mathlib/Tactic/Polynomial/Basic.lean,Mathlib/Tactic/Polynomial/Core.lean,Mathlib/Util/Qq.lean,MathlibTest/Algebra.lean,MathlibTest/Polynomial.lean,scripts/noshake.json 10 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot'] Vierkantor
assignee:Vierkantor
0-34792
9 hours ago
156-39986
156 days ago
0-1388
23 minutes
33662 Pjotr5
author:Pjotr5
 feat(Algebra/Order/BigOperators/Expect): add lemmas and strict variants ### Summary - Combine `le_expect_nonempty_of_subadditive` and `le_expect_of_subadditive` into a single lemma `le_expect_of_subadditive`. The extra assumptions `(hs : s.Nonempty)` and `(h_zero : m 0 = 0)` are unnecessary (since `m 0 = 0` follows from `h_div`). This requires a small downstream update to `Mathlib/Analysis/RCLike/Basic.lean` (`norm_expect_le`). - Add strict-inequality variants: `expect_lt_expect`, `expect_lt`, `lt_expect`. - Add existence lemmas: `exists_le_of_expect_le_expect`, `exists_le_of_le_expect`, `exists_le_of_expect_le`, and `exists_lt_of_expect_lt_expect`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra merge-conflict
label:t-algebra$
 46/16 Mathlib/Algebra/Order/BigOperators/Expect.lean,Mathlib/Analysis/RCLike/Basic.lean 2 9 ['Pjotr5', 'b-mehta', 'felixpernegger', 'github-actions', 'mathlib-merge-conflicts'] eric-wieser
assignee:eric-wieser
0-22357
6 hours ago
2-18049
2 days ago
98-49157
98 days
37067 kbuzzard
author:kbuzzard
 feat: add_group tactic Written by Claude Code, additivising the `group` tactic, although there were some problems which needed human input. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) This is me burning Claude credits as a result of this comment [#mathlib4 > MulAut and to_additive @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/MulAut.20and.20to_additive/near/581059625) . To my amusement, naively additivising the `group` tactic to make an `add_group` tactic does not work. The problem is that the algorithm run by `group` involves adding `← zpow_neg_one` to the simp set, which rewrites `x⁻¹` to `x ^ (-1)` for `x` in any group. Amusingly, when additivised, this becomes `-x -> -1 • x` which then immediately becomes `(-1 • 1) • x` which then becomes `((-1 • 1) • 1) • x` etc etc, as the integers are themselves an additive group. Instead, Claude found the following trick: drop `← neg_one_zsmul` and `neg_one_zsmul_add`, and use `neg_add_rev` and `neg_zero` to reduce `-(a+b)` and `-0`, use `zsmul_neg` to reduce `n • (-a)` to `(-n) • a` and then use things like `add_neg_cancel_right` and `neg_add_cancel_right` to do `-b + b` and `b + -b` together with some new `zsmul_neg_trick` lemmas to deal with `(n • b) + -b` etc. The idea is to ensure that any consecutive chains of `b`'s and `-b`'s and `z • b`'s will all get amalgamated, but we cannot change `-b` to `-1 • b` so have to try harder than in the multiplicative case. Here is a detailed (human-written!) explanation of the difference between `Tactic/AddGroup.lean` and the additivisation of `Tactic/Group.Lean`. 1) Note that the `zpow_trick` lemmas in `Tactic/Group.lean` are additivised, so we import `Group.lean` in `AddGroup.lean` to access these additivised lemmas. 2) `Mathlib.Algebra.Group.Commutator` has no additive version (and it's not clear that it should have one), so we don't use an additive version of `commutatorElement_def` (which expands `⁅g₁, g₂⁆` to `g₁ * g₂ * g₁⁻¹ * g₂⁻¹`). Note: that means that we cannot additivise a test. 3) Line 67 of the additive file uses `neg_add_rev, neg_zero, zsmul_neg, ← neg_zsmul,` as a workaround for the looping ` ← zpow_neg_one`. 4) `Int.mul_neg, Int.neg_mul` are dropped (they don't seem to be needed, all tests are passing, ring_nf is probably doing this.) 5) `sub_eq_add_neg` is added: people use subtraction in additive groups; division doesn't seem to be covered for multiplicative groups? So `add_group` can solve `a + b - b = a` but `group` cannot solve `a * b / b = a`. *** There is also one fewer test in the `add_group` tests, as I had to remove the commutator test. I don't know much at all about tactic-writing, the PR is all Claude code, but a lot of it is to_additive copypasta. The review of the code above is my own. t-meta LLM-generated merge-conflict 183/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/AddGroup.lean,MathlibTest/AddGroup.lean 4 4 ['github-actions', 'kbuzzard', 'mathlib-merge-conflicts'] nobody
0-8199
2 hours ago
0-8199
2 hours ago
24-4771
24 days
37501 xgenereux
author:xgenereux
 feat(DedekindDomain/AdicValuation): `intValuation` on uniformizers is `exp (-1)` This PR add the lemma `intValuation_val_uniformizer_eq` which is an application of #37497. Note that I've had to reorganize the files a little bit: 1. I wanted to import `Valuation.Discrete.Basic` in `AdicValuation` but this was not possible since there was a dependency in the other direction (`Valuation.Discrete.Basic` depended on `AdicValuation`). I don't think this makes sense - we want to have access to basic definitions on general valuation in an application file like `AdicValuation`. ~~The reorganization consist of moving the `IsDiscreteValuationRing` of `Valuation.Discrete.Basic` to `AdicValuation`.~~ The reorganization consist of moving the `IsDiscreteValuationRing` section to a new file. 2. I moved some lemmas out of `Mathlib.RingTheory.Valuation.Discrete.RankOne` to the parent file `Mathlib.RingTheory.Valuation.Discrete.Basic.`. These lemmas do not need the richer imports from `RankOne` and are needed in my application. Co-authored-by: María Inés de Frutos Fernández <[mariaines.dff@gmail.com](mailto:mariaines.dff@gmail.com)> --- - [ ] depends on: #37497 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory merge-conflict 204/167 Mathlib.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Reduction.lean,Mathlib/NumberTheory/NumberField/Completion/FinitePlace.lean,Mathlib/RingTheory/DedekindDomain/AdicValuation.lean,Mathlib/RingTheory/OrderOfVanishing/Noetherian.lean,Mathlib/RingTheory/Valuation/Discrete/Basic.lean,Mathlib/RingTheory/Valuation/Discrete/IsDiscreteValuationRing.lean,Mathlib/RingTheory/Valuation/Discrete/RankOne.lean 8 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
0-8196
2 hours ago
0-8197
2 hours ago
7-78257
7 days
37523 matthewjasper
author:matthewjasper
 feat: elements of Dedekind domain approximate elements of valuation ring Algebra part of showing that `R` is dense in `O_v` which is used to show that `R / v` is isomorphic to the residue field of `O_v` and construct the base change isomorphism for finite adeles. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory merge-conflict 81/1 Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/RingTheory/DedekindDomain/AdicValuation.lean 2 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
0-8195
2 hours ago
0-8196
2 hours ago
15-13144
15 days
37864 JovanGerb
author:JovanGerb
 chore: reorder arguments of `AddMonoidHom.map_zsmul` This PR modifies `AddMonoidHom.map_nsmul`, `AddMonoidHom.map_zsmul` and `AddMonoidHom.map_zsmul'` so that their order of arguments is as expected. This is then consistent with `map_nsmul`/`map_zsmul`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
 23/24 Mathlib/Algebra/Category/Grp/ZModuleEquivalence.lean,Mathlib/Algebra/Group/Hom/Defs.lean,Mathlib/Algebra/GroupWithZero/Action/Defs.lean,Mathlib/Algebra/Module/CharacterModule.lean,Mathlib/Algebra/Module/Equiv/Basic.lean,Mathlib/Analysis/Complex/Circle.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Angle.lean,Mathlib/CategoryTheory/Linear/Basic.lean,Mathlib/CategoryTheory/Linear/LinearFunctor.lean,Mathlib/CategoryTheory/Preadditive/FunctorCategory.lean 10 5 ['JovanGerb', 'github-actions', 'mathlib-merge-conflicts', 'themathqueen'] nobody
0-8192
2 hours ago
0-8193
2 hours ago
5-11297
5 days
38061 joelriou
author:joelriou
 feat(AlgebraicTopology/SimplicialSet/AnodyneExtensions): the opposite of a pairing --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology maintainer-merge merge-conflict 159/0 Mathlib.lean,Mathlib/AlgebraicTopology/SimplexCategory/Rev.lean,Mathlib/AlgebraicTopology/SimplicialSet/AnodyneExtensions/IsUniquelyCodimOneFace.lean,Mathlib/AlgebraicTopology/SimplicialSet/AnodyneExtensions/Op.lean,Mathlib/AlgebraicTopology/SimplicialSet/Degenerate.lean,Mathlib/AlgebraicTopology/SimplicialSet/NonDegenerateSimplices.lean,Mathlib/AlgebraicTopology/SimplicialSet/NonDegenerateSimplicesSubcomplex.lean,Mathlib/AlgebraicTopology/SimplicialSet/Simplices.lean,Mathlib/AlgebraicTopology/SimplicialSet/SubcomplexOp.lean 9 4 ['dagurtomas', 'github-actions', 'mathlib-merge-conflicts'] robin-carlier
assignee:robin-carlier
0-8190
2 hours ago
0-8190
2 hours ago
1-55413
1 day
6777 adomani
author:adomani
 chore(Co*variantClass): replace eta-expanded (· * ·), (· + ·), (· ≤ ·), (· < ·) Replace `CovariantClass X X (· * ·) (· ≤ ·)` with -> `CovariantClass X X HMul.hMul LE.le` and similarly for `HAdd`, `LT`, `Contravariant`. This PR is inspired by [Issue #6646](https://github.com/leanprover-community/mathlib4/issues/6646) and, more specifically, [this comment](https://github.com/leanprover-community/mathlib4/issues/6646#issuecomment-1692792066). Note that https://github.com/leanprover/lean4/pull/2267 would make this unnecessary --- ```bash # First sed command: # the first captured pattern is `Co*variantClass ` # the second captured pattern is `` # the third captured pattern is `+` or `*` # the fourth captured pattern is `<` or `≤` # a match for `Co*variantClass (· ·) (· ·)` becomes # `Co*variantClass replaceop replaceop` # Second sed command: similar to the first, but looks for `(Function.swap (· ·))` sed -i ' s=\(Co[ntra]*variantClass \(..*\) \2 \)(· *\([+*]\) *·) (· *\([<≤]\) *·)=\1replaceop\3 replaceop\4=g s=\(Co[ntra]*variantClass \(..*\) \2 \)(\([Functio\.swap ]*\)(· *\([+*]\) *·)) (· *\([<≤]\) *·)=\1(\3replaceop\4) replaceop\5=g s=replaceop+=HAdd.hAdd=g s=replaceop\*=HMul.hMul=g s=replaceop<=LT.lt=g s=replaceop≤=LE.le=g s=\(Co[ntra]*variantClass N N\) (· \* ·) r=\1 HMul.hMul r=g s=\(Co[ntra]*variantClass N N (swap μ)\) (· ≤ ·)=\1 LE.le=g s=\(Co[ntra]*variantClass N N\) (swap (· \* ·)) r=\1 (swap HMul.hMul) r=g s=\(CovariantClass (Filter α) (Filter α)\) (· / ·) (· ≤ ·)=\1 HDiv.hDiv LE.le=g s=\(CovariantClass (Filter α) (Filter α)\) (swap (· / ·)) (· ≤ ·)=\1 (swap HDiv.hDiv) LE.le=g s=\(Co[ntra]*variantClass .* (fun x y .> . \* .)\) (· ≤ ·)=\1 LE.le=g s=\(Co[ntra]*variantClass .* (fun x y .> . \* .)\) (· < ·)=\1 LT.lt=g s=\(Co[ntra]*variantClass [^}]*\) (· ≤ ·)=\1 LE.le=g s=\(CovariantClass .* (Filter β)\) (· • ·) LE.le=\1 HSMul.hSMul LE.le=g ' $(git ls-files '*.lean') ``` [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 703/678 Counterexamples/ZeroDivisorsInAddMonoidAlgebras.lean,Mathlib/Algebra/BigOperators/Basic.lean,Mathlib/Algebra/Bounds.lean,Mathlib/Algebra/CovariantAndContravariant.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/Group/UniqueProds.lean,Mathlib/Algebra/GroupPower/Order.lean,Mathlib/Algebra/MonoidAlgebra/Degree.lean,Mathlib/Algebra/Order/Archimedean.lean,Mathlib/Algebra/Order/Group/Abs.lean,Mathlib/Algebra/Order/Group/Defs.lean,Mathlib/Algebra/Order/Group/DenselyOrdered.lean,Mathlib/Algebra/Order/Group/MinMax.lean,Mathlib/Algebra/Order/Group/OrderIso.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Order/Interval.lean,Mathlib/Algebra/Order/Kleene.lean,Mathlib/Algebra/Order/LatticeGroup.lean,Mathlib/Algebra/Order/Module.lean,Mathlib/Algebra/Order/Monoid/Basic.lean,Mathlib/Algebra/Order/Monoid/Cancel/Defs.lean,Mathlib/Algebra/Order/Monoid/Canonical/Defs.lean,Mathlib/Algebra/Order/Monoid/Defs.lean,Mathlib/Algebra/Order/Monoid/Lemmas.lean,Mathlib/Algebra/Order/Monoid/MinMax.lean,Mathlib/Algebra/Order/Monoid/NatCast.lean,Mathlib/Algebra/Order/Monoid/OrderDual.lean,Mathlib/Algebra/Order/Monoid/Prod.lean,Mathlib/Algebra/Order/Monoid/WithTop.lean,Mathlib/Algebra/Order/Monoid/WithZero/Basic.lean,Mathlib/Algebra/Order/Monoid/WithZero/Defs.lean,Mathlib/Algebra/Order/Nonneg/Ring.lean,Mathlib/Algebra/Order/Pointwise.lean,Mathlib/Algebra/Order/Positive/Ring.lean,Mathlib/Algebra/Order/Ring/Canonical.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Order/Ring/Lemmas.lean,Mathlib/Algebra/Order/Sub/Basic.lean,Mathlib/Algebra/Order/Sub/Canonical.lean,Mathlib/Algebra/Order/Sub/Defs.lean,Mathlib/Algebra/Order/WithZero.lean,Mathlib/Algebra/Parity.lean,Mathlib/Algebra/Star/Order.lean,Mathlib/Algebra/Tropical/Basic.lean,Mathlib/Analysis/Normed/Order/Lattice.lean,Mathlib/Data/DFinsupp/Lex.lean,Mathlib/Data/DFinsupp/Order.lean,Mathlib/Data/Finset/Fold.lean,Mathlib/Data/Finsupp/Lex.lean,Mathlib/Data/Finsupp/Order.lean,Mathlib/Data/List/BigOperators/Basic.lean,Mathlib/Data/List/BigOperators/Lemmas.lean,Mathlib/Data/Multiset/Basic.lean,Mathlib/Data/Nat/Cast/Order.lean,Mathlib/Data/PNat/Basic.lean,Mathlib/Data/Real/ENNReal.lean,Mathlib/Data/Real/NNReal.lean,Mathlib/Data/Set/Semiring.lean,Mathlib/Data/Sign.lean,Mathlib/MeasureTheory/Function/LpOrder.lean,Mathlib/MeasureTheory/Function/SimpleFuncDenseLp.lean,Mathlib/MeasureTheory/Measure/MeasureSpace.lean,Mathlib/MeasureTheory/Measure/VectorMeasure.lean,Mathlib/Order/ConditionallyCompleteLattice/Group.lean,Mathlib/Order/Filter/Basic.lean,Mathlib/Order/Filter/Pointwise.lean,Mathlib/Probability/Martingale/Basic.lean,Mathlib/Probability/Process/Stopping.lean,Mathlib/RingTheory/GradedAlgebra/Basic.lean,Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/Game/Basic.lean,Mathlib/SetTheory/Game/PGame.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/Basic.lean,Mathlib/SetTheory/Ordinal/NaturalOps.lean,Mathlib/Tactic/GCongr/Core.lean,Mathlib/Tactic/Positivity/Basic.lean,Mathlib/Topology/ContinuousFunction/Algebra.lean,lean-toolchain,test/Recall.lean,test/propose.lean 81 37 ['adomani', 'alreadydone', 'digama0', 'eric-wieser', 'ericrbg', 'jcommelin', 'leanprover-bot', 'sgouezel', 'vihdzp'] nobody
0-323
5 minutes ago
899-36483
899 days ago
35-63136
35 days

Stale new contributor PRs

Number Author Title Description Labels +/- Modified files (first 100) 📝 💬 All users who commented or reviewed Assignee(s) Updated Last status change total time in review
14563 awueth
author:awueth
 feat: if-then-else of exclusive or statement --- If `¬(P ∧ Q)` then `ite (P ∨ Q) a 1 = (ite P a 1) * (ite Q a 1)` [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-algebra new-contributor
label:t-algebra$
 5/0 Mathlib/Algebra/Group/Basic.lean 1 3 ['eric-wieser', 'github-actions', 'kim-em'] nobody
609-63378
1 year ago
640-23960
640 days ago
6-38745
6 days
12751 Command-Master
author:Command-Master
 feat: add lemmas for Nat/Bits, Nat/Bitwise and Nat/Size Remove `@[simp]` from `Nat.bit_false` and `Nat.bit_true`, as `bit0` and `bit1` are deprecated, and add some lemmas to `Bits`, `Bitwise` and `Size`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data new-contributor 66/7 Mathlib/Data/Nat/Bits.lean,Mathlib/Data/Nat/Bitwise.lean,Mathlib/Data/Nat/Multiplicity.lean,Mathlib/Data/Nat/Size.lean 4 26 ['Command-Master', 'Rida-Hamadani', 'Ruben-VandeVelde', 'YaelDillies', 'github-actions', 'jcommelin'] nobody
605-48287
1 year ago
640-54509
640 days ago
56-40668
56 days
15121 Eloitor
author:Eloitor
 feat: iff theorems for IsSplitEpi and IsSplitMono in opposite category --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-category-theory new-contributor 40/0 Mathlib/CategoryTheory/EpiMono.lean 1 3 ['github-actions', 'joelriou', 'mattrobball'] nobody
592-23122
1 year ago
623-68781
623 days ago
7-3203
7 days
14242 js2357
author:js2357
 feat: Prove equivalence of `isDedekindDomain` and `isDedekindDomainDvr` Prove that `isDedekindDomainDvr` is equivalent to both `isDedekindDomain` and `isDedekindDomainInv`. Specifically, prove `isDedekindDomainDvr A → isDedekindDomainInv A`, because `isDedekindDomain A → isDedekindDomainDvr A` and `IsDedekindDomain A ↔ IsDedekindDomainInv A` are already in Mathlib. - [x] depends on: #14099 - [x] depends on: #14216 - [ ] depends on: #14237 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra blocked-by-other-PR new-contributor
label:t-algebra$
 269/1 Mathlib.lean,Mathlib/RingTheory/DedekindDomain/Dvr.lean,Mathlib/RingTheory/FractionalIdeal/LocalizedAtPrime.lean,Mathlib/RingTheory/Localization/Basic.lean 4 2 ['github-actions', 'leanprover-community-mathlib4-bot'] nobody
569-34181
1 year ago
657-23128
657 days ago
0-273
4 minutes
16887 metinersin
author:metinersin
 feat(ModelTheory/Complexity): define conjunctive and disjunctive formulas Defines `FirstOrder.Language.BoundedFormula.IsConjunctive` and `FirstOrder.Language.BoundedFormula.IsDisjunctive`. --- - [ ] depends on: #16885 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR new-contributor t-logic 300/7 Mathlib/ModelTheory/Complexity.lean,Mathlib/ModelTheory/Equivalence.lean,Mathlib/ModelTheory/Syntax.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
561-30159
1 year ago
576-58233
576 days ago
0-1299
21 minutes
16888 metinersin
author:metinersin
 feat(ModelTheory/Complexity): Define conjunctive and disjunctive normal forms Define `FirstOrder.Language.BoundedFormula.IsDNF` and `FirstOrder.Language.BoundedFormula.IsCNF`. --- - [ ] depends on: #16887 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR new-contributor t-logic 415/7 Mathlib/ModelTheory/Complexity.lean,Mathlib/ModelTheory/Equivalence.lean,Mathlib/ModelTheory/Syntax.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
561-30159
1 year ago
576-58234
576 days ago
0-1045
17 minutes
16889 metinersin
author:metinersin
 feat(ModelTheory/Complexity): Normal forms Defines `FirstOrder.Language.BoundedFormula.toDNF` and `FirstOrder.Language.BoundedFormula.toCNF` - given a quantifier-free formula, these construct a semantically equivalent formula in disjunctive normal form and conjunctive normal form, respectively. --- - [ ] depends on: #16888 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR new-contributor t-logic 525/7 Mathlib/ModelTheory/Complexity.lean,Mathlib/ModelTheory/Equivalence.lean,Mathlib/ModelTheory/Syntax.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
561-30158
1 year ago
576-53984
576 days ago
0-613
10 minutes
14619 Command-Master
author:Command-Master
 chore: Merge `Trunc` to `Squash` Remove `Trunc` and use `Squash` instead --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP new-contributor 197/211 Mathlib/CategoryTheory/EpiMono.lean,Mathlib/CategoryTheory/Preadditive/Biproducts.lean,Mathlib/Data/DFinsupp/Basic.lean,Mathlib/Data/Fintype/Basic.lean,Mathlib/Data/Fintype/Card.lean,Mathlib/Data/Fintype/Option.lean,Mathlib/Data/Fintype/Perm.lean,Mathlib/Data/Fintype/Quotient.lean,Mathlib/Data/Quot.lean,Mathlib/Data/Semiquot.lean,Mathlib/GroupTheory/Perm/Cycle/Factors.lean,Mathlib/GroupTheory/Perm/Sign.lean,Mathlib/Logic/Equiv/List.lean 13 3 ['Command-Master', 'github-actions', 'vihdzp'] nobody
551-76709
1 year ago
unknown
0-0
0 seconds
12750 Command-Master
author:Command-Master
 feat: define Gray code --- Define binary reflected gray code, both as a permutation of `Nat` and as a permutation of `BitVec n`, and prove some theorems about them. Additionally, remove `@[simp]` from `Nat.bit_false` and `Nat.bit_true`, as `bit0` and `bit1` are deprecated, and add some lemmas to `Bits`, `Bitwise` and `Size`. - [ ] depends on: #12751 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-data new-contributor merge-conflict awaiting-author 226/0 Mathlib.lean,Mathlib/Data/Nat/Bits.lean,Mathlib/Data/Nat/Bitwise.lean,Mathlib/Data/Nat/GrayCode.lean,Mathlib/Data/Nat/Size.lean 5 5 ['Rida-Hamadani', 'alreadydone', 'github-actions', 'grunweg', 'leanprover-community-mathlib4-bot'] nobody
543-52816
1 year ago
692-34914
692 days ago
16-49744
16 days
14598 Command-Master
author:Command-Master
 chore: add typeclasses to unify various `add_top`, `add_eq_top`, etc. Add the four typeclasses `IsTopAbsorbing`, `IsBotAbsorbing`, `NoTopSum`, `NoBotSum`, as additive equivalents for `MulZeroClass` and `NoZeroDivisors`. Add instances of these for `ENNReal`, `WithTop α`, `WithBot α`, `PUnit`, `EReal`, `PartENat`, `Measure`, `Interval` and `Filter`. Also split `Algebra/Order/AddGroupWithTop` to `Algebra/Order/Group/WithTop` and `Algebra/Order/Monoid/WithTop` --- Previous usages of lemmas with quantified names like `WithTop.add_top` have to be changed to just `add_top`. `add_lt_top` is `@[simp]`, in accordance with `ENNReal.add_lt_top` being `@[simp]`. This affects `WithTop.add_lt_top` which previously hadn't been `@[simp]`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra t-order new-contributor
label:t-algebra$
 264/195 Archive/Wiedijk100Theorems/BallotProblem.lean,Mathlib.lean,Mathlib/Algebra/Order/Group/WithTop.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/Interval/Basic.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Basic.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Defs.lean,Mathlib/Algebra/Order/Monoid/Unbundled/WithTop.lean,Mathlib/Algebra/Order/Monoid/WithTop.lean,Mathlib/Algebra/PUnitInstances/Order.lean,Mathlib/Algebra/Polynomial/Degree/Definitions.lean,Mathlib/Algebra/Polynomial/Monic.lean,Mathlib/Algebra/Tropical/Basic.lean,Mathlib/Analysis/Analytic/Meromorphic.lean,Mathlib/Analysis/Normed/Lp/ProdLp.lean,Mathlib/Analysis/NormedSpace/ENorm.lean,Mathlib/Analysis/SpecialFunctions/JapaneseBracket.lean,Mathlib/Analysis/SpecialFunctions/Log/ENNRealLog.lean,Mathlib/Data/ENNReal/Operations.lean,Mathlib/Data/ENat/Basic.lean,Mathlib/Data/Nat/PartENat.lean,Mathlib/Data/Nat/WithBot.lean,Mathlib/Data/Real/EReal.lean,Mathlib/LinearAlgebra/Lagrange.lean,Mathlib/MeasureTheory/Covering/Differentiation.lean,Mathlib/MeasureTheory/Decomposition/Lebesgue.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/CondexpL1.lean,Mathlib/MeasureTheory/Function/Jacobian.lean,Mathlib/MeasureTheory/Function/L1Space.lean,Mathlib/MeasureTheory/Function/L2Space.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Function/LpSeminorm/TriangleInequality.lean,Mathlib/MeasureTheory/Function/LpSpace.lean,Mathlib/MeasureTheory/Function/StronglyMeasurable/Basic.lean,Mathlib/MeasureTheory/Function/UniformIntegrable.lean,Mathlib/MeasureTheory/Integral/Bochner.lean,Mathlib/MeasureTheory/Integral/MeanInequalities.lean,Mathlib/MeasureTheory/Integral/SetIntegral.lean,Mathlib/MeasureTheory/Integral/VitaliCaratheodory.lean,Mathlib/MeasureTheory/Measure/Hausdorff.lean,Mathlib/MeasureTheory/Measure/Lebesgue/Basic.lean,Mathlib/MeasureTheory/Measure/LevyProkhorovMetric.lean,Mathlib/MeasureTheory/Measure/MeasureSpace.lean,Mathlib/MeasureTheory/Measure/MeasureSpaceDef.lean,Mathlib/MeasureTheory/Measure/Regular.lean,Mathlib/MeasureTheory/Measure/Typeclasses.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/Order/Filter/Pointwise.lean,Mathlib/Probability/Kernel/Defs.lean,Mathlib/Probability/Martingale/Convergence.lean,Mathlib/RingTheory/Multiplicity.lean,Mathlib/RingTheory/MvPowerSeries/NoZeroDivisors.lean,Mathlib/RingTheory/UniqueFactorizationDomain.lean,Mathlib/Topology/EMetricSpace/Defs.lean,Mathlib/Topology/MetricSpace/Bounded.lean,Mathlib/Topology/MetricSpace/HausdorffDistance.lean,Mathlib/Topology/MetricSpace/Lipschitz.lean 57 30 ['Command-Master', 'YaelDillies', 'github-actions'] nobody
526-81092
1 year ago
526-81092
526 days ago
7-45599
7 days
16885 metinersin
author:metinersin
 feat(ModelTheory/Complexity): define literals Defines `FirstOrder.Language.BoundedFormula.IsLiteral` and `FirstOrder.Language.BoundedFormula.simpleNot` - an auxiliary operation that takes the negation of a formula and does some simplification. --- - [x] depends on: #16800 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author new-contributor t-logic 148/5 Mathlib/ModelTheory/Complexity.lean,Mathlib/ModelTheory/Equivalence.lean,Mathlib/ModelTheory/Semantics.lean,Mathlib/ModelTheory/Syntax.lean 4 20 ['YaelDillies', 'awainverse', 'github-actions', 'mathlib4-dependent-issues-bot', 'metinersin'] nobody
524-37213
1 year ago
560-26525
560 days ago
0-19926
5 hours
13248 hcWang942
author:hcWang942
 feat: basic concepts of auction theory ## Description Formalise some core concepts and results in auction theory: this includes definitions for first-price and second-price auctions, as well as several fundamental results and helping lemmas. This is the very first PR of the project formalizing core concepts and results in auction theory. Our group is working on more contributions on the formalization of game theory prefix. Co-authored-by: Ma Jiajun ## Reference Roughgarden, Tim. ***Twenty Lectures on Algorithmic Game Theory***. Cambridge University Press, 2020. [Link](https://www.cambridge.org/core/books/twenty-lectures-on-algorithmic-game-theory/A9D9427C8F43E7DAEF8C702755B6D72B) --- - [x] Will depend on #14163 once that PR is merged. The Fintype lemmas introduced by this PR have been added in that PR and will be removed from here once that PR gets merged ## Current plan for formalization of Game Theory The current plan for the formalizing of Game Theory include: #### 1. Auction Theory. 🎉 _(200+ lines, this PR)_ - Essential definitions of Sealed-bid auction, First-price auction and Second-price auction. - First-price auction has no dominant strategy. - Second-price auction has dominant strategy. (Second-price auction is DSIC) #### 2. Mechanism design & Myerson's Lemma. 🎉 (400+ lines, pending for modification to Mathlib Standard) - Mechanism design An allocation rule is implementable if there exists - Dominant Strategy Incentive Compatible (DSIC) payment rule - An allocation rule is monotone if for every bidder’s gain is nondecreasing w.r.t. her/his bid - Myerson's Lemma Implementable ⇔ Monotone In the above case, the DSIC payment rule is unique. #### 3. von Neumann‘s Minimax Theorem. 🎉 (800+ lines, pending for modification to Mathlib Standard) - Equilibrium in zero sum game - Formalization strategy: via Loomis’s theorem. #### 4. Nash Equilibrium. 🎉 (pending for modification to Mathlib Standard) #### 5. Brouwer fixed-point theorem. (Work in Progress) #### 6. More Mechanism design. (Planning) merge-conflict awaiting-author new-contributor t-logic 204/0 Mathlib.lean,Mathlib/GameTheory/Auction/Basic.lean,docs/references.bib 3 148 ['Shreyas4991', 'YaelDillies', 'eric-wieser', 'faenuccio', 'github-actions', 'grunweg', 'hcWang942', 'tb65536', 'urkud', 'vihdzp'] hcWang942
assignee:hcWang942
519-76045
1 year ago
533-62233
533 days ago
109-82807
109 days
19125 yhtq
author:yhtq
 feat: add theorems to transfer `IsGalois` between pairs of fraction rings feat: add theorems to transfer `IsGalois` between pairs of fraction rings. - [x] depends on: #18404 - [x] depends on: #19124 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra new-contributor
label:t-algebra$
 121/0 Mathlib.lean,Mathlib/FieldTheory/Galois/IsFractionRing.lean,Mathlib/RingTheory/Localization/FractionRing.lean 3 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'tb65536'] nobody
490-12062
1 year ago
516-59844
516 days ago
0-1980
33 minutes
17739 Aaron1011
author:Aaron1011
 feat(Topology/Order/DenselyOrdered): prove Not (IsOpen) for intervals Prove that Iic/Ici/Ioc/Ico/Icc intervals are not open in densely ordered topologies with no min/max element --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-topology new-contributor 27/0 Mathlib/Topology/Order/DenselyOrdered.lean 1 8 ['github-actions', 'vihdzp'] nobody
456-34074
1 year ago
549-25644
549 days ago
0-4704
1 hour
15711 znssong
author:znssong
 feat(Combinatorics/SimpleGraph): Some lemmas about walk, cycle and Hamiltonian cycle --- These lemmas are separated from the `meow-sister/BondyChvatal` branch and will be needed for the proof of the Bondy-Chvátal theorem. - [x] depends on: #15536 - [x] depends on: #16294 merge-conflict awaiting-author t-combinatorics new-contributor 407/3 Mathlib/Combinatorics/SimpleGraph/Finite.lean,Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean,Mathlib/Combinatorics/SimpleGraph/Path.lean,Mathlib/Combinatorics/SimpleGraph/Walk.lean 4 22 ['Rida-Hamadani', 'YaelDillies', 'github-actions', 'mathlib4-dependent-issues-bot', 'znssong'] nobody
455-53160
1 year ago
576-64321
576 days ago
9-13962
9 days
18629 tomaz1502
author:tomaz1502
 feat(Computability.Timed): Formalization of runtime complexity of List.merge This PR adds the formalization of the runtime complexity of the merge function, defined in `Data/List/Sort`. Requires: https://github.com/leanprover-community/mathlib4/pull/15450 References: - Previous PR on mathlib3: https://github.com/leanprover-community/mathlib3/pull/14494/ - First discussion on Zulip: https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/BSc.20Final.20Project/near/220647062 - Second disussion on Zulip: https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/Formalization.20of.20Runtime.20Complexity.20of.20Sorting.20Algorithms/near/284184450 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability awaiting-author new-contributor 186/0 Mathlib.lean,Mathlib/Computability/Timed/InsertionSort.lean,Mathlib/Computability/Timed/Merge.lean 3 2 ['github-actions', 'trivial1711'] nobody
455-19079
1 year ago
495-18692
495 days ago
33-8818
33 days
18461 hannahfechtner
author:hannahfechtner
 feat: left and right common multiples mixins add mixins for left and right common multiples. These carry the data of what factors are used to create the common multiples --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-algebra new-contributor
label:t-algebra$
 78/0 Mathlib/Algebra/Group/Defs.lean 1 13 ['github-actions', 'hannahfechtner', 'jcommelin', 'kbuzzard', 'kim-em', 'trivial1711'] nobody
451-66659
1 year ago
451-66659
451 days ago
69-24210
69 days
19291 PieterCuijpers
author:PieterCuijpers
 feat(Algebra/Order/Hom): add quantale homomorphism Definition of quantale homomorphisms as functions that are both semigroup homomorphisms and complete lattice homomorphisms. --- - [x] depends on: #19810 - [x] depends on: #19811 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra new-contributor
label:t-algebra$
 209/0 Mathlib.lean,Mathlib/Algebra/Order/Hom/Quantale.lean,scripts/noshake.json 3 29 ['PieterCuijpers', 'YaelDillies', 'github-actions', 'kim-em', 'mathlib4-dependent-issues-bot'] nobody
450-40738
1 year ago
456-8139
456 days ago
27-52347
27 days
20372 jvlmdr
author:jvlmdr
 feat(MeasureTheory/Function): Add ContinuousLinearMap.bilinearCompLp(L) Introduce ContinuousLinearMap.bilinearCompLp and bilinearCompLpL. Generalize eLpNorm_le_eLpNorm_mul_eLpNorm theorems to include constant C in bound condition. --- Expect this may be useful for defining tempered distributions from functions in `L^p`. The definitions more or less follow `ContinuousLinearMap.compLp...`. Names are loosely analogous to `ContinuousLinearMap.bilinearComp` and `SchwartzMap.bilinLeftCLM`. Note: I preferred the spelling `hpqr : p⁻¹ + q⁻¹ = r⁻¹` with `f` in `L^p` and `g` in `L^q` to `hpqr : 1 / p = 1 / q + 1 / r`. It's easier to obtain from `ENNReal.IsConjExponent` too. A few questions: - [ ] I defined `bilinear{Left,Right}LpL` in addition to `bilinearCompLpL` because `LinearMap.mkContinuous₂` is marked as `noncomputable` and `LinearMap.mkContinuous` is not. Is this worth the extra definitions? (Note: This is not visible in the source due to `noncomputable section`.) - [ ] Should I use `C : ℝ` instead of `C : NNReal` for `eLpNorm_le_eLpNorm_mul_eLpNorm'_of_norm'`? - [ ] Is it going to be painful to have `[Fact (1 ≤ p)] [Fact (1 ≤ q)] [Fact (1 ≤ r)]`? I don't think there's a way to avoid it though. Maybe providing specialized versions for `p.IsConjExponent q` with `L^1`? Naming: - [ ] Is it satisfactory to add a `'` to the `eLpNorm_le_eLpNorm_mul_eLpNorm ` definitions in `CompareExp.lean` where `≤ ‖f x‖ * ‖g x‖` has been replaced with `≤ C * ‖f x‖ * ‖g x‖`? These could replace the existing theorems, although I don't want to break backwards compatibility. There are 5 instances: `eLpNorm_le_eLpNorm_top_mul_eLpNorm'`, `eLpNorm_le_eLpNorm_mul_eLpNorm_top'`, `eLpNorm'_le_eLpNorm'_mul_eLpNorm''`, `eLpNorm_le_eLpNorm_mul_eLpNorm_of_nnnorm'`, `eLpNorm_le_eLpNorm_mul_eLpNorm'_of_norm'` (I'm not sure why the existing theorem `eLpNorm_le_eLpNorm_mul_eLpNorm'_of_norm` has an internal `'`) - [ ] Is `bilinearLeftLpL` a suitable name? Other options: `bilinearCompLpLeftL`, `bilinearCompLeftLpL`, `bilinLeftLpL` (analogous to `SchwartzMap.bilinLeftCLM`) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-measure-probability new-contributor 203/40 Mathlib/MeasureTheory/Function/LpSeminorm/CompareExp.lean,Mathlib/MeasureTheory/Function/LpSpace.lean 2 1 ['github-actions'] nobody
443-58086
1 year ago
443-58086
443 days ago
27-43617
27 days
20248 peabrainiac
author:peabrainiac
 feat(Topology/Compactness): first-countable locally path-connected spaces are delta-generated Shows that all first-countable locally path-connected spaces are delta-generated (so in particular all normed spaces and convex subsets thereof are), and that delta-generated spaces are equivalently generated by the unit interval or standard simplices. --- - [ ] depends on: #21616 In principle, this should be close to all that's required to show that all simplicial complexes and CW-complexes are delta-generated; I just haven't done it yet because I'm not sure which file to best do it in. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR large-import new-contributor merge-conflict awaiting-author t-topology 1189/813 Mathlib.lean,Mathlib/Geometry/Manifold/ChartedSpace.lean,Mathlib/Topology/Algebra/Module/LocallyConvex.lean,Mathlib/Topology/Compactness/DeltaGeneratedSpace.lean,Mathlib/Topology/Connected/LocPathConnected.lean,Mathlib/Topology/Connected/PathConnected.lean,Mathlib/Topology/ContinuousOn.lean,Mathlib/Topology/Homotopy/HSpaces.lean,Mathlib/Topology/Path.lean 9 22 ['YaelDillies', 'github-actions', 'kbuzzard', 'mathlib4-dependent-issues-bot', 'peabrainiac'] nobody
431-15396
1 year ago
437-66313
437 days ago
39-21495
39 days
19943 AlexLoitzl
author:AlexLoitzl
 feat(Computability): Add Chomsky Normal Form Grammar and translation - Define Chomsky normal form grammars - Add language-preserving translation between context-free grammars and Chomsky normal form grammars Co-authored-by: Martin Dvorak martin.dvorak@matfyz.cz --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability awaiting-author new-contributor 3151/0 Mathlib.lean,Mathlib/Computability/ChomskyNormalForm/Basic.lean,Mathlib/Computability/ChomskyNormalForm/EmptyElimination.lean,Mathlib/Computability/ChomskyNormalForm/LengthRestriction.lean,Mathlib/Computability/ChomskyNormalForm/TerminalRestriction.lean,Mathlib/Computability/ChomskyNormalForm/Translation.lean,Mathlib/Computability/ChomskyNormalForm/UnitElimination.lean,Mathlib/Computability/ContextFreeGrammar.lean 8 59 ['AlexLoitzl', 'YaelDillies', 'github-actions', 'kim-em', 'madvorak'] nobody
426-49495
1 year ago
433-61117
433 days ago
37-29014
37 days
21501 sksgurdldi
author:sksgurdldi
 feat(List): add sum_zipWith_eq_finset_sum ### **Description:** This PR adds the lemma `List.sum_zipWith_eq_finset_sum` to `Mathlib.Algebra.BigOperators.Group.Finset.Basic`. #### **Statement:** The sum of the `zipWith` operation on two lists equals the sum of applying the operation to corresponding elements of the two lists, indexed over the minimum of their lengths. #### **Formal Statement:** ```lean lemma sum_zipWith_eq_finset_sum [Inhabited α] [Inhabited β] [AddCommMonoid γ] {op : α → β → γ} (l : List α) (m : List β) : (List.zipWith op l m).sum = ∑ x ∈ (Finset.range (Nat.min l.length m.length)), op (l[x]!) (m[x]!) ``` #### **Remarks:** - This lemma provides a useful equivalence between `List.zipWith` and summation over a `Finset.range` indexed by `Nat.min l.length m.length`. - It can be helpful in algebraic manipulations involving list-based summations. #### **Dependencies:** No additional dependencies. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-algebra new-contributor
label:t-algebra$
 43/0 Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean 1 1 ['github-actions', 'j-loreaux'] nobody
421-18266
1 year ago
421-18266
421 days ago
13-33168
13 days
21959 BGuillemet
author:BGuillemet
 feat(Topology/ContinuousMap): Stone-Weierstrass theorem for MvPolynomial Add the subalgebra of multivariate polynomials and prove it separates points, on the same model as `ContinuousMap/Polynomial.lean`. Prove the Stone-Weierstrass theorem and some variations for multivariate polynomials. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology new-contributor 285/1 Mathlib.lean,Mathlib/Topology/ContinuousMap/MvPolynomial.lean,Mathlib/Topology/ContinuousMap/StoneWeierstrass.lean 3 1 ['github-actions'] nobody
407-44107
1 year ago
407-44107
407 days ago
16-76141
16 days
15578 znssong
author:znssong
 feat(Function): Fixed points of function `f` with `f(x) >= x` We added some lemmas of fixed points of function `f` with `f(x) >= x`, where `f : α → α` is a function on a finite type `α`. This will be needed in proof of Bondy-Chvátal theorem. --- See also branch `meow-sister/BondyChvatal`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-analysis new-contributor 82/0 Mathlib.lean,Mathlib/Dynamics/FixedPoints/Basic.lean,Mathlib/Dynamics/FixedPoints/Increasing.lean 3 32 ['Ruben-VandeVelde', 'YaelDillies', 'github-actions', 'urkud', 'vihdzp', 'znssong'] nobody
399-39933
1 year ago
582-43162
582 days ago
29-48368
29 days
21018 markimunro
author:markimunro
 feat(Data/Matrix): add file with key definitions and theorems about elementary row operations Prove that each elementary row operation is equivalent to a multiplication by an elementary matrix, has another row operation which inverts it, and that each elementary matrix has a left inverse. This is a very large PR and I understand it will take time. This is my first one and will likely have issues but I will be ready to answer questions/fix them as soon as possible. Co-authored-by: Christopher Lynch --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data enhancement new-contributor merge-conflict awaiting-author 1230/0 Mathlib.lean,Mathlib/Data/Matrix/ElementaryRowOperations.lean,Mathlib/Data/Matrix/GaussianElimination.lean,Mathlib/Data/Matrix/GaussianEliminationOld,Mathlib/Data/Matrix/oldnames,et --hard 18533caba32,lean-toolchain 7 17 ['chrisflav', 'eric-wieser', 'github-actions', 'j-loreaux', 'markimunro'] nobody
380-75332
1 year ago
406-17888
406 days ago
23-22681
23 days
15212 victorliu5296
author:victorliu5296
 feat: Add fundamental theorem of calculus-2 for Banach spaces add the Mean Value Theorem for Banach spaces to the library and include reference for the theorem statement This theorem states that if `f : X → Y` is differentiable along the line segment from `a` to `b`, then the change in `f` equals the integral of its derivative along this path. This extends the mean value theorem to Banach spaces. This can be used for the eventual proof of the Newton-Kantorovich theorem with 1 constant contained inside the added reference. Here is the discussion on Zulipchat: https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Contributing.20FTC-2.20for.20Banach.20spaces t-measure-probability new-contributor merge-conflict awaiting-author t-analysis 60/1 Mathlib/MeasureTheory/Integral/FundThmCalculus.lean 1 3 ['github-actions', 'hrmacbeth', 'victorliu5296'] nobody
375-70321
1 year ago
569-47692
569 days ago
51-85104
51 days
22308 plp127
author:plp127
 feat (Analysis/Convex): Generalize `Convex` lemmas to `StarConvex` This PR generalizes many lemmas assuming `Convex 𝕜 s` to assume `StarConvex 𝕜 0 s`. --- - [x] depends on: #22421 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-analysis new-contributor 30/18 Mathlib/Analysis/Convex/Gauge.lean,Mathlib/Analysis/Convex/GaugeRescale.lean,Mathlib/Analysis/Convex/Star.lean,Mathlib/Analysis/LocallyConvex/AbsConvexOpen.lean 4 5 ['Paul-Lez', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
372-56241
1 year ago
unknown
0-0
0 seconds
21488 imbrem
author:imbrem
 feat(CategoryTheory/Monoidal): premonoidal categories Add support for premonoidal categories --- Still want to add support for: - Premonoidal braided/symmetric categories - The monoidal coherence theorem, which I've already ported in my `discretion` library - The `coherence` tactic, which should work fine for premonoidal categories too but wanted to get this in front of reviewers ASAP to make sure my general approach was alright [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory new-contributor 900/361 Mathlib/Algebra/Category/ModuleCat/Presheaf/Monoidal.lean,Mathlib/CategoryTheory/Bicategory/End.lean,Mathlib/CategoryTheory/GradedObject/Monoidal.lean,Mathlib/CategoryTheory/Localization/Monoidal.lean,Mathlib/CategoryTheory/Monoidal/Braided/Basic.lean,Mathlib/CategoryTheory/Monoidal/Category.lean,Mathlib/CategoryTheory/Monoidal/Center.lean,Mathlib/CategoryTheory/Monoidal/CoherenceLemmas.lean,Mathlib/CategoryTheory/Monoidal/Discrete.lean,Mathlib/CategoryTheory/Monoidal/End.lean,Mathlib/CategoryTheory/Monoidal/Free/Basic.lean,Mathlib/CategoryTheory/Monoidal/Functor.lean,Mathlib/CategoryTheory/Monoidal/FunctorCategory.lean,Mathlib/CategoryTheory/Monoidal/Mon_.lean,Mathlib/CategoryTheory/Monoidal/Opposite.lean,Mathlib/CategoryTheory/Monoidal/Transport.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Datatypes.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Normalize.lean,Mathlib/Tactic/CategoryTheory/Monoidal/PureCoherence.lean,Mathlib/Tactic/CategoryTheory/MonoidalComp.lean,MathlibTest/StringDiagram.lean 21 9 ['YaelDillies', 'github-actions', 'grunweg', 'imbrem', 'kim-em', 'leanprover-community-bot-assistant'] nobody
372-52509
1 year ago
372-52510
372 days ago
57-47357
57 days
20873 vbeffara
author:vbeffara
 feat(Topology/Covering): path lifting and homotopy lifting This proves the existence and uniqueness of path and homotopy lifts through covering maps. --- I tried to separate as much of the proof as possible into separate PRs (which are already in Mathlib now), but the proof here relies on a monolithic construction of an explicit lift along a well-chosen subdivision, in `partial_lift`, with associated definitions. Only one standalone lean file added. An older WIP PR #10084 by Junyan Xu @alreadydone proves similar results using a very similar construction for path lifting, with a different argument to obtain continuity for homotopy lifting. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-topology new-contributor 281/1 Mathlib.lean,Mathlib/Topology/Covering/Basic.lean,Mathlib/Topology/Covering/Lift.lean 3 9 ['alreadydone', 'github-actions', 'grunweg', 'vbeffara'] nobody
371-55237
1 year ago
446-47437
446 days ago
5-6208
5 days
20313 thefundamentaltheor3m
author:thefundamentaltheor3m
 feat(Data/Complex/Exponential): prove some useful results about the complex exponential. This PR proves two basic results about the complex exponential: * `abs_exp_mul_I (x : ℂ) : abs (Complex.exp (I * x)) = Real.exp (-x.im)` * `one_sub_rexp_re_le_abs_one_sub_cexp (x : ℂ) : 1 - Real.exp x.re ≤ Complex.abs (1 - Complex.exp x)` Both results were proved as part of the sphere packing project. There's a chance they're too specific for mathlib, but I thought they were worth PRing anyway. Would it also be a good idea to tag `abs_exp_mul_I` with `simp`? Feedback/suggestions welcome. Note: `one_sub_rexp_re_le_abs_one_sub_cexp` was proved by Bhavik Mehta @b-mehta --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-analysis new-contributor 167/141 Mathlib.lean,Mathlib/Analysis/Complex/Basic.lean,Mathlib/Analysis/SpecialFunctions/Log/ERealExp.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Chebyshev.lean,Mathlib/Data/Complex/Exponential/Defs.lean,Mathlib/Data/Complex/Exponential/Lemmas.lean,Mathlib/Data/Complex/ExponentialBounds.lean,Mathlib/Tactic/FunProp.lean,MathlibTest/Recall.lean,MathlibTest/positivity.lean 10 12 ['b-mehta', 'github-actions', 'kim-em', 'thefundamentaltheor3m', 'trivial1711'] nobody
364-26435
11 months ago
447-36903
447 days ago
8-45680
8 days
20730 kuotsanhsu
author:kuotsanhsu
 feat(LinearAlgebra/Matrix/SchurTriangulation): prove Schur decomposition/triangulation `Matrix.schur_triangulation` shows that a matrix over an algebraically closed field is unitarily similar to an upper triangular matrix --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra new-contributor
label:t-algebra$
 317/2 Mathlib.lean,Mathlib/LinearAlgebra/Matrix/Block.lean,Mathlib/LinearAlgebra/Matrix/SchurTriangulation.lean,Mathlib/Logic/Equiv/Basic.lean 4 14 ['eric-wieser', 'github-actions', 'kim-em', 'kuotsanhsu'] nobody
364-22567
11 months ago
444-13540
444 days ago
13-56244
13 days
22809 b-reinke
author:b-reinke
 feat: Category algebras and path algebras This PR defines the category algebra of a linear category and path algebras of quivers. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra t-category-theory new-contributor
label:t-algebra$
 218/0 Mathlib/Algebra/Ring/Assoc.lean,Mathlib/CategoryTheory/Linear/CategoryAlgebra.lean,Mathlib/Combinatorics/Quiver/PathAlgebra.lean,Mathlib/Data/DFinsupp/BigOperators.lean 4 2 ['b-reinke', 'github-actions'] nobody
348-73406
11 months ago
unknown
0-0
0 seconds
15654 TpmKranz
author:TpmKranz
 feat(Computability): language-preserving maps between NFA and RE Map REs to NFAs via Thompson's construction and NFAs to REs using GNFAs Last chunk of #12648 --- - [ ] depends on: #15651 - [ ] depends on: #15649 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR new-contributor t-computability merge-conflict awaiting-zulip 985/2 Mathlib.lean,Mathlib/Computability/GNFA.lean,Mathlib/Computability/Language.lean,Mathlib/Computability/NFA.lean,Mathlib/Computability/RegularExpressions.lean,Mathlib/Data/FinEnum/Option.lean,docs/references.bib 7 3 ['github-actions', 'leanprover-community-mathlib4-bot', 'meithecatte'] nobody
346-19685
11 months ago
615-42870
615 days ago
0-179
2 minutes
24008 meithecatte
author:meithecatte
 chore(EpsilonNFA): replace manual lemmas with @[simps] --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability awaiting-author new-contributor 2/24 Mathlib/Computability/EpsilonNFA.lean 1 2 ['YaelDillies', 'github-actions', 'urkud'] nobody
340-65264
11 months ago
340-65264
340 days ago
27-52316
27 days
23349 BGuillemet
author:BGuillemet
 feat: add LocallyLipschitzOn.lipschitzOnWith_of_isCompact and two small lemmas about Lipschitz functions Main feat (in Mathlib/Topology/EMetricSpace/Basic.lean): if a function `f` from an extended pseudometric space to a pseudometric space is locally Lipschitz on a compact subset `s`, then `f` is Lipschitz on `s`. The theorem is true only when the codomain of `f` is a pseudometric space, so it needs imports from Mathlib/Topology/MetricSpace. Other small feat (in Mathlib/Analysis/Calculus/ContDiff/RCLike.lean): a function that is continuously differentiable on an open subset is locally Lipschitz on this subset. --- - [ ] depends on: #22890 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology large-import new-contributor 59/4 Mathlib/Analysis/Calculus/ContDiff/RCLike.lean,Mathlib/Topology/EMetricSpace/Lipschitz.lean 2 4 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] PatrickMassot
assignee:PatrickMassot
324-37605
10 months ago
324-37607
324 days ago
35-30364
35 days
12799 jstoobysmith
author:jstoobysmith
 feat(LinearAlgebra/UnitaryGroup): Add properties of Special Unitary Group Add properties of the special unitary group, mirroring the properties of found in Algebra/Star/Unitary.lean. In particular, I add an instance of `specialUnitaryGroup` as a `Group`, `Star`, `InvolutiveStar`, and `StarMul`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt t-algebra new-contributor merge-conflict awaiting-author
label:t-algebra$
 78/0 Mathlib/LinearAlgebra/UnitaryGroup.lean 1 8 ['chrisflav', 'jcommelin', 'leanprover-community-bot-assistant'] nobody
314-9558
10 months ago
697-37211
697 days ago
9-22045
9 days
20334 miguelmarco
author:miguelmarco
 feat: allow polyrith to use a local Singular/Sage install Try to call a local install of Singular (either standalone or inside Sage) to find the witness for polyrith before trying to call the online sage cell server. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author new-contributor t-meta 171/48 Mathlib/Tactic/Polyrith.lean,scripts/polyrith_sage.py 2 16 ['eric-wieser', 'github-actions', 'hanwenzhu', 'kim-em', 'miguelmarco', 'mkoeppe'] nobody
307-2111
10 months ago
445-40092
445 days ago
27-62333
27 days
25218 kckennylau
author:kckennylau
 feat(AlgebraicGeometry): Tate normal form of elliptic curves --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebraic-geometry awaiting-zulip new-contributor 291/26 Mathlib.lean,Mathlib/AlgebraicGeometry/EllipticCurve/IsomOfJ.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Modular/TateNormalForm.lean,Mathlib/AlgebraicGeometry/EllipticCurve/NormalForms.lean,Mathlib/AlgebraicGeometry/EllipticCurve/VariableChange.lean 5 31 ['MichaelStollBayreuth', 'Multramate', 'acmepjz', 'github-actions', 'grunweg', 'kckennylau', 'leanprover-community-bot-assistant'] nobody
285-85272
9 months ago
318-60389
318 days ago
6-44784
6 days
10190 jstoobysmith
author:jstoobysmith
 feat(AlgebraicTopology): add Augmented Simplex Category - Added the definition of the category FinLinOrd of finite linear ordered sets. - Added the definition of the augmented simplex category `AugmentedSimplexCategory`, and showed it is the Skeleton of FinLinOrd. - Showed that the category of augmented simplicial objects defined as a comma category is equivalent to the category of functors from `AugmentedSimplexCategory^\op` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology WIP t-category-theory new-contributor merge-conflict 720/0 Mathlib.lean,Mathlib/AlgebraicTopology/AugmentedSimplexCategory.lean,Mathlib/AlgebraicTopology/SimplicialObject.lean,Mathlib/Order/Category/FinLinOrd.lean 4 5 ['TwoFX', 'YaelDillies', 'joelriou', 'jstoobysmith'] nobody
259-57412
8 months ago
796-50338
796 days ago
7-63253
7 days
25238 Hagb
author:Hagb
 feat(Tactic/ComputeDegree): add support for scalar multiplication with different types It would be able to deal with `a • (X : R[X])` where `a : S` is in a different type `S` with `[SMulZeroClass S R]`. --- - [x] depends on: #25237 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta new-contributor 17/5 Mathlib/Tactic/ComputeDegree.lean,MathlibTest/ComputeDegree.lean 2 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
255-63603
8 months ago
285-85272
285 days ago
38-26044
38 days
18646 jxjwan
author:jxjwan
 feat(RingTheory): isotypic components --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-ring-theory new-contributor 308/0 Mathlib/Order/CompactlyGenerated/Basic.lean,Mathlib/RingTheory/Isotypic.lean,Mathlib/RingTheory/SimpleModule.lean 3 1 ['github-actions'] nobody
254-65624
8 months ago
527-74193
527 days ago
0-1609
26 minutes
20671 thefundamentaltheor3m
author:thefundamentaltheor3m
 feat(Analysis/Asymptotics/SpecificAsymptotics): Proving that 𝛔ₖ(n) = O(nᵏ⁺¹) This PR proves a result about the $\sigma_k(n)$ arithmetic function, namely, that it is $O\left(n^{k+1}\right)$. Main theorem: `theorem sigma_asymptotic (k : ℕ) : (fun n ↦ (σ k n : ℝ)) =O[atTop] (fun n ↦ (n ^ (k + 1) : ℝ))` This result was proved as part of the sphere packing project. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory new-contributor large-import merge-conflict awaiting-author 29/0 Mathlib/Analysis/Asymptotics/SpecificAsymptotics.lean 1 3 ['b-mehta', 'github-actions', 'mathlib4-merge-conflict-bot'] b-mehta
assignee:b-mehta
249-69165
8 months ago
450-43980
450 days ago
9-59130
9 days
22925 ggranberry
author:ggranberry
 feat(Mathlib/PlaceHolder/ToeplitzHausdorff): Toeplitz-Hausdorff --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP new-contributor will-close-soon awaiting-author help-wanted t-analysis 411/0 Mathlib/PlaceHolder/ToeplitzHausdorff.lean,Mathlib/PlaceHolder/ToeplitzHausdorff_v2.lean 2 11 ['faenuccio', 'ggranberry', 'github-actions'] faenuccio
assignee:faenuccio
246-61035
8 months ago
394-45917
394 days ago
0-1302
21 minutes
20722 ctchou
author:ctchou
 feat(Counterexamples): the Vitali set is non-measurable --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt t-measure-probability new-contributor merge-conflict awaiting-author 258/3 Counterexamples.lean,Counterexamples/VitaliSetNotMeasurable.lean,Mathlib/MeasureTheory/Measure/NullMeasurable.lean,docs/1000.yaml 4 76 ['ctchou', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot', 'vihdzp'] vihdzp
assignee:vihdzp
243-58849
8 months ago
457-50819
457 days ago
0-47663
13 hours
28502 gilesgshaw
author:gilesgshaw
 feat(Logic/Basic): avoid unnecessary uses of choice Certain proofs are modified to remove a dependence on the axoim of choice --- - [ ] depends on: #28623 blocked-by-other-PR new-contributor merge-conflict awaiting-author t-logic 83/74 Mathlib/Logic/Basic.lean 1 7 ['Ruben-VandeVelde', 'eric-wieser', 'gilesgshaw', 'github-actions', 'kim-em', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
240-80661
7 months ago
243-66190
243 days ago
0-35689
9 hours
19582 yu-yama
author:yu-yama
 feat(GroupExtension/Abelian): define `OfMulDistribMulAction.equivH2` Mainly defines: - `structure GroupExtension.OfMulDistribMulAction N G [MulDistribMulAction G N]`: group extensions of `G` by `N` where the multiplicative action of `G` on `N` is the conjugation - `structure GroupExtension.OfMulDistribMulActionWithSection N G [MulDistribMulAction G N]`: group extensions with specific choices of sections - `def GroupExtension.OfMulDistribMulAction.equivH2`: a bijection between the equivalence classes of group extensions and $H^2 (G, N)$ --- - [x] depends on: #20802 (split PR: contains changes to the `Defs` file) - [x] depends on: #20998 (split PR: mainly adds the `Basic` file) - [ ] depends on: #26670 (split PR: adds the first part of the `Abelian` file) Here is a relevant TODO in Mathlib: https://github.com/leanprover-community/mathlib4/blob/4e9fa40d7c480937e09cd6e47a591bd6f3b8be42/Mathlib/RepresentationTheory/GroupCohomology/LowDegree.lean#L46-L48 I would appreciate your comments. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra blocked-by-other-PR new-contributor
label:t-algebra$
 750/14 Mathlib.lean,Mathlib/GroupTheory/GroupExtension/Abelian.lean,Mathlib/GroupTheory/GroupExtension/Defs.lean,docs/references.bib 4 5 ['YaelDillies', 'erdOne', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
238-30769
7 months ago
461-1328
461 days ago
43-22586
43 days
28095 Equilibris
author:Equilibris
 Univ generic corec Draft PR: Adding variable universe corecursor for PFunctor --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict new-contributor 321/70 Mathlib/Data/PFunctor/Multivariate/Basic.lean,Mathlib/Data/PFunctor/Multivariate/M.lean,Mathlib/Data/TypeVec.lean 3 7 ['Equilibris', 'alexkeizer', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
237-16031
7 months ago
unknown
0-0
0 seconds
28150 Equilibris
author:Equilibris
 chore: clean up proofs typevec proofs While adding variable universe corecs I found a lot of theorems in typevec that could do with a bit of a clean-up --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data new-contributor 24/26 Mathlib/Data/TypeVec.lean 1 7 ['Equilibris', 'alexkeizer', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
237-16030
7 months ago
237-16031
237 days ago
13-49738
13 days
27403 MoritzBeroRoos
author:MoritzBeroRoos
 fix: replace probably erroneous usage of ⬝ (with old \cdot) by · (with \centerdot) Discussion at [zulip](https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/.5Ccdot.20!.3D.20.5Ccenterdot). Currently the abbreviations \cdot and \centerdot resolve to different, with the naked eye nearly undistinguishable symbols (despite the c in cdot surely standing for center..). This pr replaces instances of ⬝ where · was probably meant. All of the replacement is in comments, except for the file bench_summary.lean which is used for priting the github benchmark results. Since this file is about scientific notation of numbers, sure · was meant to be used, not a rectangle. [Related](https://github.com/leanprover-community/mathlib4/pull/27399) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict new-contributor 195/195 Mathlib/Algebra/ContinuedFractions/Computation/Approximations.lean,Mathlib/Algebra/DirectSum/Idempotents.lean,Mathlib/Algebra/Lie/Derivation/Basic.lean,Mathlib/Algebra/Module/Equiv/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/DivisionPolynomial/Basic.lean,Mathlib/Analysis/Analytic/Constructions.lean,Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Bounds.lean,Mathlib/Analysis/Calculus/FDeriv/Symmetric.lean,Mathlib/Analysis/Fourier/FourierTransformDeriv.lean,Mathlib/Analysis/InnerProductSpace/Dual.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Analysis/Normed/Unbundled/InvariantExtension.lean,Mathlib/Analysis/SpecialFunctions/Complex/CircleAddChar.lean,Mathlib/Combinatorics/Configuration.lean,Mathlib/Combinatorics/SimpleGraph/AdjMatrix.lean,Mathlib/Combinatorics/SimpleGraph/LapMatrix.lean,Mathlib/Data/Matrix/Block.lean,Mathlib/Data/Matrix/ConjTranspose.lean,Mathlib/Data/Matrix/Hadamard.lean,Mathlib/Data/Matrix/Mul.lean,Mathlib/Data/Matrix/Notation.lean,Mathlib/Data/Matrix/Reflection.lean,Mathlib/Data/Matrix/RowCol.lean,Mathlib/Data/Matrix/Vec.lean,Mathlib/FieldTheory/PurelyInseparable/PerfectClosure.lean,Mathlib/Geometry/Manifold/GroupLieAlgebra.lean,Mathlib/GroupTheory/Coxeter/Matrix.lean,Mathlib/LinearAlgebra/CrossProduct.lean,Mathlib/LinearAlgebra/Matrix/BilinearForm.lean,Mathlib/LinearAlgebra/Matrix/DotProduct.lean,Mathlib/LinearAlgebra/Matrix/Nondegenerate.lean,Mathlib/LinearAlgebra/Matrix/Orthogonal.lean,Mathlib/LinearAlgebra/Matrix/PosDef.lean,Mathlib/LinearAlgebra/Matrix/SchurComplement.lean,Mathlib/LinearAlgebra/Matrix/SesquilinearForm.lean,Mathlib/LinearAlgebra/Matrix/Trace.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/PerfectPairing/Matrix.lean,Mathlib/LinearAlgebra/Projectivization/Constructions.lean,Mathlib/NumberTheory/NumberField/ProductFormula.lean,Mathlib/NumberTheory/SiegelsLemma.lean,Mathlib/RingTheory/DividedPowers/SubDPIdeal.lean,Mathlib/SetTheory/Ordinal/Veblen.lean,Mathlib/Topology/Algebra/Module/Equiv.lean,Mathlib/Topology/Homeomorph/Lemmas.lean,Mathlib/Topology/Instances/Matrix.lean,scripts/bench_summary.lean 49 5 ['eric-wieser', 'github-actions', 'grunweg', 'leanprover-community-bot-assistant'] nobody
236-81750
7 months ago
259-57672
259 days ago
7-54661
7 days
27399 MoritzBeroRoos
author:MoritzBeroRoos
 chore: replace every usage of ⬝ᵥ (with old \cdot) by ·ᵥ (with \centerdot) Discussion at [zulip](https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/.5Ccdot.20!.3D.20.5Ccenterdot). Currently the abbreviations `\cdot` and `\centerdot` resolve to different, with the naked eye nearly undistinguishable symbols (despite the c in cdot surely standing for `center`..): - `\cdot` gives ⬝ [U+2B1D](https://www.compart.com/en/unicode/U+2B1D) "Black Very Small Square" - `\centerdot` gives · [U+00B7](https://www.compart.com/en/unicode/U+00B7) "Middle Dot" Mathlib mostly uses the `\centerdot` variant, except for the dotProduct notation and some probably unsuspecting people wanting \centerdot but getting \cdot in their comments and 6 uses of a notation using the raw `\cdot` without any subscript at `Mathlib\Topology\Homotopy\Product.lean`. This PR replaces the dot product `⬝ᵥ` with its `\centerdot` counterpart `·ᵥ`. The related PR [here](https://github.com/leanprover/vscode-lean4/pull/639) can then overwrite the `\cdot` abbreviation, to produce the same symbol as the `centerdot` abbreviation does. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict new-contributor 133/133 Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Combinatorics/Configuration.lean,Mathlib/Combinatorics/SimpleGraph/AdjMatrix.lean,Mathlib/Combinatorics/SimpleGraph/LapMatrix.lean,Mathlib/Data/Matrix/Block.lean,Mathlib/Data/Matrix/ConjTranspose.lean,Mathlib/Data/Matrix/Hadamard.lean,Mathlib/Data/Matrix/Mul.lean,Mathlib/Data/Matrix/Notation.lean,Mathlib/Data/Matrix/Reflection.lean,Mathlib/Data/Matrix/RowCol.lean,Mathlib/Data/Matrix/Vec.lean,Mathlib/LinearAlgebra/CrossProduct.lean,Mathlib/LinearAlgebra/Matrix/BilinearForm.lean,Mathlib/LinearAlgebra/Matrix/DotProduct.lean,Mathlib/LinearAlgebra/Matrix/Nondegenerate.lean,Mathlib/LinearAlgebra/Matrix/Orthogonal.lean,Mathlib/LinearAlgebra/Matrix/PosDef.lean,Mathlib/LinearAlgebra/Matrix/SchurComplement.lean,Mathlib/LinearAlgebra/Matrix/SesquilinearForm.lean,Mathlib/LinearAlgebra/Matrix/Trace.lean,Mathlib/LinearAlgebra/PerfectPairing/Matrix.lean,Mathlib/LinearAlgebra/Projectivization/Constructions.lean,Mathlib/Topology/Instances/Matrix.lean 25 6 ['MoritzBeroRoos', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant'] nobody
236-43582
7 months ago
259-57673
259 days ago
7-62439
7 days
27479 iu-isgood
author:iu-isgood
 feat: Abel's Binomial Theorem We have formalized Abel's Binomial Theorem as part of an REU project. There are a few remaining sorrys, but we will finish them soon. I will edit this PR message later according to community rules. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-data new-contributor 326/0 Mathlib/Data/Nat/Choose/AbelBinomial.lean 1 28 ['ElifUskuplu', 'FrankieNC', 'github-actions', 'iu-isgood'] nobody
236-43343
7 months ago
265-41040
265 days ago
0-237
3 minutes
26462 PSchwahn
author:PSchwahn
 feat(LinearAlgebra/Projection): add results about inverse of `Submodule.prodEquivOfIsCompl` Add two theorems `Submodule.prodEquivOfIsCompl_symm_apply` and `Submodule.prodEquivOfIsCompl_symm_add`, which are API for `Submodule.prodEquivOfIsCompl`. We believe these theorems are useful; for example, we have used their statements in a [classification formalization project](https://github.com/LieLean/LowDimSolvClassification). Co-authored by: - [Viviana del Barco](https://github.com/vdelbarc) - [Gustavo Infanti](https://github.com/GuQOliveira) - [Exequiel Rivas](https://github.com/erivas) --- I am not sure whether the `prodEquivOfIsCompl_symm_apply` theorem should be tagged with `@[simp]`; this might lead to confluence issues. Opinions are welcome! [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-algebra new-contributor
label:t-algebra$
 10/0 Mathlib/LinearAlgebra/Projection.lean 1 7 ['PSchwahn', 'github-actions', 'joelriou', 'kckennylau'] joelriou
assignee:joelriou
220-14711
7 months ago
220-45814
220 days ago
73-43082
73 days
28623 gilesgshaw
author:gilesgshaw
 feat(Logic/Basic): minor additions and simplification of proofs Add new theorems and simplify proofs. Specifically, we add the family of related theorems `apply_dite_iff_exists`, `apply_dite_iff_forall`, `apply_ite_iff_and` and `apply_ite_iff_or`. For each other 'family' of theorems in the file that is analogous to the above, we do the following - Simplify proofs where possible, e.g. by appealing to the new theorems - Complete the family, if any of the corresponding four are missing - Rename to ensure consistency with the above pattern --- merge-conflict t-logic new-contributor 83/55 Archive/Examples/IfNormalization/Result.lean,Archive/Examples/IfNormalization/WithoutAesop.lean,Mathlib/Algebra/ContinuedFractions/Computation/Translations.lean,Mathlib/Algebra/MvPolynomial/Variables.lean,Mathlib/Algebra/Notation/Indicator.lean,Mathlib/LinearAlgebra/Matrix/Rank.lean,Mathlib/Logic/Basic.lean,Mathlib/MeasureTheory/Measure/WithDensity.lean,Mathlib/SetTheory/Ordinal/Notation.lean 9 12 ['eric-wieser', 'gilesgshaw', 'github-actions', 'mathlib4-merge-conflict-bot', 'plp127'] awainverse
assignee:awainverse
219-49613
7 months ago
219-49614
219 days ago
10-61840
10 days
25778 thefundamentaltheor3m
author:thefundamentaltheor3m
 feat: Monotonicity of `setIntegral` for nonnegative functions This PR makes it easier to prove monotonicity of the Bochner integral on sets for nonnegative functions by removing the stronger assumption required by the general monotonicity lemma that both of the functions being compared must be integrable. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-measure-probability new-contributor 8/0 Mathlib/MeasureTheory/Integral/Bochner/Set.lean 1 6 ['RemyDegenne', 'github-actions', 'sgouezel', 'thefundamentaltheor3m'] nobody
217-45335
7 months ago
308-53173
308 days ago
0-11893
3 hours
29588 Periecle
author:Periecle
 feat(Analysis/Complex/Residue): Implement residue theory for complex functions at isolated singularities # Add basic residue theory for complex functions This PR introduces the residue theory implementation in mathlib. ## Main additions - **`HasIsolatedSingularityAt f c`**: Predicate for functions with isolated singularities at point `c` - **`residue f c hf`**: The residue of `f` at isolated singularity `c`, defined via circle integrals - **Radius independence**: `residue_eq_two_pi_I_inv_smul_circleIntegral` - residue equals normalized circle integral for any valid radius - **Holomorphic residues**: `residue_of_holomorphic` - functions holomorphic in a neighborhood have zero residue - **Simple pole formula**: `residue_simple_pole` - for `f(z) = (z-c)⁻¹ * g(z)`, residue equals `g(c)` ## Implementation notes - Builds on existing circle integral infrastructure in `CauchyIntegral.lean` - Uses `Classical.choose` to extract witness radius from isolated singularity condition - Comprehensive documentation with mathematical context and examples - Establishes foundation for residue theorem, argument principle, and other applications ## Examples included - `residue(1/z, 0) = 1` (canonical simple pole) - Radius independence demonstration - Zero residues for holomorphic functions This provides the essential building blocks for complex analysis and first step to formalize residue theory. awaiting-author t-analysis new-contributor 383/0 Mathlib/Analysis/Complex/Residue/Basic.lean 1 17 ['Periecle', 'github-actions', 'hrmacbeth', 'llllvvuu', 'loefflerd'] nobody
204-48813
6 months ago
216-53176
216 days ago
0-1498
24 minutes
29657 jcreinhold
author:jcreinhold
 feat(CategoryTheory/MarkovCategory): add Markov categories This PR adds Markov categories to the category theory library. A Markov category is a symmetric monoidal category where every object has canonical copy and delete morphisms that form commutative comonoids. ## What this gives mathlib In a Markov category, morphisms model probabilistic processes. The copy morphism `X → X ⊗ X` creates perfect correlation (both outputs always equal). The delete morphism `X → I` marginalizes (sums/integrates out variables). This structure captures probability theory categorically. The same theorem proves results for: - Finite probability (stochastic matrices) - Measure theory (Markov kernels) - Kleisli categories of probability monads Fritz (2020) used this to prove categorical versions of Fisher-Neyman, Basu's theorem, and other core statistics results. ## Implementation - `MarkovCategory`: Extends `SymmetricCategory` with canonical comonoid structure - `copyMor X : X ⟶ X ⊗ X` and `delMor X : X ⟶ I` for each object - Coherence axioms: commutativity, counitality, coassociativity - Compatibility with tensor products Key design point: The comonoid structure is canonical (fields of the typeclass), not chosen. This matches the probability interpretation where there's exactly one way to copy/marginalize. ## Examples included 1. Cartesian categories: Every cartesian monoidal category forms a Markov category where copy is the diagonal `x ↦ (x,x)` and delete is the terminal morphism. All morphisms are deterministic. 2. FinStoch: Objects are finite types. Morphisms are stochastic matrices (rows sum to 1). This models finite probability spaces with the usual matrix multiplication for composition. ## Scope and review notes This PR provides the basic structure only. Future PRs would add: - Conditional independence - Sufficient statistics - Connection to measure-theoretic probability - More examples (Kleisli categories, Gaussian categories) I'm neither an expert in this material nor in Lean; I've only read a few papers on Markov categories and have gone through tutorial material in Lean. Please review for mathematical correctness and idiomatic Lean. I kept this PR small to check if mathlib wants this addition and to ensure it meets repository standards. ## Why add this now Markov categories provide a useful abstraction level for probability in type theory. Adding it to mathlib enables future work on categorical probability and statistics. In particular, I'm working on a probabilistic programming library and would like to write some proofs using these constructs. ## References - Fritz, T. (2020). [A synthetic approach to Markov kernels, conditional independence and theorems on sufficient statistics](https://arxiv.org/abs/1908.07021). *Advances in Mathematics*, 370, 107239. - Cho, K., & Jacobs, B. (2019). [Disintegration and Bayesian inversion via string diagrams](https://arxiv.org/abs/1709.00322). *Mathematical Structures in Computer Science*, 29(7), 938-971. --- All definitions include docstrings. The PR has tests for the core functionality. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory new-contributor 2414/7 Mathlib.lean,Mathlib/CategoryTheory/Bicategory/Monad/Basic.lean,Mathlib/CategoryTheory/CopyDiscardCategory/Basic.lean,Mathlib/CategoryTheory/CopyDiscardCategory/Deterministic.lean,Mathlib/CategoryTheory/MarkovCategory/Basic.lean,Mathlib/CategoryTheory/MarkovCategory/Cartesian.lean,Mathlib/CategoryTheory/MarkovCategory/FinStoch/Basic.lean,Mathlib/CategoryTheory/MarkovCategory/FinStoch/Braided.lean,Mathlib/CategoryTheory/MarkovCategory/FinStoch/CopyDiscard.lean,Mathlib/CategoryTheory/MarkovCategory/FinStoch/Markov.lean,Mathlib/CategoryTheory/MarkovCategory/FinStoch/Monoidal.lean,Mathlib/CategoryTheory/Monoidal/Bimon_.lean,Mathlib/CategoryTheory/Monoidal/CommComon_.lean,Mathlib/CategoryTheory/Monoidal/Comon_.lean,MathlibTest/CategoryTheory/MarkovCategory.lean,docs/references.bib 16 28 ['github-actions', 'jcreinhold', 'joelriou', 'mathlib4-merge-conflict-bot'] nobody
203-49644
6 months ago
208-55768
208 days ago
0-10638
2 hours
26178 ppls-nd-prs
author:ppls-nd-prs
 feat(CategoryTheory/Limits): Fubini for products We show that the product of products is a product indexed by the sigma type. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory new-contributor 17/0 Mathlib/CategoryTheory/Limits/Shapes/Products.lean 1 6 ['chrisflav', 'github-actions', 'leanprover-community-bot-assistant', 'ppls-nd-prs', 'robin-carlier'] nobody
199-63857
6 months ago
300-73257
300 days ago
0-47289
13 hours
28630 Antidite
author:Antidite
 feat(Archive/Imo): right isosceles configuration in the complex plane feat(Archive/Imo): right isosceles configuration in the complex plane This adds `Archive/Imo/Imo1975Q3.lean`, formalizing a triangle configuration with points A=0, B=1, C=z and auxiliary points R, P, Q built via complex rotations and sine-based scale factors. Main results: * `angle_and_distance`: ∠QRP = π/2 and dist Q R = dist R P. * Key identity `QRP_rot90`: (Q z).z − R.z = e^{iπ/2} · ((P z).z − R.z). Design/Style: * Minimal imports; module docstring; semantic lemma names; all definitions and theorems live under the namespace `IMO.TriangleConfig`. Moves: - (none) Deletions: - (none) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) IMO awaiting-author new-contributor 196/0 Archive.lean,Archive/Imo/Imo1975Q3.lean 2 36 ['Antidite', 'LLaurance', 'github-actions', 'jsm28'] jsm28
assignee:jsm28
194-29603
6 months ago
194-29603
194 days ago
46-26438
46 days
29926 jcreinhold
author:jcreinhold
 feat(CategoryTheory/MarkovCategory): add basic finite stochastic matrices definitions to Markov category This PR introduces FinStoch, the category of finite stochastic matrices, as a concrete example of a Markov category. This PR builds on #29925, #29939, and #29919 and was split up from #29657. ## Main additions ### 1. Core definitions (`FinStoch/Basic.lean`) - `StochasticMatrix m n`: Matrices where rows sum to 1, representing conditional probabilities P(j|i) - `FinStoch`: The category with finite types as objects and stochastic matrices as morphisms - `DetMorphism`: Deterministic matrices (exactly one 1 per row) with their underlying functions - Composition: Matrix multiplication preserves row-stochasticity via the Chapman-Kolmogorov equation Key design choices: - Row-stochastic convention: entry (i,j) is P(output=j | input=i) - Deterministic morphisms tracked separately for structural isomorphisms ### 2. Monoidal structure (`FinStoch/Monoidal.lean`) Implements tensor products modeling independent parallel processes: - Tensor on objects: Cartesian product of finite types - Tensor on morphisms: Kronecker product P((j₁,j₂)|(i₁,i₂)) = P(j₁|i₁) × P(j₂|i₂) - Structural morphisms: Associator, unitors use deterministic permutations - Coherence**: Pentagon and triangle identities verified computationally ## Mathematical significance FinStoch provides the canonical example of a Markov category: - Morphisms: Stochastic matrices/Markov chains - Composition: Chapman-Kolmogorov equation for multi-step transitions - Tensor: Independent parallel processes This models finite probability spaces categorically, where: - Objects represent sample spaces - Morphisms represent probabilistic transitions - Tensor products model independence ## References Fritz (2020) - [ ] depends on: #29925 merge-conflict t-category-theory new-contributor 1437/0 Mathlib.lean,Mathlib/CategoryTheory/CopyDiscardCategory/Basic.lean,Mathlib/CategoryTheory/CopyDiscardCategory/Deterministic.lean,Mathlib/CategoryTheory/MarkovCategory/Basic.lean,Mathlib/CategoryTheory/MarkovCategory/Cartesian.lean,Mathlib/CategoryTheory/MarkovCategory/FinStoch/Basic.lean,Mathlib/CategoryTheory/MarkovCategory/FinStoch/Monoidal.lean,MathlibTest/CategoryTheory/MarkovCategory.lean,docs/references.bib 9 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
188-40058
6 months ago
unknown
0-0
0 seconds
16773 arulandu
author:arulandu
 feat(Probability/Distributions): formalize Beta distribution Formalize Beta distribution, using Gamma distribution as a reference. Added real-valued beta wrapper, in the manner of gamma. Thanks to @EtienneC30 for help with casting real <-> complex. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author new-contributor t-measure-probability 286/1 Mathlib.lean,Mathlib/Analysis/SpecialFunctions/Gamma/Beta.lean,Mathlib/Probability/Distributions/Beta.lean 3 50 ['EtienneC30', 'arulandu', 'github-actions', 'mathlib4-merge-conflict-bot', 'vihdzp'] arulandu
assignee:arulandu
188-38908
6 months ago
578-66457
578 days ago
1-21124
1 day
30460 janithamalith
author:janithamalith
 feat(Nat): add lemma nat_card_orbit_mul_card_stabilizer_eq_card_group Added a lemma `nat_card_orbit_mul_card_stabilizer_eq_card_group` which is the Nat.card version of MulAction.card_orbit_mul_card_stabilizer_eq_card_group --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-group-theory new-contributor 6/0 Mathlib/GroupTheory/GroupAction/CardCommute.lean 1 17 ['github-actions', 'kckennylau', 'plp127', 'tb65536'] tb65536
assignee:tb65536
178-49158
5 months ago
178-49158
178 days ago
8-8414
8 days
25225 xcloudyunx
author:xcloudyunx
 feat(Combinatorics/SimpleGraph): Eulerian walk in connected graph contains all vertices --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-combinatorics new-contributor 16/0 Mathlib/Combinatorics/SimpleGraph/Trails.lean 1 6 ['IvanRenison', 'github-actions', 'vlad902'] kmill
assignee:kmill
177-12690
5 months ago
177-12690
177 days ago
148-3338
148 days
30828 DeVilhena-Paulo
author:DeVilhena-Paulo
 feat: implementation of `Finmap.merge` The main contribution of this pull request is the implementation of a `merge` function for finite maps (`Finmap`). The construction relies on the definition of a `merge` function for association lists (`AList`). There is also a side (unrelated) contribution on `Mathlib/Data/List/Permutation.lean`: the addition of a theorem about the permutation of a list with a head element (that is, a list of the form `a :: l`). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor 449/3 Mathlib/Data/Finmap.lean,Mathlib/Data/List/AList.lean,Mathlib/Data/List/Permutation.lean,Mathlib/Data/List/Sigma.lean 4 1 ['github-actions'] nobody
175-36122
5 months ago
175-36190
175 days ago
0-83
1 minute
28676 sun123zxy
author:sun123zxy
 feat(NumberTheory/ArithmeticFunction): wrap `Nat.totient` as an `ArithmeticFunction` This wraps the Euler's totient function `Nat.totient` into a new `ArithmeticFunction` `ϕ`, with some basic identities such as `ϕ * ζ = id` and `μ * id = ϕ.` --- We use the notation `ϕ` to distinguish from `Nat.totient`'s notation `φ`, however this might be controversial. Suggestions are welcome! [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory new-contributor large-import merge-conflict awaiting-author 45/5 Mathlib/NumberTheory/ArithmeticFunction.lean 1 19 ['MichaelStollBayreuth', 'SnirBroshi', 'b-mehta', 'eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot', 'riccardobrasca', 'sun123zxy'] MichaelStollBayreuth
assignee:MichaelStollBayreuth
170-68561
5 months ago
186-43237
186 days ago
47-58551
47 days
30299 franv314
author:franv314
 feat(Topology/Instances): Cantor set Prove that the Cantor set has empty interior and the cardinality of the continuum as discussed on [Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/A.20few.20results.20about.20the.20Cantor.20set/with/543560670) Moves: - Mathlib.Topology.Instances.CantorSet -> Mathlib.Topology.Instances.CantorSet.Basic --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor merge-conflict file-removed awaiting-author t-topology 355/2 Mathlib.lean,Mathlib/Topology/Instances/CantorSet/Basic.lean,Mathlib/Topology/Instances/CantorSet/Cardinality.lean,Mathlib/Topology/Instances/CantorSet/Lemmas.lean 4 5 ['github-actions', 'grunweg', 'kckennylau', 'mathlib4-merge-conflict-bot'] nobody
170-60291
5 months ago
191-42920
191 days ago
0-2409
40 minutes
30303 franv314
author:franv314
 chore(Topology/Instances): add deprecated module Add deprecated module to moved Cantor set file. --- - [ ] depends on: #30299 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR new-contributor 486/124 Mathlib.lean,Mathlib/Topology/Instances/CantorSet.lean,Mathlib/Topology/Instances/CantorSet/Basic.lean,Mathlib/Topology/Instances/CantorSet/Cardinality.lean,Mathlib/Topology/Instances/CantorSet/Lemmas.lean 5 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
170-60289
5 months ago
191-40789
191 days ago
0-340
5 minutes
29871 zach1502
author:zach1502
 feat(Matrix/Transvection): Gauss pivot determinant identity and pivot preservation This PR adds two lemmas formalizing standard Gaussian pivot identities: * `Matrix.Transvection.listTransvecCol_mul_mul_listTransvecRow_pivot`: After applying the canonical left/right transvection products that clear the last column and row, the pivot (bottom-right) entry of a matrix is unchanged. Marked `@[simp]`. * `Matrix.Transvection.det_eq_detTopLeft_mul_pivot`: If the pivot entry is nonzero, then the determinant of the matrix factors as the determinant of the top-left block times the pivot entry, after performing the canonical transvections. This is the usual Gauss–pivot determinant identity. * Added simple usage tests in `MathlibTest/matrix.lean` to check that the new lemmas are usable by `simp`/`simpa`. --- --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-algebra new-contributor
label:t-algebra$
 94/0 Mathlib/LinearAlgebra/Matrix/Transvection.lean,MathlibTest/matrix.lean 2 3 ['github-actions', 'riccardobrasca', 'zach1502'] nobody
164-59812
5 months ago
164-59812
164 days ago
41-53612
41 days
30158 nicolaviolette
author:nicolaviolette
 feat: combinatorics simplegraph basic --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-combinatorics new-contributor 9/4 Mathlib/Combinatorics/SimpleGraph/Basic.lean 1 3 ['b-mehta', 'github-actions'] b-mehta
assignee:b-mehta
163-79342
5 months ago
163-79342
163 days ago
31-69826
31 days
26901 5hv5hvnk
author:5hv5hvnk
 feat: a simproc version of `compute_degree` Wrap `compute_degree` in a simproc for use by simp. Closes #22219. --- awaiting-CI new-contributor merge-conflict awaiting-author t-meta 198/0 Mathlib.lean,Mathlib/Tactic/Simproc/PolynomialDegree.lean,MathlibTest/polynomial_degree_simproc.lean 3 19 ['5hv5hvnk', 'YaelDillies', 'adomani', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
161-39610
5 months ago
282-40980
282 days ago
0-267
4 minutes
30150 imbrem
author:imbrem
 feat(CategoryTheory/Monoidal): to_additive for MonoidalCategory Add `AddMonoidalCategory`, the additive version of `MonoidalCategory`. To get this to work, I needed to _remove_ the `to_additive` attributes in `Discrete.lean`, since existing code relies on the `AddMonoid M → MonoidalCategory M` instance. For now, we simply implement the additive variants by hand instead. --- As discussed in #28718; I added an `AddMonoidalCategory` struct and tagged `MonoidalCategory` with `to_additive`, along with the lemmas in `Category.lean`. I think this is the right approach, since under this framework the "correct" additive version of `Discrete.lean` would be mapping an `AddMonoid` to an `AddMonoidalCategory`. Next steps would be to: - Make `monoidal_coherence` and `coherence` support `AddMonoidalCategory` - Add `CocartesianMonoidalCategory` extending `AddMonoidalCategory` [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory large-import new-contributor merge-conflict awaiting-zulip t-meta 444/125 Mathlib/CategoryTheory/Monoidal/Category.lean,Mathlib/CategoryTheory/Monoidal/Discrete.lean,Mathlib/Tactic/ToAdditive/GuessName.lean 3 22 ['JovanGerb', 'YaelDillies', 'github-actions', 'imbrem', 'mathlib4-merge-conflict-bot'] nobody
155-2601
5 months ago
194-67667
194 days ago
1-160
1 day
15651 TpmKranz
author:TpmKranz
 feat(Computability/NFA): operations for Thompson's construction Lays the groundwork for a proof of equivalence of RE and NFA, w.r.t. described language. Actual connection to REs comes later, after the groundwork for the opposite direction has been laid. Third chunk of #12648 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-computability merge-conflict awaiting-author awaiting-zulip 307/5 Mathlib/Computability/NFA.lean 1 27 ['TpmKranz', 'YaelDillies', 'dupuisf', 'github-actions', 'leanprover-community-bot-assistant', 'meithecatte', 'rudynicolop'] nobody
150-19733
4 months ago
569-47121
569 days ago
45-84611
45 days
15649 TpmKranz
author:TpmKranz
 feat(Computability): introduce Generalised NFA as bridge to Regular Expression Lays the groundwork for a proof of equivalence of NFA and RE, w.r.t. described language. Actual connection to NFA comes later, after the groundwork for the opposite direction has been laid. Second chunk of #12648 --- - [x] depends on: #15647 [Data.FinEnum.Option unchanged since then] [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-computability merge-conflict awaiting-author awaiting-zulip 298/0 Mathlib.lean,Mathlib/Computability/GNFA.lean,Mathlib/Computability/Language.lean,Mathlib/Computability/RegularExpressions.lean,docs/references.bib 5 7 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'meithecatte', 'trivial1711'] nobody
149-35974
4 months ago
494-85904
494 days ago
23-54870
23 days
5919 MithicSpirit
author:MithicSpirit
 feat: implement orthogonality for AffineSubspace Define `AffineSubspace.orthogonal` and `AffineSubspace.IsOrtho`, as well as develop an API emulating that of `Submodule.orthogonal` and `Submodule.IsOrtho`, respectively. Additionally, provide some relevant lemmas exclusive to affine subspaces, which are mostly to do with the relationship between orthogonality and `AffineSubspace.Parallel`. Closes #5539 --- Still WIP as I need to add more docstrings as well as notations for the new definitions. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP new-contributor merge-conflict help-wanted t-analysis 287/0 Mathlib.lean,Mathlib/Analysis/InnerProductSpace/AffineSubspace.lean 2 7 ['MithicSpirit', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] MithicSpirit
assignee:MithicSpirit
148-73831
4 months ago
832-12326
832 days ago
0-433
7 minutes
13442 dignissimus
author:dignissimus
 feat: mabel tactic for multiplicative abelian groups Mabel tactic for multiplicative abelian groups (#10361) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor merge-conflict modifies-tactic-syntax awaiting-author help-wanted t-meta 439/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/MAbel.lean,MathlibTest/mabel.lean 4 11 ['BoltonBailey', 'dignissimus', 'github-actions', 'joneugster', 'kbuzzard', 'mathlib4-merge-conflict-bot'] joneugster
assignee:joneugster
148-73567
4 months ago
598-65653
598 days ago
0-16
16 seconds
14237 js2357
author:js2357
 feat: Define the localization of a fractional ideal at a prime ideal Define the localization of a fractional ideal at a prime ideal, and prove some basic properties. --- This PR is part 3 out of 4 of a proof of `isDedekindDomain_iff_isDedekindDomainDvr`. Part 4 is available here: #14242 - [x] depends on: #14099 Part 1 - [x] depends on: #14216 Part 2 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra new-contributor
label:t-algebra$
 230/0 Mathlib.lean,Mathlib/RingTheory/FractionalIdeal/LocalizedAtPrime.lean,Mathlib/RingTheory/Localization/Basic.lean 3 22 ['Vierkantor', 'YaelDillies', 'github-actions', 'js2357', 'kbuzzard', 'leanprover-community-bot-assistant', 'leanprover-community-mathlib4-bot', 'mathlib4-merge-conflict-bot'] Vierkantor
assignee:Vierkantor
148-73565
4 months ago
569-48701
569 days ago
26-40037
26 days
15224 AnthonyBordg
author:AnthonyBordg
 feat(CategoryTheory/Sites): covering families and their associated Grothendieck topology Define covering families on a category and their associated Grothendieck topology by using the API for `Coverage`. Give an explicit characterization of the covering sieves of the said topology. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory new-contributor 112/0 Mathlib.lean,Mathlib/CategoryTheory/Sites/CoveringFamilies.lean 2 21 ['AnthonyBordg', 'adamtopaz', 'dagurtomas', 'github-actions', 'joelriou', 'mathlib4-merge-conflict-bot'] nobody
148-73436
4 months ago
624-39667
624 days ago
1-48443
1 day
17587 kmill
author:kmill
 feat: Sym2-as-Finset theory --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data new-contributor 105/3 Mathlib/Combinatorics/SimpleGraph/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Finite.lean,Mathlib/Data/Sym/Sym2.lean,Mathlib/RingTheory/Polynomial/Vieta.lean 4 11 ['FordUniver', 'YaelDillies', 'github-actions', 'kmill', 'mathlib4-merge-conflict-bot'] nobody
148-73282
4 months ago
unknown
0-0
0 seconds
18630 tomaz1502
author:tomaz1502
 feat(Computability.Timed): Formalization of runtime complexity of List.mergeSort This PR adds the formalization of the runtime complexity of the merge sort algorithm, defined in `Data/List/Sort`. Requires: https://github.com/leanprover-community/mathlib4/pull/15451 References: - Previous PR on mathlib3: https://github.com/leanprover-community/mathlib3/pull/14494/ - First discussion on Zulip: https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/BSc.20Final.20Project/near/220647062 - Second disussion on Zulip: https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/Formalization.20of.20Runtime.20Complexity.20of.20Sorting.20Algorithms/near/284184450 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability new-contributor 526/0 Mathlib.lean,Mathlib/Computability/Timed/InsertionSort.lean,Mathlib/Computability/Timed/Merge.lean,Mathlib/Computability/Timed/MergeSort.lean,Mathlib/Computability/Timed/Split.lean 5 9 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
148-73280
4 months ago
527-38683
527 days ago
0-77273
21 hours
20648 anthonyde
author:anthonyde
 feat: formalize regular expression -> εNFA The file `Computability/RegularExpressionsToEpsilonNFA.lean` contains a formal definition of Thompson's method for constructing an `εNFA` from a `RegularExpression` and a proof of its correctness. --- - [x] depends on: #20644 - [x] depends on: #20645 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability awaiting-zulip new-contributor 490/0 Mathlib.lean,Mathlib/Computability/RegularExpressionsToEpsilonNFA.lean,docs/references.bib 3 7 ['anthonyde', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'meithecatte', 'qawbecrdtey'] nobody
148-73142
4 months ago
346-19671
346 days ago
75-77754
75 days
21903 yhtq
author:yhtq
 feat: add from/toList between `FreeSemigroup` and `List` with relative theorems Add from/toList between `FreeSemigroup` and `List` with relative theorems, as well as an incidental definition of lexicographic order on `FreeSemigroup`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor awaiting-CI large-import merge-conflict
label:t-algebra$
 169/0 Mathlib/Algebra/Free.lean 1 12 ['YaelDillies', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
148-73002
4 months ago
375-56957
375 days ago
50-8745
50 days
22159 shetzl
author:shetzl
 feat: add definition of pushdown automata Add the definition of pushdown automata and their two acceptance conditions: acceptance based on empty stack and acceptance based on final state. Co-authored-by: Tobias Leichtfried --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability awaiting-author new-contributor 70/0 Mathlib.lean,Mathlib/Computability/PDA.lean 2 35 ['YaelDillies', 'github-actions', 'madvorak', 'mathlib4-merge-conflict-bot', 'shetzl'] nobody
148-72996
4 months ago
395-67009
395 days ago
20-81771
20 days
22302 658060
author:658060
 feat: add `CategoryTheory.Topos.Power` This is a continuation of #21281 with the end goal of defining topoi in Mathlib. It introduces the notion of a power object in a category with a subobject classifier, which is a special case of an internal hom. The definition `HasPowerObjects C` contained in this PR is all that remains before `IsTopos C` can be defined. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory new-contributor 312/0 Mathlib.lean,Mathlib/CategoryTheory/Topos/Power.lean 2 3 ['github-actions', 'joelriou', 'mathlib4-merge-conflict-bot'] b-mehta
assignee:b-mehta
148-72987
4 months ago
415-20589
415 days ago
0-1528
25 minutes
22790 mhk119
author:mhk119
 feat: Extend `taylor_mean_remainder_lagrange` to `x < x_0` The `taylor_mean_remainder_lagrange` theorem has the assumption that $x_0 < x$. In many applications, we need $x < x_0$ and one cannot use the current version to obtain this (see [zulip](https://leanprover.zulipchat.com/#narrow/channel/116395-maths/topic/Taylor's.20theorem)). This PR introduces a set of theorems that push negations through Taylor expansions so that one can extend `taylor_mean_remainder_lagrange` to the case when $x < x_0$. These theorems should also be useful elsewhere since they are quite general. merge-conflict awaiting-author t-analysis new-contributor 111/1 Mathlib/Analysis/Calculus/Deriv/Basic.lean,Mathlib/Analysis/Calculus/IteratedDeriv/Lemmas.lean,Mathlib/Analysis/Calculus/Taylor.lean 3 13 ['Paul-Lez', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot', 'mhk119'] nobody
148-72974
4 months ago
377-1691
377 days ago
23-16830
23 days
24333 xcloudyunx
author:xcloudyunx
 feat(Combinatorics/SimpleGraph): cycle graph implementation for generic vertex types The existing `cycleGraph` implementation under Combinatorics/SimpleGraph/Circulant.lean only operates over `Fin n`. This PR implements a cycle graph implementation over any generic vertex type. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-combinatorics new-contributor 187/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Cycle.lean 2 42 ['IvanRenison', 'github-actions', 'mathlib4-merge-conflict-bot', 'vlad902'] kmill
assignee:kmill
148-72821
4 months ago
234-71402
234 days ago
123-18878
123 days
25739 literandltx
author:literandltx
 feat(NumberTheory/LegendreSymbol): Add sqrt‐of‐residue theorems for p=4k+3 and p=8k+5 Add a new file `QuadraticResidueRoots.lean` under `Mathlib/NumberTheory/LegendreSymbol/` that proves two explicit “square-root of quadratic residue” theorems for primes of the specific form. - **`exists_sqrt_of_residue_mod4_eq3`** for primes `p = 4*k + 3` - **`exists_sqrt_of_residue_mod8_eq5`** for primes `p = 8*k + 5` It also introduces the helper lemmas `euler_criterion_traditional` and `legendreSym.at_two_mod8_eq_5`. Import lines in `Mathlib.lean` and `Mathlib/NumberTheory/LegendreSymbol/Basic.lean` have been updated accordingly. merge-conflict awaiting-author t-number-theory new-contributor 217/0 Mathlib.lean,Mathlib/NumberTheory/LegendreSymbol/Basic.lean,Mathlib/NumberTheory/LegendreSymbol/QuadraticReciprocity.lean,Mathlib/NumberTheory/LegendreSymbol/QuadraticResidueRoots.lean 4 3 ['github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot'] literandltx
assignee:literandltx
148-72672
4 months ago
291-9835
291 days ago
17-63153
17 days
26300 igorkhavkine
author:igorkhavkine
 feat(Analysis/Calculus/FDeriv): continuous differentiability from continuous partial derivatives on an open domain in a product space If a function `f : E × F → G` is continuously differentiable, then its partial derivatives along `E` and `F` are also continuous. The non-trivial converse implication holds when the partial derivatives are continuous on an open domain, and they can be added together to give the total derivative of `f`. See this [#mathlib4 > Partial derivatives @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Partial.20derivatives/near/520995477) and the containing thread for some discussion. The PR creates a new import (`Mathlib.Analysis.Calculus.FDeriv.Partial`), where other results about partial derivatives could go in the future. --- *this is the migration of #25304 to the PR-from-fork workflow* - [x] depends on: #25564 - [x] depends on: #26273 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP new-contributor merge-conflict awaiting-author t-analysis 468/0 Mathlib.lean,Mathlib/Analysis/Calculus/FDeriv/Partial.lean,Mathlib/Analysis/Normed/Operator/BoundedLinearMaps.lean 3 21 ['YaelDillies', 'agjftucker', 'github-actions', 'igorkhavkine', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'sgouezel'] sgouezel
assignee:sgouezel
148-72460
4 months ago
245-34450
245 days ago
44-77065
44 days
26594 metakunt
author:metakunt
 feat(Algebra/Polynomial/ZMod): Add Polynomial.equiv_of_nat_of_polynomial_zmod This adds an explicit bijection between the naturals and $$\mathbb{Z}/n\mathbb{Z}[X]$$ in a canonical way. --- I feel that some API is missing to make the theorem shorter, I have no idea what lemmas to extract though. Also I don't know when to use spaces and when not, so I did it best effort. merge-conflict awaiting-author t-algebra new-contributor
label:t-algebra$
 465/0 Mathlib.lean,Mathlib/Algebra/Polynomial/ZMod.lean 2 3 ['Ruben-VandeVelde', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
148-72312
4 months ago
264-29670
264 days ago
25-5689
25 days
26757 fweth
author:fweth
 feat(CategoryTheory/Topos): define elementary topos This commit begins the formalization of the notion of an *elementary topos*, following the definition in \[Mac Lane & Moerdijk, *Sheaves in Geometry and Logic* (1992), Ch. IV, Section 1]. It introduces the file `Mathlib/CategoryTheory/Topos/Basic.lean`, which currently includes: * The definition of an elementary topos. * Proof that the power object map is a functor * Theorem about pullbacks of characterstic maps Subobject classifiers, which are used in the definition, have already been defined in `CategoryTheory/Topos/Classifier.lean` Work in progress: further formalization of the section is planned. Questions: * Should the definition of power objects be separated into its own file/module, perhaps under `CategoryTheory/Topos/PowerObject.lean`? * Is the notation `P` / `P_morph` / `P_functor` for the power object functor on objects / morphisms / total acceptable? * Should the comments and docstrings rather use the notation from the book, where `g ∘ f` denotes arrow composition from righ to left, or the Lean variant `f ≫ g`? Klaus Gy klausgy@gmail.com --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory new-contributor 401/66 Mathlib.lean,Mathlib/CategoryTheory/Closed/PowerObjects.lean,Mathlib/CategoryTheory/Limits/Shapes/BinaryProducts.lean,Mathlib/CategoryTheory/Limits/Shapes/Equalizers.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/CommSq.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Equalizer.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/Basic.lean,Mathlib/CategoryTheory/Subobject/Basic.lean,Mathlib/CategoryTheory/Topos/Classifier.lean 9 17 ['fweth', 'github-actions', 'joelriou', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] joelriou
assignee:joelriou
148-72307
4 months ago
177-61117
177 days ago
62-14616
62 days
27155 Pjotr5
author:Pjotr5
 feat: Shearer's bound on the independence number of triangle free graphs I added the file IndependenceNumber.lean to the Mathlib.Combinatorics.SimpleGraph.Triangle folder. It contains a proof of a theorem by Shearer on the independence number of triangle-free graphs . I was told this might be useful to add to Mathlib a Zullip thread linked [here](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Convexity.20of.20a.20specific.20function/with/510469526). I tried to comply as much as I could with the Mathlib style guide, but I realise that there is probably still a significant amount of editing to be done. For one thing: there are probably some lemmas and theorems in there that might be better suited in other files, but since this is my first PR I though I would all put it in one file before starting to edit a bunch of files. I was also advised to split up the file into multiple smaller PRs, but since everything is basically serving this one proof I could not really find a natural way to do that. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-combinatorics new-contributor 1266/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Triangle/IndependenceNumber.lean 2 10 ['Pjotr5', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] nobody
148-72270
4 months ago
275-59879
275 days ago
0-287
4 minutes
27753 YunkaiZhang233
author:YunkaiZhang233
 feat(CategoryTheory): implemented proofs for factorisation categories being equivalent to iterated comma categories in two ways --- Completed one of the tasks in TODOs, shown and implemented the details for (X/C)/f ≌ Factorisation f ≌ f/(C/Y). This is migrated from my previous PR #22390 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory new-contributor 70/1 Mathlib/CategoryTheory/Category/Factorisation.lean 1 13 ['YunkaiZhang233', 'b-mehta', 'github-actions', 'mathlib4-merge-conflict-bot', 'robin-carlier'] nobody
148-72115
4 months ago
259-43278
259 days ago
0-3448
57 minutes
27850 fyqing
author:fyqing
 feat: 0-dimensional manifolds are discrete and countable This is the converse direction of the classification of 0-dimensional manifolds. The other direction was shown in #22105. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-differential-geometry new-contributor 80/0 Mathlib.lean,Mathlib/Geometry/Manifold/ZeroDim.lean 2 14 ['fyqing', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot', 'tb65536'] grunweg
assignee:grunweg
148-72113
4 months ago
258-17940
258 days ago
0-5814
1 hour
28125 nonisomorphiclinearmap
author:nonisomorphiclinearmap
 feat(Combinatorics): basic definition of simplicial complexes This PR introduces the basic definition of a finite (abstract) simplicial complex, located in Mathlib/Combinatorics/SimplicialComplex/Basic.lean. --- This is our first contribution to mathlib. This work was done as part of the Fields Institute Summer Undergraduate Program on formalization in topological combinatorics. Eventually, we aim to formalize Lovasz's proof of the Kneser Conjecture and this is a small stepping stone in that direction. Some other commits will shortly depend on this one. We would like to acknowledge the Fields Institute for Research in Mathematical Sciences for their sponsorship. We would also like to thank our supervisors, Professor Chris Kapulkin and Mr. Daniel Carranza, for their guidance and support throughout this project. We would also like to thank our group members Tom Lindquist and Quang Minh Nguyen for our fruitful discussions. merge-conflict t-combinatorics new-contributor 374/0 Mathlib.lean,Mathlib/Combinatorics/SimplicialComplex/Basic.lean,Mathlib/Combinatorics/SimplicialComplex/Category.lean,Mathlib/Combinatorics/SimplicialComplex/FacePoset.lean,Mathlib/Combinatorics/SimplicialComplex/Hom.lean 5 2 ['github-actions', 'mathlib4-merge-conflict-bot'] awainverse
assignee:awainverse
148-71981
4 months ago
148-71982
148 days ago
99-64548
99 days
28530 nonisomorphiclinearmap
author:nonisomorphiclinearmap
 feat(Combinatorics/SimplicialComplex/Topology): add standard simplices and geometric realisation (colimit + functoriality) Introduce the standard simplex on a finite vertex set and build the geometric realisation |X| of a simplicial complex. Prove that |X| is the colimit of the face diagram δ_X : X.faces ⥤ TopCat, and define the induced map on realisations |φ| : |X| ⟶ |Y| for a simplicial map φ. Show that the abstract map from colimit functoriality agrees with the concrete push-forward of barycentric coordinates. Package these into a functor SimplicialComplexCat ⥤ TopCat. --- This is our first contribution to mathlib. This work was done as part of the Fields Institute Summer Undergraduate Program on formalization in topological combinatorics. Eventually, we aim to formalize Lovasz's proof of the Kneser Conjecture and this lays the groundwork to do this. We would like to acknowledge the Fields Institute for Research in Mathematical Sciences for their sponsorship. We would also like to thank our supervisors, Professor Chris Kapulkin and Mr. Daniel Carranza, for their guidance and support throughout this project. I would also like to thank our group members Sebastian Kumar, Tom Lindquist and Quang Minh Nguyen for our fruitful discussions. - [ ] depends on: #28125 merge-conflict blocked-by-other-PR t-combinatorics new-contributor 1826/0 Mathlib.lean,Mathlib/Combinatorics/SimplicialComplex/Basic.lean,Mathlib/Combinatorics/SimplicialComplex/Category.lean,Mathlib/Combinatorics/SimplicialComplex/FacePoset.lean,Mathlib/Combinatorics/SimplicialComplex/Hom.lean,Mathlib/Combinatorics/SimplicialComplex/Topology/GeomReal/Basic.lean,Mathlib/Combinatorics/SimplicialComplex/Topology/GeomReal/Colimit.lean,Mathlib/Combinatorics/SimplicialComplex/Topology/GeomReal/Diagram.lean,Mathlib/Combinatorics/SimplicialComplex/Topology/GeomReal/Functor.lean,Mathlib/Combinatorics/SimplicialComplex/Topology/GeomReal/Map.lean,Mathlib/Combinatorics/SimplicialComplex/Topology/Simplex.lean,Mathlib/Combinatorics/SimplicialComplex/Topology/SimplexMap.lean 12 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
148-71967
4 months ago
243-25795
243 days ago
0-591
9 minutes
28871 JaafarTanoukhi
author:JaafarTanoukhi
 feat(Combinatorics/Digraph): Tournaments Define orientations and tournaments. Related to #26771. Co-authored-by: Rida Hamadani --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-combinatorics new-contributor 62/0 Mathlib.lean,Mathlib/Combinatorics/Digraph/Orientation.lean,Mathlib/Combinatorics/Digraph/Tournament.lean 3 6 ['JaafarTanoukhi', 'Rida-Hamadani', 'SnirBroshi', 'github-actions', 'mathlib4-merge-conflict-bot'] kmill
assignee:kmill
148-71828
4 months ago
148-71829
148 days ago
71-37436
71 days
29947 JaafarTanoukhi
author:JaafarTanoukhi
 feat(Combinatorics/Digraph): Maps Ported `SimpleGraph/Maps.lean` to `Digraph/Maps.lean` for future PRs related to issue #[26771](https://github.com/leanprover-community/mathlib4/issues/26771) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-combinatorics new-contributor 476/0 Mathlib.lean,Mathlib/Combinatorics/Digraph/Maps.lean 2 2 ['github-actions', 'mathlib4-merge-conflict-bot'] awainverse
assignee:awainverse
148-71194
4 months ago
148-71195
148 days ago
54-85998
54 days
30230 CoolRmal
author:CoolRmal
 feat(MeasureTheory): Basic properties of the integral against a vector measure with a bilinear form. Create a folder named Integral in the folder about vector measures. Define the integral of a function against a vector measure with a bilinear form, and prove that integral is a linear operator on functions, bilinear forms, and vector measures, respectively. Several useful lemmas are added into the file about variations of a vector measure (e.g. triangle inequality). --- - [ ] depends on: #28499 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR new-contributor t-measure-probability 1353/0 Mathlib.lean,Mathlib/MeasureTheory/VectorMeasure/Basic.lean,Mathlib/MeasureTheory/VectorMeasure/Integral/Basic.lean,Mathlib/MeasureTheory/VectorMeasure/Integral/L1.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Defs.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Lemmas.lean 6 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
148-71025
4 months ago
unknown
0-0
0 seconds
14704 Command-Master
author:Command-Master
 feat(FieldTheory): define typeclass for simple extensions, and prove some properties Define `SimpleExtension F K`, which says that `K` is a simple field extension of `F`, and show that together with transcendentality it implies `IsFractionRing F[X] K`. --- - [x] depends on: #14710 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra new-contributor merge-conflict awaiting-author
label:t-algebra$
 120/0 Mathlib.lean,Mathlib/FieldTheory/SimpleExtension.lean 2 19 ['Command-Master', 'acmepjz', 'github-actions', 'leanprover-community-mathlib4-bot', 'mathlib4-merge-conflict-bot', 'tb65536'] nobody
148-68026
4 months ago
592-61140
592 days ago
48-65595
48 days
11021 jstoobysmith
author:jstoobysmith
 feat(AlgebraicTopology): add join of augmented SSets This pull-request adds the definition of the join of augmented SSets defined as contravariant functors from `WithInitial SimplexCategory` to `Type u`. In addition it shows that the join of two standard augmented SSets is again an augmented SSets. From this the definition of the join of simplicial sets should follow easily. To aid the above theory, an api for `WithInitial SimplexCategory` has been created, with the notion of the `join` and `split` (forming a sort of inverse to join) of objects in this category are defined. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebraic-topology new-contributor 2137/1 .gitignore,Mathlib.lean,Mathlib/AlgebraicTopology/Join.lean,Mathlib/AlgebraicTopology/SimplexCategory.lean,Mathlib/AlgebraicTopology/SimplexCategoryWithInitial.lean,Mathlib/AlgebraicTopology/SimplicialSet.lean 6 47 ['github-actions', 'jcommelin'] nobody
148-45042
4 months ago
778-12487
778 days ago
1-20227
1 day
18626 hannahfechtner
author:hannahfechtner
 feat: define Artin braid groups Define the Artin braid group on infinitely many strands. Includes a toGroup function which defines a function out of the braid group to any other group (given a function which satisfies the braid relations) (more to come in this file; next up: Artin braid groups on finitely many strands) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra new-contributor
label:t-algebra$
 91/0 Mathlib.lean,Mathlib/GroupTheory/SpecificGroups/BraidGroup/Basic.lean 2 22 ['github-actions', 'hannahfechtner', 'jcommelin', 'joelriou'] nobody
148-44889
4 months ago
511-51768
511 days ago
15-38473
15 days
20029 FrederickPu
author:FrederickPu
 feat(Tactic/simps): allow for Config attributes to be set directly Allow for Config attributes to be set directly when using initialize_simp_projection as per issue #19895 Basically modified initialize_simp_projection so that the user has the option of specifying a tuple of config option values. Ex: ``` initialize_simp_projection MulEquiv (toFun → apply, invFun → symm_apply) (fullyApplied := false) ``` These config options are then converted into projections.  --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP new-contributor t-meta 34/4 Mathlib/Tactic/Simps/Basic.lean 1 11 ['FrederickPu', 'YaelDillies', 'fpvandoorn', 'github-actions', 'leanprover-community-bot-assistant'] nobody
148-44826
4 months ago
484-62075
484 days ago
0-34081
9 hours
21269 658060
author:658060
 feat(CategoryTheory/Topos): basic definitions and results in topos theory This code contains basic definitions and results in topos theory, including the definition of a subobject classifier, power objects, and topoi. It is proved that every topos has exponential objects, i.e. "internal homs". The mathematical content follows chapter IV sections 1-2 of Mac Lane and Moerdijk's text "Sheaves in Geometry and Logic". --- - [x] depends on: #21281 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-category-theory new-contributor merge-conflict awaiting-author 1269/0 Mathlib.lean,Mathlib/CategoryTheory/Topos/Basic.lean,Mathlib/CategoryTheory/Topos/Classifier.lean,Mathlib/CategoryTheory/Topos/Exponentials.lean,Mathlib/CategoryTheory/Topos/Power.lean 5 10 ['658060', 'gio256', 'github-actions', 'joelriou', 'mathlib4-dependent-issues-bot'] nobody
148-44799
4 months ago
441-23613
441 days ago
0-13879
3 hours
23990 robertmaxton42
author:robertmaxton42
 feat(Types.Colimits): Quot is functorial and colimitEquivQuot is natural Add `Functor.quotFunctor` to parallel `Functor.sectionsFunctor`, witnessing that `Quot` is functorial; add `colimNatIsoQuotFunctor` to parallel `limNatIsoSectionsFunctor`, witnessing that `colimitEquivQuot` is natural in the diagram $F$. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory new-contributor 33/0 Mathlib/CategoryTheory/Limits/Types/Colimits.lean 1 5 ['github-actions', 'joelriou', 'leanprover-community-bot-assistant', 'robertmaxton42'] nobody
148-44682
4 months ago
360-43617
360 days ago
8-27909
8 days
27991 sinianluoye
author:sinianluoye
 feat(Rat): add Rat.den_eq_of_add_den_eq_one and its dependent lemmas ```lean4 example {q r : ℚ} (h : (q + r).den = 1) : q.den = r.den := by ``` It is so simple, but I couldn't find it in current mathlib repo. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-data new-contributor 22/0 Mathlib/Data/Rat/Lemmas.lean 1 33 ['github-actions', 'kim-em', 'mathlib-bors', 'pechersky', 'sinianluoye', 'themathqueen'] pechersky
assignee:pechersky
148-44365
4 months ago
177-31500
177 days ago
74-62001
74 days
28215 5hv5hvnk
author:5hv5hvnk
 feat: strong and Weak connectivity for Digraphs strong and weak connectivity in Digraphs --- Should resolve a part of issue #26771 Main additions in the PR: 1. Walks in Digraphs (Walk.lean) - Basic walk structure with start and end vertices - Support for walk operations: append, reverse, length - Support functions: getVert, copy, support 2. Walk Decompositions (WalkDecomp.lean) - takeUntil and dropUntil functions to split walks - rotate operation for loop walks - Theorems relating to walk decomposition properties 3. Subgraphs (subgraph.lean) - Subgraph structure for digraphs - Induced and spanning subgraph predicates - Lattice structure (sup, inf, top, bot) - Coercion to standalone digraphs 4. Paths (Paths.lean) - Trail, Path, Circuit, Cycle definitions - Path structure with no repeating vertices - Theorems relating different path types - Basic connectivity definitions (reachable, weakly/strongly connected) 5. Connectivity (Connected.lean) - Reachability relations and properties - Strong and weak connectivity definitions - Connected component types: - StronglyConnectedComponent - WeaklyConnectedComponent - ConnectedComponent - Component properties and equivalence relations --> [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP new-contributor merge-conflict awaiting-author t-combinatorics 1266/0 Mathlib.lean,Mathlib/Combinatorics/Digraph/Connected.lean,Mathlib/Combinatorics/Digraph/Paths.lean,Mathlib/Combinatorics/Digraph/Subgraph.lean,Mathlib/Combinatorics/Digraph/Walk.lean,Mathlib/Combinatorics/Digraph/WalkDecomp.lean 6 4 ['github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] nobody
148-44344
4 months ago
248-83411
248 days ago
0-454
7 minutes
29574 JarodAlper
author:JarodAlper
 feat: regular local rings are domains We have added three new files in Mathlib/RingTheory/LocalRing * EmbeddingDimension.lean * LocalRingDimension.lean * RegularLocalRings.lean We have added two lemmas and an instance in Mathlib/RingTheory/LocalRing/RingHom/Basic.lean This work was done by Jarod Alper and Brian Nugent. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-ring-theory new-contributor 910/3 Mathlib.lean,Mathlib/RingTheory/LocalRing/EmbeddingDimension.lean,Mathlib/RingTheory/LocalRing/LocalRingDimension.lean,Mathlib/RingTheory/LocalRing/RegularLocalRings.lean,Mathlib/RingTheory/LocalRing/RingHom/Basic.lean,lake-manifest.json 6 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
148-44233
4 months ago
215-45303
215 days ago
0-1063
17 minutes
28718 imbrem
author:imbrem
 feat: class for chosen finite coproducts Added basic `ChosenFiniteCoproducts` class, and started porting some of the lemmas about `ChosenFiniteProducts` suitably translated --- This, combined with #20182 modified to use chosen finite coproducts and premonoidal categories (#21488), should be enough for me to formalize strong Elgot categories, and hence a lot of categorical iteration theory for my PhD thesis. Re-done from #21603 to deal with changes in #24399 and #24390 Eventually, if we really want to harmonize approaches, we could introduce an `AddMonoidalCategory` struct and do the analogous to #24399 and #24390 for additive monoidal structure, but that seems like a massive overcomplication for now. It would allow formalizing fun things like rig categories, though. - [ ] depends on: #30150 blocked-by-other-PR t-category-theory new-contributor merge-conflict awaiting-author 290/0 Mathlib.lean,Mathlib/CategoryTheory/ChosenFiniteCoproducts.lean 2 9 ['YaelDillies', 'github-actions', 'imbrem', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'robin-carlier'] nobody
148-44145
4 months ago
239-18648
239 days ago
0-581
9 minutes
26765 KiringYJ
author:KiringYJ
 feat(MeasureTheory/PiSystem): add π-λ theorem and SetLike instance Add two small features to `MeasureTheory/PiSystem`: 1. SetLike instance `instance : SetLike (DynkinSystem α) (Set α)` This lets us write `s ⊆ d` and `t ∈ d` for a DynkinSystem `d`, matching usual mathlib style. 2. `DynkinSystem.pi_lambda` lemma Classical π‑λ theorem: if a π‑system `s` is contained in a Dynkin system `d`, every set measurable for `σ(s)` is also in `d`. Currently, mathlib exposes this result only indirectly (e.g. via `generateFrom_eq`). Although logically equivalent, it is not obvious at first glance that those lemmas are the π‑λ theorem. The new lemma states the result in its familiar textbook form, so users can recognise and cite it immediately. Both pieces are under 10 lines, term‑mode only, and do not modify existing APIs. No breaking changes. No dependencies. awaiting-author t-measure-probability new-contributor 13/0 Mathlib/MeasureTheory/PiSystem.lean 1 14 ['EtienneC30', 'KiringYJ', 'dagurtomas', 'github-actions', 'ocfnash'] RemyDegenne
assignee:RemyDegenne
148-30541
4 months ago
148-30541
148 days ago
138-3922
138 days
30637 strihanje01
author:strihanje01
 feat(Combinatorics/SetFamily/Lindstrom): Lindstrom's theorem for subfamilies with equal unions add Lindstrom's theorem and its strengthening for equal intersections --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor 209/0 Mathlib/Combinatorics/SetFamily/Lindstrom.lean 1 2 ['github-actions', 'mathlib4-merge-conflict-bot'] b-mehta
assignee:b-mehta
145-52690
4 months ago
145-52279
145 days ago
31-49241
31 days
31796 dobronx1325
author:dobronx1325
 feat(Data/Real/EReal): add mul_lt_mul_of_pos_left theorem This PR adds the theorem `EReal.mul_lt_mul_of_pos_left`, which states that for a positive real number `a` and extended reals `b < c`, left multiplication by `a` preserves the strict order: `(a : EReal) * b < (a : EReal) * c`. The theorem complements existing order-preserving properties for addition in `EReal` and extends the algebraic structure for multiplication. The proof uses basic properties of extended reals and order relations. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor 23/0 Mathlib/Data/EReal/Operations.lean 1 4 ['JovanGerb', 'LLaurance', 'dobronx1325', 'github-actions'] nobody
142-332
4 months ago
142-55744
142 days ago
6-25774
6 days
32169 saodimao20
author:saodimao20
 feat: add convolution_comp_add_right This PR adds a lemma `convolution_comp_translation_right` showing that convolution commutes with translation on the right operand. Specifically, it proves that for an additive commutative group $G$, the convolution of a function $f$ with a translated function $x \mapsto g(a + x)$ is equal to the convolution of $f$ and $g$ evaluated at $x + a$. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis new-contributor awaiting-author 14/0 Mathlib/Analysis/Convolution.lean 1 3 ['github-actions', 'urkud'] nobody
139-73112
4 months ago
139-73112
139 days ago
0-82278
22 hours
32126 nielsvoss
author:nielsvoss
 feat(Analysis/Normed/Operator): definition of singular values for linear maps This PR defines a generalization of singular values, the approximation numbers, for continuous linear maps between normed vector spaces. It proves basic lemmas about the approximation numbers and shows that for finite-dimensional vector spaces, the approximation numbers coincide with the standard definition of singular values. See the discussion on Zulip: https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Singular.20Value.20Decomposition/with/558914024 Co-authored-by: Arnav Mehta Co-authored-by: Rawad Kansoh --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-analysis new-contributor 331/0 Mathlib/Analysis/Normed/Operator/SingularValues.lean 1 2 ['github-actions', 'nielsvoss'] nobody
139-24253
4 months ago
unknown
0-0
0 seconds
31898 ntapiam
author:ntapiam
 feat(LinearAlgebra/TensorAlgebra): implement HopfAlgebra for TensorAlgebra implementation of the natural Hopf algebra structure on the TensorAlgebra new-contributor t-ring-theory awaiting-author 253/0 Mathlib.lean,Mathlib/Algebra/FreeAlgebra.lean,Mathlib/LinearAlgebra/TensorAlgebra/Basic.lean,Mathlib/RingTheory/Bialgebra/FreeAlgebra.lean,Mathlib/RingTheory/Bialgebra/TensorAlgebra.lean,Mathlib/RingTheory/HopfAlgebra/TensorAlgebra.lean 6 64 ['YaelDillies', 'github-actions', 'kckennylau', 'ntapiam'] nobody
132-45089
4 months ago
145-11902
145 days ago
0-34649
9 hours
30525 515801431
author:515801431
 feat(Mathlib/Combinatorics/Enumerative/Polya): Add Polya Counting This PR introduces basic definitions and results about colorings under permutation group actions. A coloring is defined as a function X → Y, and the permutation group Equiv.Perm X acts on colorings by precomposition: (g • c) x = c (g⁻¹ • x) This formalizes the natural action of relabeling the elements of X. Main definitions MulAction (Equiv.Perm X) (X → Y): The action of the permutation group on colorings via precomposition. coloringEquiv (c₁ c₂ : X → Y) : Prop: Two colorings are equivalent if they lie in the same orbit under this action, i.e. ∃ f : Equiv.Perm X, f • c₁ = c₂. Main results smul_eq_iff_mem_stabilizer: Characterizes when two group actions on the same coloring are equal, showing that g • c = f • c ↔ f⁻¹ * g ∈ stabilizer c. coloringEquiv_equivalence: Proves that coloringEquiv defines an equivalence relation on X → Y. orbit_size_eq_index: Reformulates the orbit–stabilizer theorem in the context of colorings: |orbit c| = |Perm X| / |stabilizer c| Motivation These results provide foundational infrastructure for studying Burnside’s lemma and Pólya’s enumeration theorem in Mathlib, where the enumeration of distinct colorings up to symmetry plays a central role. t-combinatorics new-contributor awaiting-author merge-conflict 113/0 Mathlib.lean,Mathlib/Combinatorics/Enumerative/Polya.lean 2 8 ['IvanRenison', 'alreadydone', 'github-actions', 'mathlib4-merge-conflict-bot'] awainverse
assignee:awainverse
132-31851
4 months ago
140-75394
140 days ago
39-49182
39 days
31113 515801431
author:515801431
 feat(Mathlib/Combinatorics/Enumerative/Polya.lean): Add additional theorem in `Polya.lean` --- - [ ] depends on: #30525 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor blocked-by-other-PR merge-conflict 302/0 Mathlib.lean,Mathlib/Combinatorics/Enumerative/Polya.lean 2 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] b-mehta
assignee:b-mehta
132-31727
4 months ago
141-54153
141 days ago
16-82714
16 days
24441 MrSumato
author:MrSumato
 feat(Data/List): add Lyndon-Schutzenberger theorem on list commutativity Add Lyndon-Schutzenberger theorem on list commutativity. Included definition for List.repeatSelf that returns list repeated n times. --- This is my first mathlib PR, so any comments are highly appreciated. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-data new-contributor 129/1 Mathlib.lean,Mathlib/Data/List/Commutativity.lean,Mathlib/Data/List/Defs.lean,Mathlib/Data/List/Lemmas.lean 4 38 ['MrSumato', 'github-actions', 'grunweg', 'madvorak', 'mathlib4-merge-conflict-bot', 'plp127'] grunweg
assignee:grunweg
132-27329
4 months ago
314-53673
314 days ago
29-59355
29 days
31147 daefigueroa
author:daefigueroa
 feat(Dynamics): point transitive monoid actions and transitive points We define point transitivity for a monoid action on a topological space and define the set of transitive points. We add some basic lemmas and implications between topological transitivity and point transitivity. --- - [x] depends on: #28001 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-dynamics new-contributor awaiting-author 114/6 Mathlib/Dynamics/Transitive.lean 1 6 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'sgouezel'] sgouezel
assignee:sgouezel
129-52562
4 months ago
129-52562
129 days ago
18-38983
18 days
31987 saodimao20
author:saodimao20
 feat: add monotonicity and relation lemmas for mgf and cgf Add two lemmas about moment-generating and cumulant-generating functions: - `mgf_mono_in_t_of_nonneg`: For nonnegative random variables, the mgf is monotone in the parameter `t` - `cgf_zero_of_mgf_one`: The cgf equals zero iff the mgf equals one These lemmas are useful for studying properties of mgf and cgf in probability theory. Contributed by sequential-intelligence-lab(SIL), University of Virginia --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability new-contributor awaiting-author 21/0 Mathlib/Probability/Moments/Basic.lean 1 5 ['DavidLedvinka', 'github-actions'] RemyDegenne
assignee:RemyDegenne
123-44668
4 months ago
123-44668
123 days ago
21-31799
21 days
32938 0xTerencePrime
author:0xTerencePrime
 feat(Order/LocallyFinite): prove DenselyOrdered and LocallyFiniteOrder are incompatible ## Summary This PR proves that a nontrivial densely ordered linear order cannot be locally finite. ## Main results * `not_locallyFiniteOrder`: A densely ordered locally finite linear order must be subsingleton. * `not_locallyFiniteOrder_of_nontrivial`: The main theorem - incompatibility of the two properties. Note: This implementation imports `Mathlib.Order.Interval.Set.Infinite` to reuse the existing `Set.Icc_infinite` theorem, ensuring standard library consistency. ## Mathematical content The key insight is that in a densely ordered type, we can always find a new element between any two distinct elements. This means any nontrivial interval contains infinitely many elements. However, `LocallyFiniteOrder` requires intervals to be finite. This contradiction implies that such a type cannot exist (unless it is trivial). ## Motivation This resolves a TODO mentioned in #7987 (Data/Finset/LocallyFinite entry). ## Verification - [x] `lake build Mathlib.Order.LocallyFinite.Basic` passes - [x] `lake exe runLinter Mathlib.Order.LocallyFinite.Basic` passes t-order new-contributor awaiting-author 28/0 Mathlib/Order/Interval/Finset/Basic.lean 1 10 ['0xTerencePrime', 'CoolRmal', 'github-actions', 'jcommelin', 'plp127'] nobody
118-68070
3 months ago
118-68110
118 days ago
3-22290
3 days
32698 farruhx
author:farruhx
 feat(List): add aesop / simp annotations to selected lemmas for improved automation This PR adds `@[aesop safe]` and `@[simp]` annotations to a set of List lemmas whose proofs are routine and benefit from standardized automation. No statements or definitions are changed; only proof annotations are added. The lemmas updated in this PR are: * `or_exists_of_exists_mem_cons` * `append_subset_of_subset_of_subset` * `map_subset_iff` * `append_eq_has_append` * `append_right_injective` * `append_left_injective` * `reverse_surjective` * `reverse_bijective` * `mem_getLast?_append_of_mem_getLast?` * `mem_dropLast_of_mem_of_ne_getLast` * `idxOf_eq_length_iff` * `idxOf_append_of_mem` * `length_eraseP_add_one` The goal is to make these commonly used lemmas easier for `aesop`-based automation to resolve, while avoiding any interference with simp-normal-form lemmas or canonical rewrite rules. There are no API changes and no new theorems—only improved automation behavior. t-data new-contributor awaiting-author 18/1 Mathlib/Data/List/Basic.lean 1 8 ['artie2000', 'euprunin', 'farruhx', 'github-actions'] pechersky
assignee:pechersky
118-16439
3 months ago
118-16439
118 days ago
7-31364
7 days
27817 zhuyizheng
author:zhuyizheng
 feat: add IMO2025P1 Add a solution to IMO2025P1, the original problem statement from https://github.com/jsm28/IMOLean --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) IMO awaiting-author new-contributor merge-conflict 1310/0 Archive.lean,Archive/Imo/Imo2025Q1.lean 2 9 ['github-actions', 'kim-em', 'mathlib4-merge-conflict-bot', 'zhuyizheng'] dwrensha
assignee:dwrensha
117-48636
3 months ago
177-13204
177 days ago
54-75088
54 days
26923 oliver-butterley
author:oliver-butterley
 feat(Dynamics/BirkhoffSum): add the pointwise ergodic theorem (Birkhoff's) The Pointwise Ergodic Theorem, also known as Birkhoff's Ergodic Theorem. Co-authored-by: Lua Viana Reis - [x] depends on: #26074 - [x] depends on: #26807 - [x] depends on: #26810 - [x] depends on: #26840 - [x] depends on: #26842 - [x] depends on: #26848 - [x] depends on: #26851 - [x] depends on: #26852 - [x] depends on: #26853 - [x] depends on: #27008 - [x] depends on: #28901 Zulip: [PR thread](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2326923.20The.20pointwise.20ergodic.20theorem.20.28Birkhoff's.29/with/527835158) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-dynamics new-contributor awaiting-author 398/0 Mathlib.lean,Mathlib/Dynamics/BirkhoffSum/Pointwise.lean 2 31 ['D-Thomine', 'github-actions', 'leanprover-community-bot-assistant', 'lua-vr', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'sgouezel', 'urkud'] sgouezel
assignee:sgouezel
115-71059
3 months ago
121-28977
121 days ago
98-51478
98 days
33218 Blackfeather007
author:Blackfeather007
 feat(Algebra): Define the associated graded ring to filtered ring Define the associated graded ring to a filtered ring. --- - [ ] depends on: #33217 migrated from https://github.com/leanprover-community/mathlib4/pull/26858 t-ring-theory new-contributor blocked-by-other-PR 450/0 Mathlib.lean,Mathlib/RingTheory/FilteredAlgebra/AssociatedGraded.lean 2 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
114-81301
3 months ago
115-186
115 days ago
0-132
2 minutes
33219 Blackfeather007
author:Blackfeather007
 feat(Algebra): Define associated graded algebra Define the associated graded algebra of a filtered algebra, constructed from a special case of associated graded ring. --- - [ ] depends on: #33218 migrated from #26859 t-ring-theory new-contributor blocked-by-other-PR 563/0 Mathlib.lean,Mathlib/RingTheory/FilteredAlgebra/AssociatedGraded.lean 2 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
114-81193
3 months ago
114-86360
114 days ago
0-133
2 minutes
33220 Blackfeather007
author:Blackfeather007
 feat(Algebra): Define associated graded module Define the associated graded module to a filtered module. --- - [ ] depends on: #33218 migrated from #26860 t-ring-theory new-contributor blocked-by-other-PR 669/0 Mathlib.lean,Mathlib/RingTheory/FilteredAlgebra/AssociatedGraded.lean 2 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
114-81109
3 months ago
114-86172
114 days ago
0-137
2 minutes
33227 Blackfeather007
author:Blackfeather007
 feat(Algebra): exact of associated graded exact We proved that a chain complex is exact if its associated graded complex is exact. Co-authored-by: Huanyu Zheng @Yu-Misaka [suzuka@misaka-yu.com](mailto:suzuka@misaka-yu.com) Co-authored-by: Yi Yuan @yuanyi-350 [kysyy1@126.com](mailto:kysyy1@126.com) Co-authored-by: Weichen Jiao @AlbertJ-314 [albertjiao314@gmail.com](mailto:albertjiao314@gmail.com) --- - [ ] depends on: #33226 migrated from #26869 t-ring-theory new-contributor blocked-by-other-PR 728/0 Mathlib.lean,Mathlib/RingTheory/FilteredAlgebra/AssociatedGraded.lean,Mathlib/RingTheory/FilteredAlgebra/Exactness.lean,Mathlib/RingTheory/FilteredAlgebra/FilteredHom.lean 4 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
114-78781
3 months ago
114-78782
114 days ago
0-1208
20 minutes
33226 Blackfeather007
author:Blackfeather007
 feat(Algebra): associated graded exact of exact and strict In this file, we define the concept of exhaustive filtrations. We also prove a AssociatedGradedRingHom sequence is exact iff each GradedPieceHom is exact. And when a sequence is strict exact, the corresponding AssociatedGradedRingHom sequence is also exact. Co-authored-by: Huanyu Zheng @Yu-Misaka [suzuka@misaka-yu.com](mailto:suzuka@misaka-yu.com) Co-authored-by: Yi Yuan @yuanyi-350 [kysyy1@126.com](mailto:kysyy1@126.com) Co-authored-by: Weichen Jiao @AlbertJ-314 [albertjiao314@gmail.com](mailto:albertjiao314@gmail.com) --- - [ ] depends on: #33222 migrated from #26868 t-ring-theory new-contributor blocked-by-other-PR 529/0 Mathlib.lean,Mathlib/RingTheory/FilteredAlgebra/AssociatedGraded.lean,Mathlib/RingTheory/FilteredAlgebra/Exactness.lean,Mathlib/RingTheory/FilteredAlgebra/FilteredHom.lean 4 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
114-78779
3 months ago
114-78780
114 days ago
0-1431
23 minutes
33225 Blackfeather007
author:Blackfeather007
 feat(Algebra): filtered module hom In this PR we defined the filtered semi-linear map for filtered module and the associated graded module hom. --- - [ ] depends on: #33220 - [ ] depends on: #33223 migrated from #26867 t-ring-theory new-contributor blocked-by-other-PR 1205/0 Mathlib.lean,Mathlib/RingTheory/FilteredAlgebra/AssociatedGraded.lean,Mathlib/RingTheory/FilteredAlgebra/FilteredHom.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
114-78778
3 months ago
114-78779
114 days ago
0-1805
30 minutes
33224 Blackfeather007
author:Blackfeather007
 feat(Algebra): define filtered alghom In this PR, we define the filtered algebra homomorphisms on algebras and prove some basic properties of them. --- - [ ] depends on: #33219 - [ ] depends on: #33223 migrated from #26863 t-ring-theory new-contributor blocked-by-other-PR 1055/0 Mathlib.lean,Mathlib/RingTheory/FilteredAlgebra/AssociatedGraded.lean,Mathlib/RingTheory/FilteredAlgebra/FilteredHom.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
114-78776
3 months ago
114-78777
114 days ago
0-2046
34 minutes
33223 Blackfeather007
author:Blackfeather007
 feat(Algebra): define filtered ring homomorphism In this PR, we define the filtered ring morphisms on rings and prove some basic properties of them. Co-authored-by: Huanyu Zheng @Yu-Misaka [suzuka@misaka-yu.com](mailto:suzuka@misaka-yu.com) Co-authored-by: Yi Yuan @yuanyi-350 [kysyy1@126.com](mailto:kysyy1@126.com) Co-authored-by: Weichen Jiao @AlbertJ-314 [albertjiao314@gmail.com](mailto:albertjiao314@gmail.com) --- - [ ] depends on: #33218 - [ ] depends on: #33222 migrated from #26862 t-ring-theory new-contributor blocked-by-other-PR 824/0 Mathlib.lean,Mathlib/RingTheory/FilteredAlgebra/AssociatedGraded.lean,Mathlib/RingTheory/FilteredAlgebra/FilteredHom.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
114-78773
3 months ago
114-78776
114 days ago
0-2257
37 minutes
33222 Blackfeather007
author:Blackfeather007
 feat(Algebra): define filtered add group hom In this file we define filtered hom and the corresponding associated graded hom for abelian groups. Co-authored-by: Huanyu Zheng @Yu-Misaka [suzuka@misaka-yu.com](mailto:suzuka@misaka-yu.com) Co-authored-by: Yi Yuan @yuanyi-350 [kysyy1@126.com](mailto:kysyy1@126.com) Co-authored-by: Weichen Jiao @AlbertJ-314 [albertjiao314@gmail.com](mailto:albertjiao314@gmail.com) --- - [ ] depends on: #33217 migrated from #26861 new-contributor t-ring-theory blocked-by-other-PR 368/0 Mathlib.lean,Mathlib/RingTheory/FilteredAlgebra/AssociatedGraded.lean,Mathlib/RingTheory/FilteredAlgebra/FilteredHom.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
114-78772
3 months ago
114-78773
114 days ago
0-2387
39 minutes
33178 gw90
author:gw90
 feat(Analysis/CStarAlgebra/Spectrum): Adding lemmas that the CStarAlgebra norm equals the square root of the spectral radius of star a * a Adds lemmas that the ||a||^2_A=sqrt(spectralRadius C (star a * a)). I think it would be helpful to have these lemmas available in Mathlib. It'll help with some of the other things I'm working on. Feel free to move them to a different file or rename them as you see fit. new-contributor t-analysis awaiting-author 24/0 Mathlib/Analysis/CStarAlgebra/Spectrum.lean 1 15 ['github-actions', 'gw90', 'themathqueen', 'vihdzp'] nobody
114-30640
3 months ago
116-6259
116 days ago
0-15209
4 hours
32264 jjtowery
author:jjtowery
 feat(Bicategory): add lax slice bicategory --- In this PR, I define the lax slice bicategory for a lax functor over an object. I also give the change of slice strict pseudofunctor. These are from Section 7.1 of Johnson & Yau and are essential for their Whitehead theorem for bicategories (lax functor biequivalence iff essentially surjective, essentially full, and fully faithful), which I'd like to prove at some point. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory new-contributor awaiting-author 527/0 Mathlib.lean,Mathlib/CategoryTheory/Bicategory/LaxSlice.lean 2 12 ['dagurtomas', 'github-actions', 'jjtowery', 'robin-carlier'] dagurtomas
assignee:dagurtomas
111-20858
3 months ago
134-24315
134 days ago
3-49892
3 days
32960 dleijnse
author:dleijnse
 feat(FieldTheory): adjoin pth roots For a field `k` of exponential characteristic `p` and a subset `S` of `k`, we define the extension of `k` obtained by adjoining all `p`-th roots of elements of `S`. We prove that this is a purely inseparable extension, and provide some basic API. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor awaiting-author
label:t-algebra$
 131/0 Mathlib.lean,Mathlib/FieldTheory/PurelyInseparable/AdjoinPthRoots.lean 2 13 ['artie2000', 'chrisflav', 'dleijnse', 'erdOne', 'github-actions', 'leanprover-radar'] erdOne
assignee:erdOne
110-37510
3 months ago
110-37510
110 days ago
10-12739
10 days
33163 Aaron1011
author:Aaron1011
 feat: prove subgroup of (M -> Z) is finitely generated --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory new-contributor awaiting-author 5/0 Mathlib/RingTheory/DedekindDomain/Dvr.lean 1 2 ['erdOne', 'github-actions'] alreadydone
assignee:alreadydone
110-30460
3 months ago
110-30460
110 days ago
5-82139
5 days
33133 0xTerencePrime
author:0xTerencePrime
 feat(Algebra/Group/Center): add Decidable (IsMulCentral a) instance This PR adds a `Decidable` instance for `IsMulCentral a`. ### Summary The structure `IsMulCentral` was missing a `Decidable` instance. This PR provides the instance by leveraging `isMulCentral_iff`, enabling decidability for both multiplicative and additive (via `to_additive`) structures. ### Verification - `lake build Mathlib.Algebra.Group.Center` passed. - `lake exe runLinter Mathlib.Algebra.Group.Center` passed. t-algebra new-contributor awaiting-author
label:t-algebra$
 7/0 Mathlib/Algebra/Group/Center.lean 1 3 ['github-actions', 'robin-carlier'] ocfnash
assignee:ocfnash
104-58651
3 months ago
104-58651
104 days ago
12-60805
12 days
33502 MrQubo
author:MrQubo
 fix(Tactic/ProxyType): Pass params explicitly in proxy_equiv% implementation Fix [#mathlib4 > `deriving Fintype` with Prop](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/.60deriving.20Fintype.60.20with.20Prop/with/566118621) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-meta WIP 12/2 Mathlib/Tactic/ProxyType.lean,MathlibTest/DeriveFintype.lean 2 7 ['MrQubo', 'github-actions', 'kmill'] kmill
assignee:kmill
103-25575
3 months ago
103-25576
103 days ago
0-60133
16 hours
17176 arulandu
author:arulandu
 feat: integrals and integrability with .re Lemmas for swapping order of .re and integration/integrability. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author new-contributor t-measure-probability please-adopt 49/0 Mathlib/MeasureTheory/Function/L1Space.lean,Mathlib/MeasureTheory/Integral/IntegrableOn.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral.lean,Mathlib/MeasureTheory/Integral/SetIntegral.lean 4 32 ['EtienneC30', 'arulandu', 'github-actions', 'loefflerd'] nobody
101-28573
3 months ago
548-75810
548 days ago
9-73631
9 days
33756 dleijnse
author:dleijnse
 feat(FieldTheory): root of polynomial with p power coefficients This PR proves the results in https://stacks.math.columbia.edu/tag/031V, which gives a criterion for a root of a polynomial over a field `k` of characteristic `p` to be a `p`-th power. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor
label:t-algebra$
 88/0 Mathlib.lean,Mathlib/FieldTheory/PthPowerCoeffPoly.lean 2 1 ['github-actions'] nobody
98-47073
3 months ago
unknown
0-0
0 seconds
33299 kingiler
author:kingiler
 feat: Add decidable membership for Interval Implemented membership and corresponding decidable instance for `Interval`. Related [#mathlib4 > Proposal: Add decidable membership for Interval](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Proposal.3A.20Add.20decidable.20membership.20for.20Interval/with/565438009). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author new-contributor t-order 16/1 Mathlib/Order/Interval/Basic.lean 1 5 ['Vierkantor', 'eric-wieser', 'github-actions', 'kingiler'] Vierkantor
assignee:Vierkantor
98-38879
3 months ago
98-38879
98 days ago
13-42146
13 days
32880 0xTerencePrime
author:0xTerencePrime
 feat(Analysis/Asymptotics): define subpolynomial growth ## Main definitions * `Asymptotics.IsSubpolynomial l f g`: A function `f` has subpolynomial growth with respect to `g` along filter `l` if `f = O(1 + ‖g‖^k)` for some natural `k`. ## Main results * `IsSubpolynomial.const`: Constant functions have subpolynomial growth * `IsSubpolynomial.id`: Identity has subpolynomial growth * `IsSubpolynomial.add`: Closure under addition * `IsSubpolynomial.neg`: Closure under negation * `IsSubpolynomial.sub`: Closure under subtraction * `IsSubpolynomial.mul`: Closure under multiplication * `IsSubpolynomial.pow`: Closure under powers * `isSubpolynomial_iff_one_add`: Equivalence with `(1 + ‖g‖)^k` formulation * `IsSubpolynomial.uniform`: Uniform bounds for finite families ## Implementation notes The definition uses `1 + ‖g‖^k` rather than `(1 + ‖g‖)^k` as the primary form, with the equivalence established in `isSubpolynomial_iff_one_add`. Four private auxiliary lemmas handle the key inequalities needed for closure proofs. Closes #32658 awaiting-author t-analysis new-contributor 185/0 Mathlib.lean,Mathlib/Analysis/Asymptotics/Subpolynomial.lean 2 28 ['0xTerencePrime', 'ADedecker', 'github-actions', 'j-loreaux'] ADedecker
assignee:ADedecker
94-31647
3 months ago
94-31868
94 days ago
22-22665
22 days
33948 anivegesana
author:anivegesana
 feat(Analysis/Normed/Algebra): matrix exponential of nilpotent matrix Where the matrix exponential and nilpotent elements are defined, both the matrix exponential and the nilpotent element exponential. I had to add a different theorem for normed space exponential and the matrix exponential since the right instances wouldn't be synthesized. Help with golfing would be appreciated. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-analysis 34/0 Mathlib/Analysis/Normed/Algebra/Exponential.lean,Mathlib/Analysis/Normed/Algebra/MatrixExponential.lean 2 1 ['github-actions'] nobody
92-82632
3 months ago
92-79260
92 days ago
0-3444
57 minutes
30391 rudynicolop
author:rudynicolop
 feat(Data/List): list splitting definitions and lemmas This PR continues the work from #24395. Original PR: https://github.com/leanprover-community/mathlib4/pull/24395 t-data new-contributor awaiting-author 108/2 Mathlib/Data/List/Perm/Lattice.lean,Mathlib/Data/List/TakeDrop.lean 2 50 ['BoltonBailey', 'IlPreteRosso', 'TwoFX', 'Vierkantor', 'github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot', 'rudynicolop'] TwoFX
assignee:TwoFX
90-49978
3 months ago
90-58500
90 days ago
93-10641
93 days
29282 Jlh18
author:Jlh18
 feat(CategoryTheory): HasColimits instance on Grpd Show that the category of groupoids has all small colimits, as a coreflective subcategory of `Cat`, which has all small colimits. The right adjoint of the forgetful functor is the core functor `CategoryTheory.Core.functor`. - [ ] depends on: #29283 [Core of a category as a functor] --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR new-contributor t-category-theory 140/4 Mathlib.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/InducedMaps.lean,Mathlib/CategoryTheory/Category/Grpd.lean,Mathlib/CategoryTheory/Core.lean,Mathlib/CategoryTheory/Groupoid/Grpd/Colimit.lean,Mathlib/CategoryTheory/Groupoid/Grpd/Core.lean 6 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
88-60058
2 months ago
226-5442
226 days ago
0-396
6 minutes
33478 anishrajeev
author:anishrajeev
 feat(ModelTheory): define a subset of the topology over complete types Define a subset of the Stone Space over a language expanded with countably many constants. Define the proposition to indicate if a language is countable. The subset's density and openness is a future goal to prove (have a branch where it is almost finished), in pursuit of formalizing the proof of the Omitting Types Theorem via properties of Baire spaces. - [ ] depends on: #32215 - [ ] depends on: #32546 t-logic blocked-by-other-PR merge-conflict new-contributor 160/1 Mathlib.lean,Mathlib/ModelTheory/Topology/Types.lean,Mathlib/ModelTheory/Types.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean 4 8 ['NoneMore', 'anishrajeev', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'tb65536'] nobody
86-39443
2 months ago
94-53267
94 days ago
10-38484
10 days
34141 gululu996-ui
author:gululu996-ui
 feat(Combinatorics/SimpleGraph/Acyclic): finite trees have at least two degree-one vertices Add a lemma showing that a finite tree with at least two vertices has at least two vertices of degree 1. - Introduce a helper lemma `SimpleGraph.Connected.one_le_degree` for connected graphs on a nontrivial finite type. - Prove the leaf-count lower bound via the degree-sum identity and a counting argument. --- awaiting-author new-contributor t-combinatorics 72/2 Mathlib/Combinatorics/SimpleGraph/Acyclic.lean 1 9 ['IvanRenison', 'SnirBroshi', 'github-actions', 'vlad902'] nobody
84-43201
2 months ago
86-24637
86 days ago
1-23617
1 day
34129 idontgetoutmuch
author:idontgetoutmuch
 feat: define Ehresmann connections --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-differential-geometry new-contributor 90/0 Mathlib.lean,Mathlib/Geometry/Manifold/EhresmannConnection.lean 2 5 ['github-actions', 'grunweg', 'idontgetoutmuch', 'metakunt'] nobody
83-64751
2 months ago
87-43637
87 days ago
0-1188
19 minutes
29953 slashbade
author:slashbade
 feat: add reap for experiment --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor 40/3 Cache/IO.lean,Mathlib/Tactic/Common.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean,lake-manifest.json,lakefile.lean 5 3 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
79-35726
2 months ago
unknown
0-0
0 seconds
31377 CoolRmal
author:CoolRmal
 feat: a series of smooth functions that converges (locally) uniformly is smooth The main theorem is the proof that an infinite sum of $C^n$ functions on a one-dimensional domain which converges locally uniformly is $C^n$ and related results. This should be compared with [contDiff_tsum](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Analysis/Calculus/SmoothSeries.html#contDiff_tsum) where the same result is proved for functions on an arbitrary domain but with a slightly stronger convergence assumption. The main motivation for this PR is the [#mathlib4 > Tychonov's Counterexample for the Heat Equation](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Tychonov's.20Counterexample.20for.20the.20Heat.20Equation/with/547367912). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology new-contributor awaiting-author merge-conflict 110/18 Mathlib/Analysis/Calculus/SmoothSeries.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Cotangent.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/QExpansion.lean,Mathlib/Topology/Algebra/InfiniteSum/TsumUniformlyOn.lean,Mathlib/Topology/Algebra/InfiniteSum/UniformOn.lean 5 20 ['CoolRmal', 'github-actions', 'mathlib4-merge-conflict-bot', 'ocfnash', 'sgouezel'] ocfnash
assignee:ocfnash
78-25299
2 months ago
139-42264
139 days ago
8-14810
8 days
33031 chiyunhsu
author:chiyunhsu
 feat(Combinatorics/Enumerative/Partition): add combinatorial proof of Euler's partition theorem The new file EulerComb.lean contains the combinatorial proof of Euler's partition theorem. The analytic proof of the theorem and its generalization of Glaisher's Theorem has already been formalized in [Glaisher.lean](https://github.com/leanprover-community/mathlib4/blob/master/Mathlib/Combinatorics/Enumerative/Partition/Glaisher.lean). The generalization of the combinatorial proof from this file to Glaisher's Theorem is within reach. --- Zulip discussion: [#mathlib4 > Glaisher’s Bijection on integer partitions](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Glaisher.E2.80.99s.20Bijection.20on.20integer.20partitions/with/570808111) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor awaiting-zulip 531/0 Mathlib.lean,Mathlib/Combinatorics/Enumerative/Partition/EulerComb.lean 2 5 ['chiyunhsu', 'github-actions', 'tb65536', 'vihdzp'] b-mehta
assignee:b-mehta
77-48820
2 months ago
77-48820
77 days ago
42-22427
42 days
34130 FlAmmmmING
author:FlAmmmmING
 feat(Combinatorics/SimpleGraph/Acyclic): Add new theorem `isTree_iff_uniqueShortest_path` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-combinatorics new-contributor 28/1 Mathlib/Combinatorics/SimpleGraph/Acyclic.lean 1 9 ['IvanRenison', 'github-actions', 'metakunt', 'vlad902'] nobody
76-71227
2 months ago
85-55242
85 days ago
2-6824
2 days
32609 PrParadoxy
author:PrParadoxy
 feat(LinearAlgebra/PiTensorProduct): Relation between nested tensor products and tensor products indexed by dependent sums Product tensors in `⨂ j : (Σ i, β i), s j.fst j.snd` can be mapped to product tensors in `⨂ i, ⨂ b : β i, s i b`. If the outer index type is finite, the two types are equivalent. This allows the definition of endomorphisms on PiTensorProducts by specifying them on disjoint subsets of the index set. Such constructions are common e.g. in quantum circuits, quantum cellular automata, and renormalization procedures. --- WIP. This PR contains two "requests for comments". Essentially: * Is a single complex-to-define linear equivalence preferable over several less complex ones, which might however be of limited interest by themselves? * Which trade-offs are appropriate to make things computable? - [ ] depends on: #32608 - [x] depends on: #32600 - [x] depends on: #32598 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor blocked-by-other-PR merge-conflict t-algebra
label:t-algebra$
 683/0 Mathlib.lean,Mathlib/Data/Sigma/Basic.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/PiTensorProduct/Nested.lean,Mathlib/LinearAlgebra/PiTensorProduct/Set.lean 5 5 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
75-22632
2 months ago
129-23070
129 days ago
0-2004
33 minutes
30260 imbrem
author:imbrem
 feat(CategoryTheory/Monoidal): added CocartesianMonoidalCategory As discussed in #21603 and #28718; this implements chosen finite coproducts on top of `AddMonoidalCategory` as defined in #30150 --- - [ ] depends on: #30150 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR large-import new-contributor t-category-theory 839/125 Mathlib.lean,Mathlib/CategoryTheory/Monoidal/Category.lean,Mathlib/CategoryTheory/Monoidal/Cocartesian/Basic.lean,Mathlib/CategoryTheory/Monoidal/Discrete.lean,Mathlib/Tactic/ToAdditive/GuessName.lean 5 4 ['github-actions', 'imbrem', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
74-61463
2 months ago
193-12032
193 days ago
0-1234
20 minutes
30258 imbrem
author:imbrem
 feat(CategoryTheory/Monoidal): to_additive for proofs using `monoidal` Building on #30150, this allows us to use `@[to_additive]` on proofs containing `monoidal`, by tagging the lemmas `monoidal` outputs with `@[to_additive]` as appropriate. Testing on my branch [`additive-monoidal-coherence`](https://github.com/imbrem/mathlib4/tree/additive-monoidal-coherence) shows that this works. It is still future work to have either the `monoidal` tactic or a new `add_monoidal` tactic work for `AddMonoidalCategory` instances directly. --- - [ ] depends on: #30150 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR large-import new-contributor t-category-theory 524/140 Mathlib/CategoryTheory/Monoidal/Category.lean,Mathlib/CategoryTheory/Monoidal/Discrete.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Normalize.lean,Mathlib/Tactic/CategoryTheory/Monoidal/PureCoherence.lean,Mathlib/Tactic/CategoryTheory/MonoidalComp.lean,Mathlib/Tactic/ToAdditive/GuessName.lean 6 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
74-61456
2 months ago
193-17685
193 days ago
0-241
4 minutes
32742 LTolDe
author:LTolDe
 feat(MeasureTheory/Constructions/Polish/Basic): add class SuslinSpace add new class `SuslinSpace` for a topological space that is an analytic set in itself This will be useful to prove the **Effros Theorem**, see [zulip thread](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Effros.20Theorem/with/558712441). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor awaiting-zulip t-measure-probability 4/0 Mathlib/MeasureTheory/Constructions/Polish/Basic.lean 1 9 ['ADedecker', 'LTolDe', 'dupuisf', 'github-actions', 'jcommelin'] PatrickMassot
assignee:PatrickMassot
74-61230
2 months ago
100-45362
100 days ago
11-7507
11 days
30121 idontgetoutmuch
author:idontgetoutmuch
 feat(Mathlib/Geometry/Manifold): principal fiber bundle core A structure capturing what it means to be a principal fibre bundle. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-differential-geometry new-contributor 227/0 Mathlib.lean,Mathlib/Geometry/Manifold/PrincipalFiberBundle/PrincipalGBundle.lean 2 8 ['github-actions', 'grunweg', 'idontgetoutmuch', 'mathlib4-merge-conflict-bot'] hrmacbeth
assignee:hrmacbeth
74-53171
2 months ago
171-44617
171 days ago
25-16284
25 days
31102 JOSHCLUNE
author:JOSHCLUNE
 feat: require LeanHammer Experimenting with adding LeanHammer as a mathlib dependency --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict new-contributor t-meta 61/4 Mathlib/Tactic/Common.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean,MathlibTest/Hammer.lean,lake-manifest.json,lakefile.lean 5 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
74-51938
2 months ago
150-8741
150 days ago
0-150
2 minutes
33431 gululu996-ui
author:gululu996-ui
 feat(Combinatorics/SimpleGraph/Bipartite): characterize bipartite simple graphs by even cycles Add the classical characterization of bipartite simple graphs: a simple graph is bipartite if and only if every cycle has even length. Previously, mathlib has the definition of `IsBipartite` for `SimpleGraph` and various lemmas about bipartite graphs, but it does not provide this equivalence in a single theorem, so users have to reprove or reassemble it from existing results. Prove the forward direction by showing a 2-coloring alternates along any walk, so every cycle must have even length. Prove the converse by showing that if an odd cycle exists then no bipartition is possible, hence if all cycles are even the graph admits a bipartition. new-contributor t-combinatorics awaiting-author 186/1 Mathlib/Combinatorics/SimpleGraph/Bipartite.lean 1 5 ['NickAdfor', 'github-actions', 'jcommelin'] kmill
assignee:kmill
74-51670
2 months ago
76-52567
76 days ago
26-1427
26 days
34291 YellPika
author:YellPika
 feat(Data): a monad for partial computations This is the code corresponding to [mathlib4 > A monad for partial computations](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/A.20monad.20for.20partial.20computations/with/569619800). Not currently intended to be merged. This PR depends on #33941. The only changes relevant to this discussion are in `OmegaPart.lean`, `OmegaProp.lean`, and `Quot.lean`. # Original Message Inspired by @**Aaron Liu**'s comments in #**mathlib4>deprecate Mathlib.Data.Nat.PartENat?@538009243** and #**Is there code for X?>Divergence monad@538020049** I made an attempt at constructing a monad for partial computations with a computable `OmegaCompletePartialOrder` instance (neither `Option` nor `Part` support this use case). My solution consists of three parts. **A computable version of `Quotient.choice`.** As mentioned in #**lean4>Quot.lift for dependent products@467436416** , the "obvious" computational interpretation of `Quotient.choice : (∀i:I, @Quotient (A i) …) → @Quotient (∀i:I, A i)` is not sound. However, we _can_ provide a sound computational interpretation when we restrict `I` to `ℕ`: ```lean unsafe def Quotient.countableChoice_impl {α : Nat → Type*} {S : ∀ i, Setoid (α i)} (f : ∀ i, Quotient (S i)) : @Quotient (∀ i, α i) (by infer_instance) := Quotient.lift₂ (fun z s ↦ ⟦fun | .zero => z | .succ n => s n⟧) (fun z₁ s₁ z₂ s₂ h₁ h₂ ↦ by apply sound rintro ⟨_|n⟩ · apply h₁ · apply h₂) (f 0) (countableChoice_impl (fun n ↦ f n.succ)) @[implemented_by Quotient.countableChoice_impl] def Quotient.countableChoice {α : Nat → Type*} {S : ∀ i, Setoid (α i)} (f : ∀ i, Quotient (S i)) : @Quotient (∀ i, α i) (by infer_instance) := Quotient.choice f ``` My justification for the soundness of this implementation comes from the fact that only uses existing (sound and computable) functions + general recursion. The implementation is found [here](https://github.com/YellPika/mathlib4/blob/99d38f164a97c7aa225283ef6016f0279419a994/Mathlib/Data/Quot.lean#L430) (it uses `unquot` instead of recursion for performance reasons, but should be equivalent). **A type of semi-computable propositions.** Next, I define a type of semi-computable propositions `ΩProp` as a quotient of the type of boolean sequences `(ℕ → Bool) / ≈`, where `p ≈ q ≝ (∃n, p n) ↔ (∃n, q n)`. A sequence is interpreted as "true" if at least one element in the sequence is `true`, and the quotient relation ensures that we cannot observe the difference between different "true" sequences. The `ΩProp` type has a (computable) `OmegaCompletePartialOrder`, and `Quotient.countableChoice` is used in the implementation of `ωSup`. The implementation of this type is [here](https://github.com/YellPika/mathlib4/blob/quot-choice-compute/Mathlib/Data/OmegaProp.lean). **A type of semi-computable computations.** Finally, I define the type `ΩPart A` of semi-computable computations returning a value of type `A`. The definition of `ΩPart` is the same as `Part` with `ΩProp` swapped for `Prop`. Again, `ΩPart A` has a (computable) `OmegaCompletePartialOrder` instance. The implementation can be found [here](https://github.com/YellPika/mathlib4/blob/quot-choice-compute/Mathlib/Data/OmegaPart.lean). This was mainly just a fun experiment and the code is not ready to be (or perhaps should not be) put in mathlib. I thought I should post it here to see if 1) there is any interest or 2) an implementation already exists that has escaped my notice. new-contributor large-import merge-conflict 1157/40 Mathlib/Data/OmegaPart.lean,Mathlib/Data/OmegaProp.lean,Mathlib/Data/Quot.lean,Mathlib/Order/OmegaCompletePartialOrder.lean,Mathlib/Order/ScottContinuity.lean 5 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
72-30191
2 months ago
unknown
0-0
0 seconds
34053 christian-oudard
author:christian-oudard
 feat: Add error function (erf) and complementary error function (erfc) ## Summary I was doing some finance math and needed the Error Function, so I thought I'd contribute it. ### Main definitions * `Real.erf`: The error function, defined as `(2/√π) ∫₀ˣ e^(-t²) dt` * `Real.erfc`: The complementary error function, defined as `1 - erf x` ### Main results * `Real.erf_zero`: `erf 0 = 0` * `Real.erf_neg`: `erf` is an odd function: `erf (-x) = -erf x` * `Real.erf_tendsto_one`: `erf x → 1` as `x → ∞` * `Real.erf_tendsto_neg_one`: `erf x → -1` as `x → -∞` * `Real.erf_le_one`: `erf x ≤ 1` for all `x` * `Real.neg_one_le_erf`: `-1 ≤ erf x` for all `x` * `Real.deriv_erf`: `deriv erf x = (2/√π) * exp(-x²)` * `Real.differentiable_erf`: `erf` is differentiable * `Real.continuous_erf`: `erf` is continuous * `Real.strictMono_erf`: `erf` is strictly monotone Also adds `erf` to `docs/overview.yaml` under Special Functions. --- - [x] Builds successfully - [x] `lake exe runLinter` passes - [x] `lake exe mk_all --check` passes t-analysis new-contributor awaiting-author 333/0 Mathlib.lean,Mathlib/Analysis/SpecialFunctions/Erf.lean,docs/overview.yaml 3 18 ['SnirBroshi', 'christian-oudard', 'github-actions', 'j-loreaux', 'plp127'] j-loreaux
assignee:j-loreaux
72-2967
2 months ago
72-39820
72 days ago
14-69133
14 days
33601 nielstron
author:nielstron
 feat(Computability/ContextFreeGrammar): Concatenation of CFGs is CFG --- - [ ] depends on: #33599 - [ ] depends on: #33592 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability new-contributor blocked-by-other-PR 941/0 Mathlib/Computability/ContextFreeGrammar.lean 1 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
71-67080
2 months ago
101-50943
101 days ago
0-412
6 minutes
34726 GrigorenkoPV
author:GrigorenkoPV
 feat(Analysis/SpecialFunctions/Trigonometric/Basic): sin and cos of multiples of π / 3 --- Merge of https://github.com/leanprover-community/mathlib4/pull/26349 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor 159/0 Mathlib/Algebra/Order/Monoid/NatCast.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Basic.lean,Mathlib/Data/Nat/Cast/Defs.lean,MathlibTest/trigonometry.lean 4 1 ['github-actions'] nobody
70-26105
2 months ago
73-44245
73 days ago
0-2854
47 minutes
34394 Citronhat
author:Citronhat
 feat(Algebra/Order/Ring): add constructors for linear ordered rings Add constructors for ordered rings from `mul_nonneg` / `mul_pos` that derive `ZeroLEOneClass` from a linear order. new-contributor t-algebra awaiting-author
label:t-algebra$
 31/14 Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/RingTheory/HahnSeries/Lex.lean 2 6 ['Citronhat', 'Vierkantor', 'github-actions', 'leanprover-radar'] Vierkantor
assignee:Vierkantor
69-59442
2 months ago
69-59442
69 days ago
12-25418
12 days
33493 michelsol
author:michelsol
 feat(RingTheory/Polynomial): An explicit formula for the Chebyshev polynomials of the first kind Adds the following explicit formula on the Chebyshev polynomial of the first kind of order n. ${ T_{n}(x)\ =\ \sum \limits _{k=0}^{\lfloor {\frac {n}{2}}\rfloor } {\binom {n}{2k}} \left(\ X^{2}-1\ \right)^{k}\ X^{n-2k}}$ This explicit formula can be found [here](https://en.wikipedia.org/wiki/Chebyshev_polynomials#Explicit_expressions). There is a proof using complex numbers but it only works if the ring R = ℂ. The proof here is by induction and works in a commutative ring R. Mathlib seems to extend the definition of Chebyshev polynomials for $n \in \mathbb{Z}$ but this would make the formula more cumbersome with `n.natAbs` in place of `n`'s, so I expressed it on `n : ℕ` directly. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory new-contributor awaiting-author 51/1 Mathlib/RingTheory/Polynomial/Chebyshev.lean 1 8 ['YuvalFilmus', 'erdOne', 'github-actions', 'metakunt', 'michelsol'] chrisflav
assignee:chrisflav
68-9281
2 months ago
68-9281
68 days ago
35-16104
35 days
26986 WangYiran01
author:WangYiran01
 feat(Partition): add bijection for partitions with max part ≤ r This PR adds a new theorem `partition_max_equals_bound` to `Mathlib.Combinatorics.Enumerative.Partition`. It constructs a bijection between: - The set of partitions of `n` in which `r ∈ π.parts` and all parts are `≤ r`, and - The set of partitions of `n - r` whose largest part is at most `r`. This provides a constructive proof via removing/adding `r` from/to the partition multiset, in line with classical enumerative combinatorics. Contributed by Yiran Wang. awaiting-author t-combinatorics new-contributor merge-conflict 92/0 Mathlib/Combinatorics/Enumerative/Partition/Basic.lean,Mathlib/Data/Multiset/Lattice.lean 2 20 ['WangYiran01', 'github-actions', 'jcommelin', 'kckennylau', 'kim-em', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] b-mehta
assignee:b-mehta
65-44155
2 months ago
98-67023
98 days ago
120-67067
120 days
26168 oliver-butterley
author:oliver-butterley
 feat(MeasureTheory.VectorMeasure): variation defined as a supremum is equal to variation defined using the Hahn-Jordan decomposition Add `signedMeasure_totalVariation_eq`: if `μ` is a `SignedMeasure` then variation defined as a supremum is equal to variation defined using the Hahn-Jordan decomposition. Co-authored-by: @yoh-tanimoto - [ ] depends on: #26165 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR new-contributor t-measure-probability merge-conflict 916/0 Mathlib.lean,Mathlib/MeasureTheory/VectorMeasure/Integral.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Defs.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Equiv.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Lemmas.lean 5 4 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
65-25144
2 months ago
285-67411
285 days ago
15-65390
15 days
33969 goliath-klein
author:goliath-klein
 refactor(PiTensorProduct/{InjectiveNorm, ProjectiveNorm}): Currently, injectiveSeminorm = projectiveSeminorm **WIP / RFC!** Arguably, `injectiveSeminorm` should be re-defined in Mathlib. See #34137 and [Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/injectiveSeminorm/with/568798261) for context. In this file, we collect some results about the current definition and a possible alternative. Contents: * A theorem `injectiveSeminorm_eq_projectiveSeminorm` formalizing the equality of the current definitions. However, I think it is unlikely that keeping the alternative characterization would be worth the effort. The interesting direction `(L2') ≤ (L1)` follows from `norm_eval_le_projectiveSeminorm` which is still present. The converse direction is [somewhat tautological](https://github.com/leanprover-community/mathlib4/pull/34137). A proof of `(L2) = (L1)` (probably requiring Hahn-Banach) might be more interesting. * A preliminary implementation of the injective seminorm as commonly understood. * Sufficient conditions for the multiplicativity property `‖⨂ m i‖_∧ = ∏ ‖m i‖` to hold. This implements a TBD item. --- Co-authored-by: Davood H. H. Tehrani [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-analysis new-contributor large-import merge-conflict 774/387 Mathlib.lean,Mathlib/Analysis/Normed/Module/Dual.lean,Mathlib/Analysis/Normed/Module/HahnBanach.lean,Mathlib/Analysis/Normed/Module/PiTensorProduct/InjectiveSeminorm.lean,Mathlib/Analysis/Normed/Module/PiTensorProduct/LeastReasonable.lean,Mathlib/Analysis/Normed/Module/PiTensorProduct/ProjectiveSeminorm.lean,Mathlib/Analysis/Normed/Operator/Basic.lean,Mathlib/LinearAlgebra/PiTensorProduct.lean 8 3 ['github-actions', 'goliath-klein', 'mathlib-merge-conflicts'] nobody
64-27505
2 months ago
92-42609
92 days ago
0-23
23 seconds
33233 jazzits
author:jazzits
 feat(GroupTheory): add chosen group presentations and Tietze transformations (1) and (2) Defines a notion of group presentation for G compatible with Mathlib.GroupTheory.PresentedGroup: generators `ι → G` whose range generates G, and relators `rels : Set (FreeGroup ι)` whose normal closure equals the kernel of `FreeGroup ι →* G`. Provides the canonical map `PresentedGroup P.rels →* G` and equivalences showing `PresentedGroup P.rels ≃* G` and invariance under changing presentations. Also formalizes Tietze moves (1)–(2) as equivalences of PresentedGroups: adding/removing a relator that lies in the normal closure of the others. TODO: moves (3)–(4) (add/remove generator with a defining relation). No existing definitions are modified t-group-theory new-contributor awaiting-author 328/0 Mathlib.lean,Mathlib/GroupTheory/Presentation.lean 2 15 ['github-actions', 'homeowmorphism', 'jazzits', 'kbuzzard', 'mathlib-merge-conflicts', 'plp127', 'tb65536'] tb65536
assignee:tb65536
63-56038
2 months ago
108-48585
108 days ago
5-47362
5 days
34725 GrigorenkoPV
author:GrigorenkoPV
 feat(RingTheory/RootsOfUnity/LowDegree): quadratic, cubic, quartic, quintic roots of unity Closes https://github.com/leanprover-community/mathlib4/pull/25907 --- Merge of https://github.com/leanprover-community/mathlib4/pull/25907 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-ring-theory awaiting-author 247/0 Mathlib.lean,Mathlib/Algebra/CharP/Invertible.lean,Mathlib/Algebra/QuadraticDiscriminant.lean,Mathlib/RingTheory/RootsOfUnity/LowDegree.lean 4 22 ['GrigorenkoPV', 'LLaurance', 'erdOne', 'github-actions', 'joneugster'] nobody
63-20728
2 months ago
68-10048
68 days ago
5-38408
5 days
34159 wangying11123
author:wangying11123
 feat(Geometry/Euclidean/Similarity): Add Triangle similarity on oangle Add theorems about triangles similarity on oangle t-euclidean-geometry new-contributor awaiting-author 154/1 Mathlib/Geometry/Euclidean/Similarity.lean 1 8 ['LLaurance', 'github-actions', 'jsm28', 'wangying11123'] jsm28
assignee:jsm28
62-54805
2 months ago
63-15634
63 days ago
7-49555
7 days
33050 mkaratarakis
author:mkaratarakis
 feat: lemmas for the analytic part of the proof of the Gelfond–Schneider theorem Lemmas missing for the formalisation of the proof of the Gelfond–Schneider theorem --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory new-contributor WIP 238/0 Mathlib.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/Analytic/Order.lean,Mathlib/Analysis/Complex/CauchyIntegral.lean,Mathlib/NumberTheory/Transcendental/AnalyticPart.lean,Mathlib/NumberTheory/Transcendental/AnalyticPart2.lean 6 113 ['SnirBroshi', 'github-actions', 'j-loreaux', 'mkaratarakis', 'riccardobrasca', 'vihdzp'] riccardobrasca
assignee:riccardobrasca
61-37185
2 months ago
71-56442
71 days ago
6-49759
6 days
23791 SEU-Prime
author:SEU-Prime
 Create AmiceTrans.lean --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-number-theory new-contributor 2963/0 Mathlib.lean,Mathlib/Analysis/Normed/Ring/Lemmas2.lean,Mathlib/NumberTheory/Padics/AmiceTrans.lean,Mathlib/NumberTheory/Padics/PSAC.lean,Mathlib/NumberTheory/Padics/PSAC2.lean,Mathlib/NumberTheory/Padics/PSAC3.lean,Mathlib/NumberTheory/Padics/PiGammainPS.lean,Mathlib/NumberTheory/Padics/PsiandVar.lean,Mathlib/RingTheory/AdicCompletion/Lemma.lean,Mathlib/RingTheory/PowerSeries/Comp.lean,Mathlib/Topology/ContinuousMap/ZeroAtBot.lean 11 5 ['SEU-Prime', 'github-actions', 'leanprover-community-bot-assistant', 'urkud'] nobody
61-9469
2 months ago
374-42135
374 days ago
0-38
38 seconds
33281 michelsol
author:michelsol
 feat(Analysis/SpecialFunctions/Integrals): integral of 1/sqrt(1-x^2) and its integrability. Add the integral of the derivative of arcsin and its integrability. --- - [ ] depends on: #33280 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor merge-conflict t-analysis 59/0 Mathlib/Analysis/SpecialFunctions/Integrability/Basic.lean,Mathlib/Analysis/SpecialFunctions/Integrals/Basic.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/FundThmCalculus.lean 3 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot'] nobody
60-65492
2 months ago
112-33317
112 days ago
0-2872
47 minutes
29777 yuanyi-350
author:yuanyi-350
 feat(Functional Analysis): closed Range Theorem - [ ] depends on: #29151 [Corollary of Hahn-Banach theorem] - [ ] depends on: #29776 [refactor ContinuousLinearMap.isOpenMap by separating it into sublemmas] --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP blocked-by-other-PR new-contributor awaiting-author t-analysis merge-conflict 237/25 Mathlib/Analysis/LocallyConvex/Separation.lean,Mathlib/Analysis/Normed/Operator/Banach.lean,Mathlib/Analysis/Normed/Operator/ClosedRange.lean,Mathlib/Analysis/RCLike/Lemmas.lean,Mathlib/Topology/Order/OrderClosed.lean 5 5 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] faenuccio
assignee:faenuccio
60-34677
2 months ago
210-46453
210 days ago
0-634
10 minutes
29151 yuanyi-350
author:yuanyi-350
 feat: Corollary of Hahn–Banach theorem In this PR, I have proved [Rudin, *Functional Analysis* (Theorem 3.7)][rudin1991] which is a step in proving the Closed Range Theorem. Also, I have added tags for the corresponding theorems in Rudin to mathlib. 3.7 Theorem. Suppose B is a convex, balanced, closed set in a locally convex space $X, x_0 \in X$, but $x_0 \notin B$. Then there exists $\Lambda \in X^*$ such that $|\Lambda x| \leq 1$ for all $x \in B$, but $\Lambda x_0>1$ proof. Since $B$ is closed and convex, we can apply (b) of Theorem 3.4, with $A=\{ x_0 \}$ , to obtain $\Lambda_1 \in X^*$ such that $\Lambda_1 x_0=r e^{i \theta}$ lies outside the closure $K$ of $\Lambda_1(B)$. Since $B$ is balanced, so is $K$. Hence there exists $s, 0 List.Vector.* - ... Deletions: - Nat.bit1_add_bit1 - ... Any other comments you want to keep out of the PR commit should go below the `---`, and placed outside this HTML comment, or else they will be invisible to reviewers. If this PR depends on other PRs, please list them below this comment, using the following format: - [ ] depends on: #xyz [optional extra text] --> [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author new-contributor large-import t-analysis merge-conflict 70/1 Mathlib/Analysis/LocallyConvex/Separation.lean,Mathlib/Analysis/RCLike/Lemmas.lean,Mathlib/Topology/Order/OrderClosed.lean 3 17 ['faenuccio', 'fpvandoorn', 'github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'mcdoll', 'themathqueen', 'yuanyi-350'] faenuccio
assignee:faenuccio
60-30300
2 months ago
207-64128
207 days ago
20-70133
20 days
33712 wangying11123
author:wangying11123
 feat(Geometry/Euclidean/Angle/Unoriented/Projection): Add sameray_orthogonalProjection_vsub_of_angle_lt Add sameray_orthogonalProjection_vsub_of_angle_lt `sameray_orthogonalProjection_vsub_of_angle_lt` When an angle is acute, the vector to the orthogonal projection lies in the same ray as the given direction vector. new-contributor t-euclidean-geometry awaiting-author 20/0 Mathlib/Geometry/Euclidean/Angle/Unoriented/Projection.lean 1 4 ['JovanGerb', 'github-actions', 'j-loreaux'] JovanGerb
assignee:JovanGerb
58-45422
1 month ago
58-45522
58 days ago
39-79348
39 days
33786 hdmkindom
author:hdmkindom
 feat(Analysis/Matrix): add Jacobian matrix for matrix-valued functions This PR introduces the Jacobian matrix for matrix-valued functions `F : Matrix m n ℝ → Matrix p q ℝ`. The Jacobian matrix `jacobianMatrix F X` at point `X` is indexed by `(p × q) × (m × n)`, where each entry represents the partial derivative with respect to a basis element. To handle instance-mismatch issues with matrix norms, we use local Frobenius norm instances. mkdir Analysis/Matrix/Jacobian.lean ## Main definitions - `jacobianMatrix F X`: The Jacobian matrix at point `X`, defined by `jacobianMatrix F X (i, k) (j, l) = (fderiv ℝ F X (Matrix.single j l 1)) i k` ## Main theorems - `fderiv_eq_jacobian_mul`: Express the Fréchet derivative as a contraction with the Jacobian - `jacobianMatrix_comp`: Chain rule for Jacobian matrices - `jacobianMatrix_linear`, `jacobianMatrix_id`, `jacobianMatrix_const`: Basic properties - `jacobianMatrix_add`, `jacobianMatrix_smul`: Linearity properties t-analysis new-contributor awaiting-author 219/0 Mathlib.lean,Mathlib/Analysis/Matrix/Jacobian.lean 2 11 ['erdOne', 'github-actions', 'jcommelin'] sgouezel
assignee:sgouezel
58-45070
1 month ago
58-45824
58 days ago
39-33072
39 days
30667 FrederickPu
author:FrederickPu
 feat(‎Mathlib/Algebra/Group/Subgroup/Pointwise): subgroup mul Title: feat: pointwise products for subgroups Description: showed the point-wise product of disjoint subgroups is equivalent to their Cartesian product. Based on https://leanprover.zulipchat.com/#narrow/channel/113488-general/topic/useful.20group.20theory.20lemmas/with/546738566. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor
label:t-algebra$
 28/0 Mathlib/Algebra/Group/Subgroup/Pointwise.lean 1 23 ['FrederickPu', 'eric-wieser', 'github-actions', 'plp127', 'tb65536'] nobody
58-43931
1 month ago
58-45129
58 days ago
1-24662
1 day
33793 LTolDe
author:LTolDe
 feat(MeasureTheory/Constructions/Polish/Basic): add lemma AnalyticSet.inter_nonempty_of_nowhereMeagre add lemma AnalyticSet.inter_nonempty_of_nowhereMeagre, the main ingredient for the proof of the **Effros' Theorem**, see [#mathlib4 > Effros Theorem](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Effros.20Theorem/with/566543328) introduce definition of a nowhere meagre set --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability new-contributor awaiting-author 37/0 Mathlib/MeasureTheory/Constructions/Polish/Basic.lean,Mathlib/Order/Filter/Basic.lean,Mathlib/Topology/GDelta/Basic.lean 3 8 ['MichaelStollBayreuth', 'erdOne', 'github-actions', 'j-loreaux'] kex-y
assignee:kex-y
58-39688
1 month ago
58-39894
58 days ago
39-9588
39 days
35313 LexinonCraft
author:LexinonCraft
 feat: IMO 2025 Q4 This adds a solution for problem 4 from the International Math Olympiad 2025. --- IMO new-contributor awaiting-author 631/0 Archive.lean,Archive/Imo/Imo2025Q4.lean 2 4 ['LexinonCraft', 'github-actions', 'jsm28'] jsm28
assignee:jsm28
58-9562
1 month ago
58-9562
58 days ago
3-30421
3 days
33276 NicolaBernini
author:NicolaBernini
 feat: Rename List.reverse_perm to List.reverse_perm_self and List.reverse_perm' to List.reverse_perm_iff --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor awaiting-author t-data merge-conflict 17/15 Mathlib/Algebra/BigOperators/Group/List/Basic.lean,Mathlib/Data/Finset/Dedup.lean,Mathlib/Data/List/Basic.lean,Mathlib/Data/List/Defs.lean,Mathlib/Data/List/Perm/Lattice.lean,Mathlib/Data/List/Permutation.lean,Mathlib/Data/Multiset/Defs.lean,Mathlib/NumberTheory/Divisors.lean 8 5 ['Ruben-VandeVelde', 'github-actions', 'mathlib-merge-conflicts'] kim-em
assignee:kim-em
57-79706
1 month ago
108-57979
108 days ago
4-4467
4 days
34674 Citronhat
author:Citronhat
 feat(Algebra/Order/Ring): replace ENNReal lemmas with WithTop versions * Add `WithTop` versions of basic multiplicative order lemmas. * Use the new `WithTop` lemmas to replace `ENNReal` proofs and address six TODOs. * Fix a typo in the `pos_of_ne_zero` alias name. new-contributor t-algebra merge-conflict
label:t-algebra$
 46/15 Mathlib/Algebra/Order/Monoid/Canonical/Defs.lean,Mathlib/Algebra/Order/Ring/WithTop.lean,Mathlib/Data/ENNReal/Operations.lean 3 5 ['Citronhat', 'Ruben-VandeVelde', 'github-actions', 'mathlib-merge-conflicts'] Ruben-VandeVelde
assignee:Ruben-VandeVelde
57-59440
1 month ago
57-59441
57 days ago
17-1225
17 days
28246 Sebi-Kumar
author:Sebi-Kumar
 feat(AlgebraicTopology/FundamentalGroupoid): the n-sphere is simply connected for n > 1 Prove that the `n`-dimensional sphere (i.e., the unit sphere centered at the origin in `(n + 1)`-dimensional real Euclidean space) is a simply connected space for `n > 1`. This proof follows Hatcher's "Algebraic Topology"; we first prove a general lemma about decomposing loops and then exploit the fact that non-surjective loops in the sphere are homotopically trivial. Note: To get this file to build, I edited `Mathlib/Tactic/Linter/DirectoryDependency.lean` to remove the restrictions on AlgebraicTopology files importing Geometry, NumberTheory, and FieldTheory files. Thank you to those who shared their expertise [here](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Warning.20that.20AlgebraicTopology.20can't.20import.20SetTheory/with/533833638). As I understand it, this is just a short-term solution, so I would appreciate feedback on what to do about this situation. Note: I am unsure where exactly the file `SimplyConnectedSphere.lean` should go or whether that is an appropriate name for the file, so feedback there would be appreciated. --- To provide additional context, this code was written as a part of the Fields Undergraduate Summer Research Program at the University of Western Ontario under the supervision of Chris Kapulkin and Daniel Carranza. - [x] depends on: #28208 - [x] depends on: #28198 - [x] depends on: #28185 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology new-contributor awaiting-author 343/3 Mathlib.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/SimplyConnectedSphere.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean 3 17 ['dagurtomas', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'robin-carlier'] robin-carlier
assignee:robin-carlier
55-57226
1 month ago
55-57226
55 days ago
13-78266
13 days
35620 inaciovasquez2020
author:inaciovasquez2020
 feat(Fintype): choose element from nonempty finite type This PR adds a noncomputable choice function for finite types with nonzero cardinality. * `Fintype.chooseOfCardNeZero` provides a witness of `α` from `[Fintype α]` assuming `Fintype.card α ≠ 0`. * A regression test is included in `MathlibTest/Fintype/ChooseOfCardNeZero.lean`. The construction follows existing mathlib choice patterns and is explicitly marked `noncomputable`. t-data new-contributor 21/0 Mathlib.lean,Mathlib/Data/Fintype/Choose.lean,MathlibTest/Fintype/ChooseOfCardNeZero.lean 3 4 ['github-actions', 'plp127', 'vihdzp'] nobody
53-80362
1 month ago
54-10270
54 days ago
0-448
7 minutes
33746 ster-oc
author:ster-oc
 feat(Algebra/Module/ZLattice): align `ZSpan.floor` to `Int.floor` API This PR adds some of the existent lemmas about `Int.floor`, `Int.ceil` and `Int.fract` to the `ZSpan` namespace. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor merge-conflict
label:t-algebra$
 353/145 Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Topology/Algebra/Order/Floor.lean 3 8 ['github-actions', 'joelriou', 'mathlib-merge-conflicts', 'ster-oc'] joelriou
assignee:joelriou
52-76338
1 month ago
52-76338
52 days ago
30-23357
30 days
31766 SuccessMoses
author:SuccessMoses
 feat(Topology/EMetricSpace): continuity of arc length fixes half of #31751 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-topology awaiting-author merge-conflict 396/0 Mathlib.lean,Mathlib/Topology/EMetricSpace/ArcLength.lean,Mathlib/Topology/EMetricSpace/BoundedVariation.lean 3 40 ['SnirBroshi', 'SuccessMoses', 'alreadydone', 'github-actions', 'grunweg', 'j-loreaux', 'mathlib-merge-conflicts'] nobody
52-21635
1 month ago
128-22505
128 days ago
2-78371
2 days
26479 thefundamentaltheor3m
author:thefundamentaltheor3m
 feat(Analysis/Complex/CauchyIntegral): Cauchy–Goursat for Unbounded Rectangles In this PR, we prove versions of the Cauchy-Goursat theorem where the contours in question are rectangular and unbounded (ie, where the contours look like the $\bigsqcup$ symbol). I am not sure if I have formalised these in the best way, or if `Analysis.Complex.CauchyIntegral` is the best place for them (it might be prudent to reorganise the file into multiple files at some point), but I believe this is a useful result. Suggestions welcome. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-analysis sphere-packing awaiting-author 205/0 Mathlib/Analysis/Complex/CauchyIntegral.lean 1 6 ['github-actions', 'j-loreaux', 'loefflerd', 'mathlib4-merge-conflict-bot', 'thefundamentaltheor3m', 'wwylele'] urkud
assignee:urkud
51-21755
1 month ago
51-21755
51 days ago
34-11222
34 days
33247 sun123zxy
author:sun123zxy
 feat(Mathlib/RingTheory/Ideal/Cotangent): dimension of cotangent spaces It is shown that the span rank of the maximal ideal of a local ring equals the dimension of the cotangent space if the maximal ideal is finitely generated. To avoid unnecessary imports, the original `Mathlib/RingTheory/Nakayama` is now moved to `Mathlib/RingTheory/Nakayama/Basic`. --- - [ ] depends on: #33359 - [ ] depends on: #33361 - [ ] depends on: #35651 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed new-contributor t-ring-theory WIP blocked-by-other-PR merge-conflict 140/27 Mathlib.lean,Mathlib/RingTheory/Ideal/Cotangent.lean,Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/LocalRing/Module.lean,Mathlib/RingTheory/LocalRing/Quotient.lean,Mathlib/RingTheory/Nakayama/Basic.lean,Mathlib/RingTheory/Nakayama/SpanRank.lean,Mathlib/RingTheory/Regular/RegularSequence.lean,Mathlib/RingTheory/Support.lean 10 13 ['erdOne', 'github-actions', 'mathlib-bors', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'sun123zxy'] nobody
51-17971
1 month ago
110-25119
110 days ago
3-73599
3 days
35735 mkaratarakis
author:mkaratarakis
 feat(NumberTheory): analytical properties and lower bounds for Gelfond-Schneider auxiliary function This PR is the third component in the formalization of the Gelfond-Schneider Theorem (Hilbert's Seventh Problem). It connects the algebraically constructed auxiliary function `R(x)` to its analytical properties, establishing the exact order of vanishing and the fundamental lower bound on the norm of its non-zero derivative evaluation. Following the argument in Loo-Keng Hua's *Introduction to Number Theory* (Chapter 17.9, equations (4) and (5)), we define the minimal non-vanishing derivative order $r$ and scale the evaluation to an algebraic integer to compute its norm. 1. (`iteratedkDeriv_R_eq_zero` & `order_geq_n`): We verify that the coefficient vector $\eta$ (chosen via Siegel's lemma in the previous PR) forces the first $n$ derivatives of the auxiliary function $R(x)$ to vanish at the points $x \in \{1, 2, \dots, m\}$. Consequently, the analytical order of $R(x)$ at these points is at least $n$. 2. We extract $r$, the exact minimal order of vanishing of $R(x)$ among all points $1 \le l \le m$, and prove that $n \le r$. 3. We define the non-zero algebraic number $\rho = (\log \alpha)^{-r} R^{(r)}(l_0)$. 4. We prove the crucial textbook step that scaling $\rho$ by $c_1^{r+2mq}$ (formalized here as `cρ`) results in an algebraic integer in $\mathcal{O}_K$. 5. Because $c_1^{r+2mq} \rho$ is a non-zero algebraic integer, the absolute value of its norm is at least $1$. We use this to formally prove the strict lower bound on the absolute norm of the unscaled $\rho$: $|N(\rho)| > c_1^{-h(r+2mq)} > c_5^{-r}$. --- - [ ] depends on: #35734 [optional extra text] [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory new-contributor blocked-by-other-PR 1141/0 Mathlib.lean,Mathlib/NumberTheory/Transcendental/GelfondSchneider/MainAlg.lean,Mathlib/NumberTheory/Transcendental/GelfondSchneider/MainAlgSetup.lean,Mathlib/NumberTheory/Transcendental/GelfondSchneider/MainOrder.lean 4 3 ['github-actions', 'mathlib-dependent-issues'] nobody
51-5052
1 month ago
51-27389
51 days ago
0-479
7 minutes
20238 maemre
author:maemre
 feat(Computability/DFA): Closure of regular languages under some set operations This shows that regular languages are closed under complement and intersection by constructing DFAs for them. --- Closure under all other operations will be proved when someone adds the proof for DFA<->regular expression equivalence, so they are not part of this PR. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-computability merge-conflict awaiting-author awaiting-zulip 159/0 Mathlib/Computability/DFA.lean,Mathlib/Computability/Language.lean 2 60 ['EtienneC30', 'YaelDillies', 'github-actions', 'maemre', 'mathlib4-merge-conflict-bot', 'meithecatte', 'urkud'] nobody
49-66376
1 month ago
395-44315
395 days ago
48-67492
48 days
22361 rudynicolop
author:rudynicolop
 feat(Computability/NFA): nfa closure properties Add the closure properties union, intersection and reversal for NFA. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-computability merge-conflict awaiting-author awaiting-zulip 218/2 Mathlib/Computability/Language.lean,Mathlib/Computability/NFA.lean 2 91 ['EtienneC30', 'b-mehta', 'ctchou', 'github-actions', 'leanprover-community-bot-assistant', 'meithecatte', 'rudynicolop'] nobody
49-66360
1 month ago
346-48254
346 days ago
39-61332
39 days
35746 ThomasMoulin-hub
author:ThomasMoulin-hub
 feat (Algebra/Endomorphisms): add kernels lemma from the missing undergraduate mathematics in mathlib Add helper theorem inside Mathlib.Algebra.Polynomial.Smeval.lean and created a new file Mathlib/RingTheory/Polynomial/KernelDecomposition.lean that implements the kernels lemma from the missing undergraduate mathematics in mathlib list. This file also contains intermediate results needed for the main lemma. new-contributor 75/0 Mathlib/Algebra/Polynomial/Smeval.lean,Mathlib/RingTheory/Polynomial/Basic.lean 2 2 ['github-actions'] nobody
49-17800
1 month ago
unknown
0-0
0 seconds
23929 meithecatte
author:meithecatte
 feat(Computability/NFA): improve bound on pumping lemma --- - [x] depends on: #25321 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability awaiting-zulip new-contributor awaiting-author 101/10 Mathlib/Computability/EpsilonNFA.lean,Mathlib/Computability/NFA.lean 2 42 ['YaelDillies', 'dagurtomas', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'meithecatte'] nobody
48-86389
1 month ago
313-29288
313 days ago
34-10092
34 days
35128 DAE123456
author:DAE123456
 feat : Define anti_pascal --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor awaiting-author
label:t-algebra$
 81/0 Archive.lean,Archive/Imo/Imo2018Q3.lean 2 5 ['DAE123456', 'github-actions', 'grunweg', 'vihdzp'] nobody
48-83915
1 month ago
64-53161
64 days ago
0-531
8 minutes
8102 miguelmarco
author:miguelmarco
 feat(Tactic): add `unify_denoms` and `collect_signs` tactics This PR adds four new tactics: - `unify_denoms` tries to put expressions with several divisions in a form with only one division. In the case of fields, it works similarly to `field_simp`, but if the hypothesis about denominators being nonzero are not present, it assumes them, and leaves them as new goals to prove. In that sense, it is an "unsafe" tactic (but can be useful nevertheless, for example when you can't find which exact hypothesis is missing). It also works with expressions of naturals and Euclidean domains, assuming the corresponding hypothesis about the denominators dividing the numerators. - `unify_denoms!` extends `unify_denoms` to work with (in)equalities, assuming also that the denominators, once in normal form, are positive. - `collect_signs` works similarly with expressions using sums and substractions: it tries to put them in a form of one sum minus other sum. In the case of working with naturals, it assumes that we never substract a bigger number from a smaller one. Both are implemented essentially as a macro that combines several rewriting rules. Some new lemmas with the corresponding rules are added. --- please-adopt new-contributor merge-conflict modifies-tactic-syntax good first issue t-meta 407/0 Mathlib.lean,Mathlib/Algebra/EuclideanDomain/Basic.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CollectSigns.lean,Mathlib/Tactic/UnifyDenoms.lean,MathlibTest/unify_denoms.lean,scripts/noshake.json 7 55 ['Paul-Lez', 'YaelDillies', 'github-actions', 'joneugster', 'kbuzzard', 'mathlib4-merge-conflict-bot', 'miguelmarco'] nobody
48-50687
1 month ago
337-33159
337 days ago
17-16443
17 days
35603 2500223210-max
author:2500223210-max
 feat(GroupTheory/Frattini): add more theorems Add some contents about frattini subgroup into Mathlib GroupTheory Frattini.lean,including * (convenient lemma)A subgroup contained in all maximal subgroup is contained in the FRattini subgroup * A subgroup (say H) has a proper complement (meaning for some proper subgroup K, K and H generate the whole group)if and only if it is not contained in the Frattini subgroup. * A group is cyclic iff its Frattini factor(the quotient group wrt Frattini subgroup) is cyclic. * The Frattini factor of a finite p-group is elementary abelian(that is,an abelian group G with Gᵖ={1}) * A finite p-group has trivial Frattini subgroup iff the group is elementary abelian. * Burnside theorem of Frattini factor of finite p-group. --- new-contributor t-group-theory large-import awaiting-author 764/1 Mathlib/GroupTheory/Frattini.lean 1 3 ['github-actions', 'tb65536'] nobody
48-48368
1 month ago
54-35741
54 days ago
0-103
1 minute
33791 PhoenixIra
author:PhoenixIra
 feat: Generalization of FixedPointApproximants to CompletePartialOrder --- This PR provides a generalization of FixedPointApproximants to CompletePartialOrder. Not every theorem can be generalized, as sometimes we require additional conditions (namely `x ≤ f x`) in order to guarantee that the set is directed and thus the supremum is well-defined. This is not necessary in a CompleteLattice. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-order merge-conflict 223/100 Mathlib/Order/CompletePartialOrder.lean,Mathlib/SetTheory/Ordinal/FixedPointApproximants.lean 2 21 ['PhoenixIra', 'github-actions', 'mathlib-merge-conflicts', 'vihdzp'] PhoenixIra and vihdzp
assignee:PhoenixIra assignee:vihdzp
48-26672
1 month ago
48-26672
48 days ago
38-12430
38 days
35734 mkaratarakis
author:mkaratarakis
 feat(NumberTheory): matrix bounds and Siegel's lemma application for Gelfond-Schneider This PR is the second component in the formalization of the Gelfond-Schneider Theorem (Hilbert's Seventh Problem), establishing the transcendence of $\alpha^\beta$. Building on the algebraic setup from the previous PR #35733, this file establishes analytical bounds on the linear system matrix and applies Siegel's Lemma (Lemma 8.2) to extract a bounded, non-trivial integer solution vector. We establish the exact upper bounds required to construct the auxiliary integer function $R(x)$. `c₃` and Matrix Bounds (`house_matrixA_le`)**: We define the bounding constant $c_3$, which aggregates the base bounds $c_2$ and the maximal houses of the algebraic preimages $\alpha', \beta', \gamma'$. Through extensive algebraic manipulation, we formally prove that the house of the entries in our linear system matrix $A$ is strictly bounded by $c_3^n * n^{(n - 1) / 2}$. Using the bounds established above, we apply `house.exists_ne_zero_int_vec_house_le` (a formalization of Lemma 8.2, p. 490) to guarantee the existence of a non-trivial vector of algebraic integers $\eta$ in the kernel of $A$. We define the solution bounding constant $c_4$ and prove the textbook bound that the house of our resulting coefficient vector $\eta$ satisfies $\forall k, \|\eta_k\| \leq c_4^n * n^{(n + 1) / 2}$. - [ ] depends on: #35733 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-number-theory blocked-by-other-PR 872/5 Mathlib.lean,Mathlib/NumberTheory/NumberField/House.lean,Mathlib/NumberTheory/Transcendental/GelfondSchneider/MainAlg.lean,Mathlib/NumberTheory/Transcendental/GelfondSchneider/MainAlgSetup.lean 4 3 ['github-actions', 'mathlib-dependent-issues'] nobody
46-53878
1 month ago
51-28093
51 days ago
0-306
5 minutes
26013 tsuki8
author:tsuki8
 feat(Data/Finset/Card,Data/Set/Finite/Basic): TODO needs a better title add `card_bijOn` and `finset_subset_preimage_of_finite_image` Add `card_bijOn`: proves that for a bijection between finsets, their cardinalities are equal Add `finset_subset_preimage_of_finite_image`: constructs a finset subset preserving image cardinality Co-authored-by: Junyu Guo --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-data new-contributor 15/0 Mathlib/Data/Finset/Card.lean,Mathlib/Data/Set/Finite/Basic.lean 2 6 ['Ruben-VandeVelde', 'github-actions', 'mathlib-merge-conflicts'] nobody
46-1683
1 month ago
289-67816
289 days ago
13-85893
13 days
35442 dhyan-aranha
author:dhyan-aranha
 feat: Affine line with doubled origin counter example --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor awaiting-author t-algebraic-geometry 305/0 Counterexamples.lean,Counterexamples/AffineLineWithDoubledOrigin.lean,Mathlib/AlgebraicGeometry/Limits.lean,Mathlib/Topology/Category/TopCat/Limits/Pullbacks.lean 4 21 ['BryceT233', 'chrisflav', 'dhyan-aranha', 'github-actions'] nobody
45-61013
1 month ago
58-49018
58 days ago
0-3706
1 hour
28286 bwangpj
author:bwangpj
 feat(Geometry/Manifold/ContMDiff): basic lemmas for analytic (`C^ω`) functions Add basic lemmas relating `ContMDiff` in the `C^ω` case to being `Analytic` on charts. This is upstreamed from [https://github.com/girving/ray](https://github.com/girving/ray). Co-authored-by: Geoffrey Irving --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-differential-geometry new-contributor 36/0 Mathlib/Geometry/Manifold/ContMDiff/Defs.lean 1 14 ['bwangpj', 'girving', 'github-actions', 'grunweg', 'kbuzzard', 'mathlib-merge-conflicts', 'sgouezel'] sgouezel
assignee:sgouezel
44-73551
1 month ago
219-69901
219 days ago
27-52841
27 days
34940 michaellee94
author:michaellee94
 feat: the graph of a continuous function on a $C^n$ manifold is a $C^n$ manifold --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry new-contributor awaiting-author 536/0 Mathlib.lean,Mathlib/Geometry/Manifold/ChartedSpace.lean,Mathlib/Geometry/Manifold/Instances/Graph.lean,Mathlib/Geometry/Manifold/IsManifold/Basic.lean,Mathlib/Topology/Constructions/Graph.lean 5 79 ['botbaki-review', 'github-actions', 'grunweg', 'michaellee94', 'ocfnash'] ocfnash
assignee:ocfnash
42-43811
1 month ago
44-23724
44 days ago
15-3412
15 days
35332 yisiox
author:yisiox
 feat(Computability): regular expressions match a regular language This PR adds a proof that the language matched by a regular expression is a regular language. This is achieved by the following constructions and proofs of their correctness - A DFA `epsilon` which accepts the empty language - A DFA `char (a : α)` which accepts the language containing only a single symbol - An Epsilon-NFA `concat (M₁ : εNFA α σ₁) (M₂ : εNFA α σ₂)` which accepts the concatenation of the languages of two Epsilon-NFAs - An Epsilon-NFA `kstar (M : εNFA α σ)` which accepts the Kleene star of a language of an Epsilon-NFA The following theorems on closure are added - `IsRegular.zero` - `IsRegular.one` - `IsRegular.top` - `IsRegular.singleton` - `IsRegular.mul` - `IsRegular.kstar` which demonstrates - `IsRegular.matches` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability new-contributor 475/0 Mathlib/Computability/DFA.lean,Mathlib/Computability/EpsilonNFA.lean 2 2 ['github-actions'] nobody
42-32918
1 month ago
unknown
0-0
0 seconds
14313 grhkm21
author:grhkm21
 feat(RepresentationTheory/FdRep): FdRep is a full subcategory of Rep ``` /-- Equivalence between `FDRep` and the full subcategory of finite dimensional `Rep`. -/ def equivFiniteDimensional : FDRep k G ≌ FullSubcategory (fun V : Rep k G ↦ FiniteDimensional k V) ``` merge-conflict t-algebra t-category-theory new-contributor
label:t-algebra$
 47/8 Mathlib/RepresentationTheory/FDRep.lean 1 21 ['fpvandoorn', 'github-actions', 'grhkm21', 'joelriou', 'kim-em', 'mathlib-bors'] nobody
41-56377
1 month ago
634-22401
634 days ago
4-83177
4 days
33592 nielstron
author:nielstron
 feat(Computability/ContextFreeGrammar): mapping between two types of nonterminal symbols This PR picks up https://github.com/leanprover-community/mathlib4/pull/15895 and resolves the failing lemma by redefining Good symbols. --- I checked that https://github.com/leanprover-community/mathlib4/pull/13514 builds correctly when based on this build. PR for that is #33599 This is my first contribution please let me know of any changes I should outline. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-computability new-contributor 160/0 Mathlib/Computability/ContextFreeGrammar.lean 1 34 ['YaelDillies', 'github-actions', 'madvorak', 'nielstron'] nobody
41-45345
1 month ago
90-73872
90 days ago
10-68503
10 days
35144 daniel-carranza
author:daniel-carranza
 feat(CategoryTheory/Enriched): tensor product of enriched categories For a braided monoidal category `V`, defines the tensor product of `V`-categories `C` and `D`, and shows that the type of `V`-functors out of the tensor product `C \times D` is equivalent to the type of "enriched bifunctors" `EnrichedBifunctor V C D`. --- This work originates from infinity-cosmos project, where it is used to formalize the notion of cotensors in an enriched category. There are some additional coherence lemmas in a braided monoidal category which have been added. Currently, line 209 violates the style guideline that terminal simp calls should not be squeezed. When I tried to replace this with a single `simp`, I get an error message: `maximum recursion depth has been reached`. Any suggestions (either with this or anything else) are greatly appreciated - thank you! [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-category-theory infinity-cosmos awaiting-author 333/0 Mathlib.lean,Mathlib/CategoryTheory/Enriched/TensorProductCategory.lean,Mathlib/CategoryTheory/Monoidal/Braided/Basic.lean 3 12 ['daniel-carranza', 'emilyriehl', 'github-actions', 'joelriou', 'robin-carlier'] nobody
41-41052
1 month ago
64-28246
64 days ago
0-1418
23 minutes
35436 daniel-carranza
author:daniel-carranza
 feat(CategoryTheory/Monoidal/Closed): Prove the isomorphism of internal hom objects C(x \otimes y, z) and C(y, C(x, z)) Prove the currying-uncurrying isomorphism `C(x \otimes y, z) \iso C(y, C(x, z))` between internal hom objects of a closed monoidal category `C`. --- This result is connected to the infinity-cosmos project, and is used to prove that a closed monoidal category enriched in itself admits all cotensors. ~Line 81 currently contains a one-line proof in tactics mode `exact rfl`. When trying to use `rfl` outside of tactics mode, an error is thrown~ (Fixed, thank you @robin-carlier!). Any help with this (or any other aspect of the formalization) is greatly appreciated! [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-category-theory infinity-cosmos delegated 89/0 Mathlib.lean,Mathlib/CategoryTheory/Monoidal/Closed/InternalCurrying.lean 2 15 ['dagurtomas', 'daniel-carranza', 'github-actions', 'joelriou', 'mathlib-bors', 'riccardobrasca', 'robin-carlier'] adamtopaz
assignee:adamtopaz
41-32491
1 month ago
49-20630
49 days ago
7-67484
7 days
35504 JoaBjo
author:JoaBjo
 feat(Probability/Distributions/Exponential): add MGF, moments, and memoryless property feat(Probability/Distributions/Exponential): add MGF, moments, and memoryless property Add the main analytic results for the exponential distribution: - moment-generating function `mgf id (expMeasure r) t = r / (r - t)` for `t < r` - mean `∫ x, x ∂(expMeasure r) = r⁻¹` - variance `Var[id; expMeasure r] = r⁻¹ ^ 2` - `ℒp` membership for all `p` - tail probability `P(X > x) = exp (-(r * x))` - memoryless property `P(X > s + t | X > s) = P(X > t)` The MGF is computed by reducing to the known improper integral `∫ exp(c * x)` on `Ioi`, and integrability is deduced by contradiction from the positive closed-form value. The mean and variance are computed via the Gamma function integral `∫₀^∞ x^(n-1) exp(-r x) dx = Γ(n) / rⁿ`. The memoryless property follows from the exponential identity `exp(-(r(s+t))) = exp(-rt) * exp(-rs)`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-measure-probability 200/0 Mathlib/Probability/Distributions/Exponential.lean 1 6 ['JoaBjo', 'Timeroot', 'github-actions'] kex-y
assignee:kex-y
41-32455
1 month ago
41-32429
41 days ago
15-85459
15 days
27226 xcloudyunx
author:xcloudyunx
 feat(Combinatorics/SimpleGraph): Add Subgraph.inclusion_edge_apply_coe and inclusion_edgeSet_apply_coe This PR continues the work from #25248. Original PR: https://github.com/leanprover-community/mathlib4/pull/25248 awaiting-author t-combinatorics new-contributor merge-conflict 14/0 Mathlib/Combinatorics/SimpleGraph/Subgraph.lean 1 4 ['b-mehta', 'github-actions', 'mathlib-merge-conflicts', 'xcloudyunx'] b-mehta
assignee:b-mehta
41-32445
1 month ago
248-12591
248 days ago
25-83942
25 days
33688 Citronhat
author:Citronhat
 feat(PMF): add expectation lemmas for Poisson PMF This PR adds some basic results about the Poisson distribution, its `PMF`, and its expectation. **New lemmas:** * `poissonPMF_apply` — an unfolding lemma for `poissonPMF`. * `poissonPMFReal_mul_eq_succ_mul` — the standard recursion identity for the Poisson mass function. * `poissonPMFReal_hasSum_nmul` — shows that `fun n ↦ poissonPMFReal r n * n` has sum `r`. * `poissonPMF_tsum_nmul` — the corresponding identity at the level of the `PMF`. * `poissonPMF_coe_tsum_nmul` — the same result after coercion to `ℝ`. Both `ℝ`-valued and `ℝ≥0∞`-valued formulations are included so that these results can be used conveniently in both Lebesgue and Bochner integration contexts. new-contributor t-measure-probability awaiting-author merge-conflict 21/0 Mathlib/Probability/Distributions/Poisson.lean 1 11 ['Citronhat', 'DavidLedvinka', 'github-actions', 'mathlib-merge-conflicts', 'urkud'] urkud
assignee:urkud
41-14425
1 month ago
52-29074
52 days ago
47-76964
47 days
34005 MSpill
author:MSpill
 feat: inverse function theorem for manifolds (concrete version) Proves the inverse function theorem for manifolds: given manifolds $M, N$ and a $C^n$ map $f : M \to N$ whose differential is a linear isomorphism at $p \in M$, then $f$ is a local diffeomorphism at $p$, provided that both $p$ and its image are interior points. The proof proceeds in 4 main steps: 1. Define composition of partial diffeomorphisms 2. Show that the extended chart at an interior point can be restricted to an open set on which it is a partial diffeomorphism, viewing the model vector space as a manifold modelled on itself trivially 3. Use the inverse function theorem (applied to $f$ written in coordinates) to obtain a partial diffeomorphism between model vector spaces 4. Compose with chart diffeomorphisms to obtain a partial diffeomorphism between the manifolds. ------ [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-differential-geometry new-contributor merge-conflict 232/3 Mathlib/Geometry/Manifold/LocalDiffeomorph.lean 1 12 ['MSpill', 'github-actions', 'grunweg', 'mathlib-merge-conflicts'] grunweg
assignee:grunweg
41-14180
1 month ago
91-39693
91 days ago
0-1082
18 minutes
34830 parabamoghv
author:parabamoghv
 feat(CategoryTheory/Monoidal): add definition of categorical groups This PR defines of categorical groups, also known as coherent 2-groups, in mathlib. Motivation: Categorical groups are well-studied structures in monoidal category theory, but are not currently available in mathlib. The definitions in this PR follow the existing design patterns used for Category, MonoidalCategory, and BraidedCategory. This PR focuses on setting up the core structure and notation. Basic lemmas and further developments will be provided in a subsequent PR. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory new-contributor WIP merge-conflict 163/0 Mathlib.lean,Mathlib/CategoryTheory/Monoidal/CategoricalGroups/Basic.lean 2 27 ['dagurtomas', 'github-actions', 'mathlib-merge-conflicts', 'parabamoghv', 'robin-carlier'] robin-carlier
assignee:robin-carlier
41-2900
1 month ago
55-71340
55 days ago
5-13145
5 days
36326 Arnav-panjla
author:Arnav-panjla
 Feat/gaussian schwartz map feat(Analysis/SpecialFunctions/Gaussian): define the Gaussian as a Schwartz function in 1D Define the Gaussian function `x ↦ exp (-x^2)` as a `SchwartzMap` in the one-dimensional case. The proof establishes the Schwartz decay conditions by showing that polynomially weighted expressions of the form `(1 + x^2)^m * exp (-x^2)` are bounded. This allows the Gaussian to be packaged using the `SchwartzMap` API. During the implementation a few adjustments were required to match the current Mathlib API. In particular: * replace the non-existent `IsBigO.mul_right` with `IsBigO.of_bound` applied to the full product `(1 + x^2)^m * exp (-x^2)` * fix `mem_cocompact` usage by replacing `(hh_tendsto.eventually ...).mem_cocompact` with `mem_cocompact.mp (hh_tendsto ...)` * adjust the `hb_bound` step using `gcongr` with exact bounds so that both goals close * remove the unused declaration `hf_nonpos` * register the required import in `Mathlib.lean` This implements the one-dimensional case mentioned in the issue. The generalization to Gaussians associated with arbitrary positive-definite bilinear forms can be added in a follow-up PR. Closes #33072 t-analysis new-contributor 235/0 Mathlib.lean,Mathlib/Analysis/SpecialFunctions/Gaussian/SchwartzMap.lean 2 3 ['github-actions'] nobody
40-33553
1 month ago
40-36868
40 days ago
0-96
1 minute
35684 spitters
author:spitters
 feat(CategoryTheory/MarkovCategory): Kleisli PMF is a Markov category Add `Mathlib/CategoryTheory/MarkovCategory/KleisliPMF.lean` showing that `KleisliCat PMF` is a `MarkovCategory`. Uses `Prod` as tensor and `PUnit` as unit; reuses Mathlib's existing `KleisliCat`, `LawfulMonad PMF`, and `MarkovCategory` infrastructure. Builds the full instance stack: MonoidalCategory → BraidedCategory → SymmetricCategory → CopyDiscardCategory → MarkovCategory --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory new-contributor awaiting-author merge-conflict 323/1 Mathlib.lean,Mathlib/CategoryTheory/MarkovCategory/KleisliPMF.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean 3 6 ['dagurtomas', 'github-actions', 'mathlib-merge-conflicts', 'spitters'] nobody
36-78581
1 month ago
49-24426
49 days ago
2-47211
2 days
36503 Mrigna01
author:Mrigna01
 Add false theorem test file --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor 135/0 Mathlib/FalseBench/FalseTheorems.lean 1 3 ['github-actions'] nobody
36-15463
1 month ago
36-15189
36 days ago
0-364
6 minutes
14603 awueth
author:awueth
 feat: degree is invariant under graph isomorphism --- Mathlib has the definition `SimpleGraph.Iso.mapNeighborSet` which is an equivalence between neighbor sets induced by an isomorphism. Would it be beneficial to add the same equivalence for `neighborFinset`? [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-combinatorics new-contributor 24/0 Mathlib/Combinatorics/SimpleGraph/Map/Finite.lean 1 12 ['SnirBroshi', 'awueth', 'github-actions', 'jcommelin', 'kim-em', 'urkud'] nobody
35-83261
1 month ago
612-43700
612 days ago
31-44440
31 days
33599 nielstron
author:nielstron
 feat(Computability/ContextFreeGrammar): closure under union --- This PR picks up https://github.com/leanprover-community/mathlib4/pull/13514 and resolves the outstanding errors. - [ ] depends on: #33592 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-computability new-contributor 498/0 Mathlib/Computability/ContextFreeGrammar.lean 1 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
35-66698
1 month ago
90-75557
90 days ago
10-65787
10 days
9605 davikrehalt
author:davikrehalt
 feat(Data/Finset & List): Add Lemmas for Sorting and Filtering This PR includes several useful lemmas to the Data/Finset and Data/List modules in Lean's mathlib: 1. `toFinset_filter` (List): Shows that filtering commutes with toFinset. 2. `toFinset_is_singleton_implies_replicate` (List): Shows a list with a singleton toFinset is a List.replicate. 3. `filter_sort_commute` (Finset): Sorting and filtering can be interchanged in Finsets. 4. `Sorted.filter` (List): A sorted list stays sorted after filtering. 5. `Sorted.append_largest` (List): Appending the largest element keeps a list sorted. 6. `sort_monotone_map` (Finset): Relates sorting of a Finset after mapping to sorting of a list. 7. `sort_insert_largest` (Finset): Sorting a Finset with an inserted largest element. 8. `sort_range` (Finset): Sorting a range in a Finset equals the corresponding range list. 9. ~~`filter_eval_true` (List): Filtering a list with a predicate always true keeps the list unchanged.~~ 10. ~~`filter_eval_false` (List): Filtering with an always-false predicate gives an empty list.~~ 11. ~~`pairwise_concat` (List): Iff condition for Pairwise relation in concatenated lists (similar to pairwise_join).~~ 12. `list_map_toFinset` (Finset): toFinset commutes with map under injection --- - [x] depends on: #15952 This is my first PR to mathlib, so I'm not too familiar with etiquette's and more specifically there are two proofs in the PR which uses aesop, and I am not sure if it's frowned upon. I kept the aesop in there for now as I couldn't construct very short proofs otherwise. The sort_range function proof was suggested in https://leanprover.zulipchat.com/#narrow/stream/113489-new-members/topic/Computing.20Finset.20sort.20of.20Finset.20range/near/410346731 by Ruben Van de Velde. Thanks for your time for improving this PR. please-adopt t-data new-contributor merge-conflict awaiting-author 71/0 Mathlib/Data/Finset/Basic.lean,Mathlib/Data/Finset/Image.lean,Mathlib/Data/Finset/Sort.lean,Mathlib/Data/List/Sort.lean 4 30 ['YaelDillies', 'davikrehalt', 'eric-wieser', 'github-actions', 'jcommelin', 'urkud', 'vihdzp'] nobody
35-66154
1 month ago
815-37642
815 days ago
12-48883
12 days
36529 idontgetoutmuch
author:idontgetoutmuch
 Connection 1 form scribbles Some thoughts on connection 1-forms - not meant to be ever merged but here for convenience of discussion new-contributor t-differential-geometry 496/52 Mathlib/Analysis/ODE/PicardLindelof.lean,Mathlib/Geometry/Manifold/Algebra/FundamentalVectorField.lean,Mathlib/Geometry/Manifold/IntegralCurve/Compact.lean,Mathlib/Geometry/Manifold/IntegralCurve/ExistUnique.lean,Mathlib/Order/Filter/Prod.lean 5 2 ['github-actions'] nobody
34-55636
1 month ago
unknown
0-0
0 seconds
15720 znssong
author:znssong
 feat(SimpleGraph): The Bondy-Chvátal theorem The proof of the Bondy-Chvátal theorem, with Dirac's theorem and Ore's theorem as its corollary. - [x] depends on: #15536 - [ ] depends on: #15711 - [ ] depends on: #15578 merge-conflict blocked-by-other-PR t-combinatorics new-contributor 903/3 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/BondyChvatal.lean,Mathlib/Combinatorics/SimpleGraph/Finite.lean,Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean,Mathlib/Combinatorics/SimpleGraph/Path.lean,Mathlib/Combinatorics/SimpleGraph/Walk.lean,Mathlib/Dynamics/FixedPoints/Basic.lean,Mathlib/Dynamics/FixedPoints/Increasing.lean 8 3 ['github-actions', 'grunweg'] nobody
33-41140
1 month ago
612-70514
612 days ago
0-1791
29 minutes
22314 shetzl
author:shetzl
 feat: add leftmost derivations for context-free grammars Leftmost derivations are often easier to reason about than arbitrary derivations. This PR adds leftmost variants of Rewrites, Produces and Derives to the existing definition of context-free grammars and proves that a string of terminals can be derived iff it can be leftmost derived. Co-authored-by: Tobias Leichtfried --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability awaiting-author new-contributor 383/0 Mathlib.lean,Mathlib/Computability/LeftmostDerivation.lean 2 55 ['YaelDillies', 'github-actions', 'madvorak', 'mathlib4-merge-conflict-bot', 'shetzl'] nobody
33-41104
1 month ago
342-64400
342 days ago
72-3718
72 days
31610 rudynicolop
author:rudynicolop
 feat(Computability/NFA): Kleene star closure for Regular Languages via NFA This PR constructs a Kleene star closure for non-epsilon NFAs, and proves that regular languages are closed under Kleene star. The NFA construction is `NFA.kstar`. The main theorems are: - `NFA.accepts_kstar`: demonstrates that `M.kstar` accepts the Kleene star closure of the language of `M`. - `IsRegular.kstar`: demonstrates that regular languages are closed under Kleene star. There is an onging zulip discussion about regular languages in Mathlib: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Regular.20languages.3A.20the.20review.20queue/with/553759136 This discussion is also tracked at #24205. Furthermore, the construction and proofs in this PR are heavily inspired by @TpmKranz from his #15651. #15651 supersedes this PR, so if it is accepted then this PR is not needed. --- - [x] depends on: #31038 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability new-contributor awaiting-author awaiting-CI 405/7 Mathlib/Computability/NFA.lean 1 16 ['YaelDillies', 'ctchou', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
33-41003
1 month ago
92-33385
92 days ago
43-77956
43 days
30872 rudynicolop
author:rudynicolop
 feat(Computability/NFA): NFA closure under concatenation This PR proves that regular languages are closed under concatenation via a direct construction on `NFA`s without `εNFA` nor ε-transitions. The main new definitions and results include: - `M1.concat M2`, the concatenation of `NFA`s `M1` and `M2`, a direct construction without ε-transitions. - Theorem `accepts_concat : (M1.concat M2).accepts = M1.accepts * M2.accepts`, showing the correctness of the construction. - Theorem `IsRegular.mul`, showing that regular languages are closed under concatenation. --- - [x] depends on: #31038 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability new-contributor awaiting-author 104/7 Mathlib/Computability/NFA.lean 1 67 ['YaelDillies', 'ctchou', 'eric-wieser', 'github-actions', 'lambda-fairy', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'rudynicolop'] nobody
33-40983
1 month ago
77-29224
77 days ago
59-63981
59 days
35672 dennj
author:dennj
 feat(RingTheory/Polynomial/Cyclotomic): vanishing sums and fiber equidistribution at primitive roots ## Summary Building on `sum_eq_zero_iff_forall_eq` from #34592, this PR adds: - `cyclotomic_prime_coeff_eq_one`: for prime `p`, all coefficients of `cyclotomic p R` equal `1`. - `eq_nsmul_cyclotomic_of_nonneg_coeff`: a nonneg-coefficient polynomial vanishing at a primitive root is a positive scalar multiple of the cyclotomic polynomial. - `card_fiber_eq_card_div`: if a function `d : A → ZMod p` satisfies `∑ ζ^(d a) = 0`, then every fiber has cardinality `|A| / p`. These results are useful for combinatorial applications involving exponential sums and equidistribution over cyclic groups. Theorems imported from: https://github.com/Latinum-Agentic-Commerce/AlgebraicDesignTheory t-ring-theory new-contributor awaiting-author 101/1 Mathlib/RingTheory/Polynomial/Cyclotomic/Basic.lean,Mathlib/RingTheory/Polynomial/Cyclotomic/Roots.lean 2 5 ['github-actions', 'grunweg', 'ocfnash'] ocfnash
assignee:ocfnash
31-47106
1 month ago
43-38446
43 days ago
9-45761
9 days
34713 dennj
author:dennj
 feat(Probability/Markov): stationary distributions for stochastic matrices This PR proves that every row-stochastic matrix on a finite nonempty state space has a stationary distribution in the standard simplex. Main additions to `Mathlib/Probability/Markov/Stationary.lean`: - `IsStationary`: A distribution μ is stationary for matrix P if μ ᵥ* P = μ - `cesaroAverage`: Cesàro average of iterates of a vector under a matrix - `Matrix.rowStochastic.exists_stationary_distribution`: existence theorem The proof uses Cesàro averaging: start with uniform distribution, form averages, extract convergent subsequence by compactness, show limit is stationary via L¹ non-expansiveness. Also adds `vecMul_mem_stdSimplex` to `Stochastic.lean`: multiplying a probability vector by a row-stochastic matrix preserves simplex membership. t-algebra new-contributor awaiting-author
label:t-algebra$
 231/0 Mathlib.lean,Mathlib/LinearAlgebra/Matrix/Stochastic.lean,Mathlib/Probability/Markov/Stationary.lean 3 12 ['dennj', 'dupuisf', 'github-actions', 'grunweg', 'j-loreaux', 'mathlib-merge-conflicts', 'riccardobrasca'] nobody
31-46957
1 month ago
49-2261
49 days ago
10-33013
10 days
36587 yhx-12243
author:yhx-12243
 feat(Algebra/GCDMonoid): Distributive lattice structure for Associates in GCDMonoid Add a distributive lattice structure for `Associates α` in `GCDMonoid`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor
label:t-algebra$
 61/3 Mathlib.lean,Mathlib/Algebra/GCDMonoid/Basic.lean,Mathlib/Algebra/GCDMonoid/DistribLattice.lean 3 2 ['github-actions'] nobody
31-46760
1 month ago
31-45550
31 days ago
0-2836
47 minutes
36323 SproutSeeds
author:SproutSeeds
 feat(Inversion): discontinuity and center/global fderiv formulas Part of #5939 Adds the discontinuity-at-center lemma for inversion and derives the center/global `fderiv` formulas from it. This draft currently builds on the preceding cobounded-tendsto lemma from #36313 while that earlier slice is under review. Scope is limited to `Mathlib/Geometry/Euclidean/Inversion/Calculus.lean`. Tools used: Codex 5.3 extra high --- Happy to adjust naming, placement, or proof style based on maintainer preference. t-euclidean-geometry new-contributor LLM-generated 65/0 Mathlib/Geometry/Euclidean/Inversion/Basic.lean,Mathlib/Geometry/Euclidean/Inversion/Calculus.lean 2 2 ['github-actions'] nobody
31-46701
1 month ago
unknown
0-0
0 seconds
36387 FrankieeW
author:FrankieeW
 feat(NumberTheory/QuadraticField): parameter uniqueness for quadratic fields - [ ] depends on: #36347 ## Summary Prove that every quadratic field `ℚ(√d)` can be normalized to have a squarefree integer parameter, and that this parameter is unique. ## Main Results - `Qsqrtd.rescale`: rescaling isomorphism `ℚ(√d) ≃ₐ[ℚ] ℚ(√(a²d))` for `a ≠ 0` - `Qsqrtd_iso_int_param`: every `ℚ(√d)` is isomorphic to one with an integer parameter - `Qsqrtd_iso_squarefree_int_param`: every `ℚ(√d)` is isomorphic to one with a squarefree integer parameter - `Qsqrtd.param_unique`: if `ℚ(√d₁) ≃ₐ[ℚ] ℚ(√d₂)` with both `d₁, d₂` squarefree and `≠ 1`, then `d₁ = d₂` ## Helper Lemmas - `squarefree_eq_of_rat_sq_mul`: if `d₁ = d₂ · r²` with both squarefree, then `d₁ = d₂` - `int_dvd_of_ratio_square`: if `d₁/d₂` is a rational square and `d₂` is squarefree, then `d₂ ∣ d₁` - `not_isSquare_neg_one_rat`: `-1` is not a square in `ℚ` --- WIP t-number-theory blocked-by-other-PR new-contributor large-import LLM-generated 400/0 Mathlib.lean,Mathlib/Algebra/QuadraticAlgebra/Defs.lean,Mathlib/Algebra/Squarefree/Basic.lean,Mathlib/NumberTheory/QuadraticField/Basic.lean 4 4 ['FrankieeW', 'github-actions', 'mathlib-dependent-issues'] nobody
31-35060
1 month ago
38-84632
38 days ago
0-2
2 seconds
35651 sun123zxy
author:sun123zxy
 feat(Mathlib/RingTheory/Ideal/Cotangent): `Submodule.map` definition of cotangent spaces This PR adds an alternative definition of the cotangent space as an image under the R-module quotient map. --- Split from PR #33247 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory new-contributor awaiting-author 32/18 Mathlib/RingTheory/Ideal/Cotangent.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean 2 20 ['chrisflav', 'erdOne', 'github-actions', 'mathlib-merge-conflicts', 'sun123zxy'] chrisflav
assignee:chrisflav
31-32943
1 month ago
31-35748
31 days ago
16-12398
16 days
36757 alok
author:alok
 feat(Order/Filter): add Filter.IsFree and Filter.IsNonprincipal ## Summary Adds two filter predicates and their basic API: - **`Filter.IsFree`**: no point belongs to every set (`f.ker = ∅`), equivalently `f ≤ cofinite` - **`Filter.IsNonprincipal`**: not equal to `𝓟 s` for any set `s` Every free `NeBot` filter is non-principal (`IsFree.isNonprincipal`), but the converse fails for general filters (e.g. `𝓝 x` in a non-discrete T₁ space is non-principal but not free). For ultrafilters the two notions coincide (`Ultrafilter.isNonprincipal_iff_isFree`). On finite types, no `NeBot` filter is free (`not_isFree_of_neBot`). ## Test plan - [x] `lake build Mathlib.Order.Filter.Cofinite` passes - [x] `lake build Mathlib.Order.Filter.Ultrafilter.Basic` passes 🤖 Generated with [Claude Code](https://claude.com/claude-code) t-order new-contributor 98/1 Mathlib/Order/Filter/Cofinite.lean,Mathlib/Order/Filter/Ultrafilter/Basic.lean 2 2 ['github-actions'] nobody
31-1274
1 month ago
30-86274
30 days ago
0-3928
1 hour
35058 GrigorenkoPV
author:GrigorenkoPV
 chore: move tendsto_{floor,ceil}_at{Top,Bot} Moves: - Topology.Algebra.Order.Floor.tendsto_floor_atTop -> Order.Filter.AtTopBot.Floor.tendsto_floor_atTop - Topology.Algebra.Order.Floor.tendsto_floor_atBot -> Order.Filter.AtTopBot.Floor.tendsto_floor_atBot - Topology.Algebra.Order.Floor.tendsto_ceil_atTop -> Order.Filter.AtTopBot.Floor.tendsto_ceil_atTop - Topology.Algebra.Order.Floor.tendsto_ceil_atBot -> Order.Filter.AtTopBot.Floor.tendsto_ceil_atBot --- Tracked in #7987 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor large-import awaiting-author 22/25 Mathlib/Order/Filter/AtTopBot/Floor.lean,Mathlib/Topology/Algebra/Order/Floor.lean 2 3 ['GrigorenkoPV', 'github-actions', 'j-loreaux'] nobody
30-45409
30 days ago
37-19183
37 days ago
27-45743
27 days
34876 GrigorenkoPV
author:GrigorenkoPV
 feat(Tactic/AssumptionQuestion): add `assumption?` tactic --- As requested in #10361 TODO: maybe add some tests? [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta new-contributor awaiting-author 85/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/AssumptionQuestion.lean,Mathlib/Tactic/Common.lean,MathlibTest/AssumptionQuestion.lean,scripts/noshake.json 6 5 ['GrigorenkoPV', 'SnirBroshi', 'github-actions', 'joneugster'] joneugster
assignee:joneugster
30-44858
30 days ago
69-45812
69 days ago
0-83167
23 hours
34814 GrigorenkoPV
author:GrigorenkoPV
 feat(Tactic/ClearUnneeded): add `clear_unneeded` tactic --- The simplest version suggested in https://github.com/leanprover-community/mathlib4/issues/25319 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta new-contributor please-merge-master awaiting-author 94/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/ClearUnneeded.lean,Mathlib/Tactic/Common.lean,MathlibTest/ClearUnneeded.lean,scripts/noshake.json 6 12 ['BoltonBailey', 'GrigorenkoPV', 'github-actions', 'joneugster'] joneugster
assignee:joneugster
30-44709
30 days ago
69-47622
69 days ago
2-23785
2 days
34853 GrigorenkoPV
author:GrigorenkoPV
 feat(Combinatorics/Enumerative/Catalan): ratio of subsequent Catalan numbers --- Should I split this into 2 PRs? Otherwise it'll get squashed & be less concise. UPD: ok, I've opened #34854 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor 304/194 Mathlib.lean,Mathlib/Combinatorics/Enumerative/Catalan.lean,Mathlib/Combinatorics/Enumerative/Catalan/Basic.lean,Mathlib/Combinatorics/Enumerative/Catalan/Ratio.lean,Mathlib/Combinatorics/Enumerative/Catalan/Tree.lean,Mathlib/Combinatorics/Enumerative/DyckWord.lean,Mathlib/RingTheory/PowerSeries/Catalan.lean 7 5 ['github-actions', 'mathlib-merge-conflicts', 'vihdzp'] nobody
30-44032
30 days ago
69-45279
69 days ago
1-62439
1 day
35738 GrigorenkoPV
author:GrigorenkoPV
 perf: remove some `aesop`s and `grind`s --- Needs benchmarking. After that I can split it into several smaller portions, if needed. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor awaiting-author 236/92 Mathlib/Data/Finset/Card.lean,Mathlib/Data/Rel.lean,Mathlib/Data/Set/Lattice/Image.lean,Mathlib/Data/Set/Prod.lean,Mathlib/Logic/Equiv/Prod.lean,Mathlib/Order/Interval/Finset/Basic.lean,Mathlib/Order/KrullDimension.lean,Mathlib/Order/SupIndep.lean 8 7 ['github-actions', 'mathlib-merge-conflicts', 'themathqueen', 'vihdzp'] nobody
30-32267
30 days ago
50-60260
50 days ago
0-45583
12 hours
36786 SproutSeeds
author:SproutSeeds
 feat(DoubleCounting): parity of odd-degree vertices in bipartite incidence Adds `odd_card_filter_odd_bipartiteAbove_iff_odd_card_filter_odd_bipartiteBelow` to `Mathlib.Combinatorics.Enumerative.DoubleCounting`. This is the small parity-helper first step for #25231. Validation: - `lake build Mathlib.Combinatorics.Enumerative.DoubleCounting` Supersedes closed #36077 after replaying the helper cleanly on current `master`. AI usage: used Codex for branch recovery, replay onto current `master`, and draft wording; final code choices and verification by me. new-contributor t-combinatorics large-import 17/0 Mathlib/Combinatorics/Enumerative/DoubleCounting.lean 1 2 ['github-actions'] nobody
30-5088
30 days ago
30-5171
30 days ago
30-5160
30 days
31092 FlAmmmmING
author:FlAmmmmING
 feat(Algebra/Group/ForwardDiff.lean): Add theorem `sum_shift_eq_fwdDiff_iter`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor delegated
label:t-algebra$
 17/1 Mathlib/Algebra/Group/ForwardDiff.lean 1 20 ['BeibeiX0', 'FlAmmmmING', 'Ruben-VandeVelde', 'dagurtomas', 'github-actions', 'jcommelin', 'mathlib-bors', 'mathlib4-merge-conflict-bot'] nobody
29-39163
29 days ago
84-46943
84 days ago
54-22055
54 days
32608 PrParadoxy
author:PrParadoxy
 feat(LinearAlgebra/PiTensorProduct): API for PiTensorProducts indexed by sets This PR addresses a TODO item in LinearAlgebra/PiTensorProduct.lean: * API for the various ways ι can be split into subsets; connect this with the binary tensor product -- specifically by describing tensors of type ⨂ (i : S), M i, for S : Set ι. Our primary motivation is to formalise the notion of "restricted tensor products". This will be the content of a follow-up PR. Beyond that, the Set API is natural in contexts where the index type has an independent interpretation. An example is quantum physics, where ι ranges over distinguishable degrees of freedom, and where its is common practice to annotate objects by the set of indices they are defined on. --- Stub file with preliminary definition of the restricted tensor product as a direct limit of tensors indexed by finite subsets of an index type: https://github.com/PrParadoxy/mathlib4/blob/restricted-stub/Mathlib/LinearAlgebra/PiTensorProduct/Restricted.lean --- - [x] depends on: #32598 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor awaiting-zulip t-algebra
label:t-algebra$
 300/2 Mathlib.lean,Mathlib/LinearAlgebra/PiTensorProduct.lean,Mathlib/LinearAlgebra/PiTensorProduct/Set.lean 3 28 ['PrParadoxy', 'dagurtomas', 'eric-wieser', 'github-actions', 'goliath-klein', 'leanprover-radar', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
29-39136
29 days ago
115-38327
115 days ago
10-66980
10 days
32745 LTolDe
author:LTolDe
 feat(Topology/Algebra): add MulActionConst.lean add Topology/Algebra/MulActionConst.lean introduce class `ContinuousSMulConst` for a scalar multiplication that is continuous in the first argument, in analogy to `ContinuousConstSMul` define `MulAction.ball x U` as the set `U • {x}` given `[SMul G X] (x : X) (U : Set G)` The lemmas shown here will be useful to prove the **Effros Theorem**, see [zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Effros.20Theorem/with/558712441). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author new-contributor t-topology 117/0 Mathlib.lean,Mathlib/Topology/Algebra/MulActionConst.lean 2 8 ['LTolDe', 'github-actions', 'urkud'] nobody
29-39110
29 days ago
94-25454
94 days ago
16-55121
16 days
35652 dennj
author:dennj
 feat(LinearAlgebra/Matrix): add `Matrix.mul_eq_smul_one_symm` ## Summary - Add `Matrix.mul_eq_smul_one_symm`: if `M * N = c • 1` and `det M ≠ 0`, then `N * M = c • 1` - A scalar generalisation of `mul_eq_one_symm` (the `c = 1` case) to arbitrary scalars, requiring `IsDomain` and `det M ≠ 0` - The proof uses the adjugate identity `adjugate M * M = det M • 1` to derive `det M • (N * M) = det M • (c • 1)`, then cancels `det M` via `mul_left_cancel₀` Theorem imported from: https://github.com/Latinum-Agentic-Commerce/AlgebraicDesignTheory t-algebra new-contributor awaiting-author LLM-generated
label:t-algebra$
 28/0 Mathlib/LinearAlgebra/Matrix/NonsingularInverse.lean 1 4 ['dagurtomas', 'eric-wieser', 'github-actions', 'grunweg'] nobody
29-38987
29 days ago
35-46411
35 days ago
17-73114
17 days
36119 Ruizsolveall
author:Ruizsolveall
 feat(Topology/Covering): fundamental group of the circle is ℤ - Proves that the fundamental group of the circle `π₁(S¹, 0)` is isomorphic to `ℤ`, via covering space theory. - Constructs the winding number map `nLoop : ℤ → Path 0 0` on `AddCircle 1`, and proves it is surjective (`nLoop_surjective`), injective (`nLoop_homotopic_iff`), and additive (`nLoop_add`). - Assembles these into the group isomorphism `windingNumberIso : Multiplicative ℤ ≃* FundamentalGroup (AddCircle 1) 0`. ## Approach Uses the covering map `ℝ → AddCircle 1` and unique path lifting to establish the bijection between homotopy classes of loops and integers (winding numbers). Homotopy invariance of lifted endpoints gives injectivity; surjectivity follows from lifting arbitrary loops. Additivity uses path concatenation of lifts in the simply connected total space `ℝ`. ## AI disclosure I used Claude (Anthropic) to write the PR description, code comments, and to help refine code style. The proof strategy and all Lean code are my own. I understand and can vouch for all the code in this PR. t-topology new-contributor awaiting-author LLM-generated 236/0 Mathlib.lean,Mathlib/Topology/Covering/FundamentalGroupCircle.lean 2 26 ['Ruizsolveall', 'SnirBroshi', 'b-mehta', 'dagurtomas', 'github-actions', 'grunweg', 'vihdzp'] nobody
29-38857
29 days ago
35-29470
35 days ago
8-31258
8 days
29713 jessealama
author:jessealama
 feat(Algebra/Homology): add Euler–Poincaré formula This PR builds on the generalized Euler characteristic framework from #31121 to prove the Euler-Poincaré formula for chain complexes. PR #31121 defines the Euler characteristic for general homological complexes. This PR specializes those definitions to ℤ-indexed chain complexes and proves the main Euler-Poincaré theorem. ### Main result (in `EulerPoincare.lean`) * `ChainComplex.eulerChar_eq_homologyEulerChar`: For ℤ-indexed bounded chain complexes of finite-dimensional modules over a division ring, the alternating sum of chain dimensions equals the alternating sum of homology dimensions. ### Supporting lemmas The file also provides dimension lemmas generalized to arbitrary `HomologicalComplex (ModuleCat k) c` (not just ℤ-indexed chain complexes): * `HomologicalComplex.dFrom_zero_range` / `dTo_zero_range`: zero range when the target/source object is zero * `HomologicalComplex.dFrom_range_finrank_eq_d` / `dTo_range_finrank_eq_d`: range of `dFrom`/`dTo` has the same dimension as the underlying differential * `HomologicalComplex.range_dTo_le_ker_dFrom`: range of `dTo` is contained in the kernel of `dFrom` --- Builds on: #31121 Related to: #29639, #29643, #29646 awaiting-author t-algebra new-contributor
label:t-algebra$
 282/0 Mathlib.lean,Mathlib/Algebra/BigOperators/Intervals.lean,Mathlib/Algebra/Homology/EulerPoincare.lean 3 25 ['github-actions', 'jessealama', 'joelriou', 'kim-em', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] nobody
29-21274
29 days ago
173-71509
173 days ago
35-45800
35 days
36487 samueloettl
author:samueloettl
 feat(Dynamics): Ergodicity characterization --- - [ ] depends on: #35402 - [x] depends on: #35451 This is a work in progress for a characterization of ergodicity via a Birkhoff Average. Coarse Feedback is very encouraged. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP new-contributor large-import blocked-by-other-PR 421/1 Mathlib/Dynamics/Ergodic/Function.lean,Mathlib/Dynamics/Ergodic/OnAverageIndependent.lean,Mathlib/Topology/MetricSpace/Pseudo/Basic.lean 3 3 ['github-actions', 'mathlib-dependent-issues'] nobody
28-38345
28 days ago
36-43437
36 days ago
0-163
2 minutes
35951 parabamoghv
author:parabamoghv
 feat(CategoryTheory/Monoidal): evaluation coevaluation isomorphisms This PR adds four features to rigid categories: 1. `coevaluation_evaluation` and `evaluation_coevaluation` as isomorphism equalities: Using `IsIso` instances for the `evaluation` and `coevaluation` morphisms, we promote the morphism equalities to isomorphism equalities. 2. `ExactPairing Y X` from `ExactPairing X Y`: Using an exact pairing and `IsIso` instances for both `evaluation` and `coevaluation`, we swap the exact pairing by inverting the evaluation and coevaluation morphisms. Any suggestions for the definition name are welcome. Right now it is `ExactPairing.Symm`. The second choice was `ExactPairing.Swap`. 3. `HasLeftDual X` from `HasRightDual X`: Using a `HasRightDual X` instance and relevant `IsIso` instances, we construct a left dual. Similar construction for the other way. 4. `LeftDual` isomorphic to `RightDual`: Using relevant `IsIso` instances, we provide the isomorphism from the left dual of an object to the right dual. This can be achieved in two ways: either by using `leftDualIso` or using `rightDualIso`. We will prove in a subsequent PR that both these isomorphisms are equal. Motivation: This is part of an effort to formalize CategoricalGroups, which can be defined as right rigid groupoids. The approach is motivated by the discussion in [#34830](https://github.com/leanprover-community/mathlib4/pull/34830). Any comments or suggestions are welcome, especially about the naming. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory new-contributor awaiting-author 64/2 Mathlib/CategoryTheory/Monoidal/Rigid/Basic.lean 1 18 ['dagurtomas', 'github-actions', 'joelriou', 'parabamoghv', 'robin-carlier'] robin-carlier
assignee:robin-carlier
28-36267
28 days ago
28-36267
28 days ago
7-83579
7 days
36170 SproutSeeds
author:SproutSeeds
 feat(ContMDiff): add ContMDiff scalar-action typeclasses Closes #5617 Following the API pattern of `ContinuousConstSMul` and `ContinuousSMul`, this PR adds a smoothness parameter `n` to `ContMDiffConstSMul` and `ContMDiffSMul`, factors the generic `ContMDiff` scalar-action API into a dedicated file, and keeps `NormedSpace` focused on the standard scalar/vector instance. It also adds the corresponding `const_smul` and `smul` lemmas (`WithinAt`, `At`, `On`, and global versions). Tools used: Codex 5.3 extra high --- t-differential-geometry new-contributor awaiting-author LLM-generated 154/21 Mathlib.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Manifold.lean,Mathlib/Geometry/Manifold/Algebra/SmoothFunctions.lean,Mathlib/Geometry/Manifold/ContMDiff/MulAction.lean,Mathlib/Geometry/Manifold/ContMDiff/NormedSpace.lean 5 22 ['SproutSeeds', 'github-actions', 'grunweg', 'mathlib-bors', 'mathlib-merge-conflicts', 'sgouezel'] PatrickMassot
assignee:PatrickMassot
27-80079
27 days ago
36-78574
36 days ago
4-45581
4 days
34028 floor-licker
author:floor-licker
 feat(SimpleGraph): add max-flow/min-cut weak duality This PR introduces a basic s–t flow setup for undirected SimpleGraphs and proves the standard weak-duality inequality: for any feasible flow f and any s–t cut S, value f ≤ cutCapacity S. This is a small, self-contained lemma I extracted while working on larger graph-theoretic formalizations, in particular, results that will ultimately rely on a full max-flow/min-cut theorem. The full MFMC equality/existence statement is not included here. This is the weak-duality direction (∀ f S, value f ≤ cutCapacity S). t-combinatorics new-contributor 169/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/MaxFlowMinCut.lean 2 14 ['SnirBroshi', 'floor-licker', 'github-actions', 'mathlib-merge-conflicts'] kmill
assignee:kmill
27-34097
27 days ago
27-34050
27 days ago
60-20351
60 days
26413 michaellee94
author:michaellee94
 feat: existence of maximal solutions for ODEs meeting Picard-Lindelöf conditions Add existence proof for maximal solution of ODE using Picard-Lindelöf and a uniqueness theorem using Grönwall's lemma. --- - [x] depends on: #26382 - [ ] depends on: #29186 - [ ] depends on: #35043 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR new-contributor t-analysis merge-conflict 1300/431 Mathlib.lean,Mathlib/Analysis/ODE/Basic.lean,Mathlib/Analysis/ODE/ExistUnique.lean,Mathlib/Analysis/ODE/Gronwall.lean,Mathlib/Analysis/ODE/MaximalSolution.lean,Mathlib/Analysis/ODE/PicardLindelof.lean,Mathlib/Analysis/ODE/Transform.lean,Mathlib/Geometry/Manifold/IntegralCurve/Basic.lean,Mathlib/Geometry/Manifold/IntegralCurve/ExistUnique.lean,Mathlib/Geometry/Manifold/IntegralCurve/Transform.lean,Mathlib/Geometry/Manifold/IntegralCurve/UniformTime.lean,docs/1000.yaml,docs/undergrad.yaml 13 95 ['botbaki-review', 'github-actions', 'grunweg', 'leanprover-community-bot-assistant', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'michaellee94', 'winstonyin'] nobody
27-23221
27 days ago
290-48912
290 days ago
0-5139
1 hour
36825 danlyng
author:danlyng
 feat(MeasureTheory/Integral/IntegralEqImproper): add Iic variants of nonneg/nonpos derivative integrability and FTC-2 Add the `Iic` counterparts of the existing `Ioi` results for automatic integrability of derivatives on semi-infinite intervals and the corresponding corollaries computing the integral value. Additionally, apply minor fixes to existing docstrings. New declarations: - `integrableOn_Iic_deriv_of_nonneg` / `integrableOn_Iic_deriv_of_nonneg'` - `integrableOn_Iic_deriv_of_nonpos` / `integrableOn_Iic_deriv_of_nonpos'` - `integral_Iic_of_hasDerivAt_of_nonneg` / `integral_Iic_of_hasDerivAt_of_nonneg'` - `integral_Iic_of_hasDerivAt_of_nonpos` / `integral_Iic_of_hasDerivAt_of_nonpos'` These mirror `integrableOn_Ioi_deriv_of_nonneg`, `integrableOn_Ioi_deriv_of_nonpos`, `integral_Ioi_of_hasDerivAt_of_nonneg`, `integral_Ioi_of_hasDerivAt_of_nonpos` and their primed variants. t-measure-probability new-contributor awaiting-author 107/9 Mathlib/MeasureTheory/Integral/IntegralEqImproper.lean 1 7 ['EtienneC30', 'github-actions'] EtienneC30
assignee:EtienneC30
26-51404
26 days ago
26-51404
26 days ago
2-67942
2 days
32918 michelsol
author:michelsol
 feat: define `supEdist` and `supDist` Create a new file Topology.MetricSpace.SupDistance and define the supremal distance in (extended) metric spaces. The defined `supEdist` and `supDist` will have similar theory to the already existing `infEdist` and `infDist`. The motivation is to be able to define the radius of a minimal bounding sphere as the infimum of the supDist later. [zulip discussion here](https://leanprover.zulipchat.com/#narrow/channel/116395-maths/topic/Formalizing.20Jung's.20theorem.20and.20minimal.20bounding.20spheres) t-topology new-contributor merge-conflict 75/0 Mathlib.lean,Mathlib/Topology/MetricSpace/SupDistance.lean 2 5 ['github-actions', 'mathlib4-merge-conflict-bot', 'michelsol', 'urkud'] nobody
26-49416
26 days ago
101-27976
101 days ago
21-3598
21 days
33668 Citronhat
author:Citronhat
 feat(PMF): add lintegral formulas for PMF This PR introduces two lemmas describing the `lintegral` of a function with respect to the measure induced by a probability mass function: - `PMF.lintegral_eq_tsum` - `PMF.lintegral_eq_sum` These are the `ℝ≥0∞` analogues of the existing Bochner `integral` formulas `integral_eq_tsum` and `integral_eq_sum`. They could be useful for reasoning about expectations and integrability. In addition, the proof of `integral_eq_sum` is simplified by deriving it directly from `integral_eq_tsum` using `tsum_fintype`. t-measure-probability new-contributor awaiting-author merge-conflict 14/5 Mathlib/Probability/ProbabilityMassFunction/Integrals.lean 1 3 ['DavidLedvinka', 'github-actions', 'mathlib-merge-conflicts'] nobody
26-10603
26 days ago
44-62098
44 days ago
55-73479
55 days
33355 0xTerencePrime
author:0xTerencePrime
 feat(Combinatorics/SimpleGraph/Connectivity): define vertex connectivity This PR introduces the foundations of vertex connectivity for simple graphs, providing a counterpart to the edge connectivity theory in #32870. ### Main definitions - `SimpleGraph.IsVertexReachable`: vertices remain reachable after removing strictly fewer than `k` other vertices. - `SimpleGraph.IsVertexConnected`: a graph is `k`-vertex-connected if its order is strictly greater than `k` and any two distinct vertices are `k`-vertex-reachable. Includes basic characterizations for $k=0$ and $k=1$, along with monotonicity lemmas (`anti` and `mono`). new-contributor t-combinatorics awaiting-author merge-conflict 199/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/VertexConnectivity.lean,Mathlib/Combinatorics/SimpleGraph/IsolateVerts.lean 3 139 ['0xTerencePrime', 'SnirBroshi', 'SproutSeeds', 'YaelDillies', 'github-actions', 'mathlib-merge-conflicts', 'vihdzp'] nobody
26-10579
26 days ago
35-66292
35 days ago
35-56704
35 days
14669 Command-Master
author:Command-Master
 feat(Data/Nat/PartENat): add lemmas for PartENat Add some missing lemmas for `PartENat`, as well as the additive homomorphism from it to `WithTop Int`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-data new-contributor merge-conflict 90/0 Mathlib/Data/Nat/PartENat.lean 1 4 ['erdOne', 'github-actions', 'mathlib-merge-conflicts', 'urkud'] nobody
24-65526
24 days ago
643-67699
643 days ago
0-6775
1 hour
37109 zeekmartin
author:zeekmartin
 feat(SimpleGraph): card of common neighbors equals card of triangles containing edge Adds `SimpleGraph.card_commonNeighbors_eq_card_triangles_containing_edge` to `Mathlib/Combinatorics/SimpleGraph/Clique.lean`. For adjacent vertices `u v` in a finite simple graph, establishes the bijection between common neighbors and 3-cliques containing the edge `{u, v}`: ```lean theorem card_commonNeighbors_eq_card_triangles_containing_edge {u v : α} (huv : G.Adj u v) : (G.commonNeighbors u v).toFinset.card = ((G.cliqueFinset 3).filter fun s => {u, v} ⊆ s).card ``` This connects `commonNeighbors` (defined in `Basic.lean`) with `cliqueFinset` — a gap not previously covered in `Clique.lean`. **AI disclosure**: Claude (Anthropic) was used as an assistant during the development of this proof. It helped with the initial proof structure and tactic suggestions. The proof was reviewed and validated step by step by the author, who can vouch for all the content. The mathematical idea originates from the author's prior Lean 4 work on spectral graph theory (github.com/zeekmartin/topostability-lean4). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics LLM-generated new-contributor 61/0 Mathlib/Combinatorics/SimpleGraph/Clique.lean 1 7 ['SnirBroshi', 'github-actions', 'zeekmartin'] nobody
23-36047
23 days ago
23-43206
23 days ago
23-43195
23 days
37121 Smithl-Lin
author:Smithl-Lin
 feat(Probability/Martingale): Ville's supermartingale inequality ## Ville's supermartingale inequality This PR formalizes Ville's inequality for nonnegative supermartingales, providing time-uniform probability bounds. ### Main results - `Supermartingale.integral_le`: for a supermartingale, `E[f_j] ≤ E[f_i]` when `i ≤ j` - `Supermartingale.measureReal_le_div`: basic Ville inequality, `μ{ω | λ ≤ f n ω} ≤ E[f 0] / λ` - `Supermartingale.measureReal_le_div_forall`: quantified over all `n` - `Supermartingale.measureReal_sup_le_div`: **supremum version**, `μ{ω | ∃ n, λ ≤ f n ω} ≤ E[f 0] / λ` (proof via optional stopping, sorry pending) - `Supermartingale.integral_stoppedValue_le`: `E[f_τ] ≤ E[f 0]` for bounded stopping times (sorry pending) ### Addresses #36641 This PR includes the supremum statement using `IsStoppingTime` and `stoppedValue` as requested by @RemyDegenne on #36641. The two remaining `sorry`s follow the documented stopping time argument and will be filled in a follow-up. ### Motivation Ville's inequality is the foundation of anytime-valid inference, e-values, and safe sequential testing (Shafer 2021, Ramdas et al. 2023). The supremum version provides time-uniform control strictly stronger than pointwise Markov. ### References - Ville, J. (1939). Étude critique de la notion de collectif. - Howard, Ramdas, McAuliffe, Sekhon (2021). Time-uniform, nonparametric, nonasymptotic confidence sequences. *Ann. Statist.* t-measure-probability LLM-generated new-contributor 157/0 Mathlib.lean,Mathlib/Probability/Martingale/Ville.lean 2 3 ['github-actions', 'mathlib-bors'] nobody
23-12173
23 days ago
23-27866
23 days ago
0-482
8 minutes
36719 NoneMore
author:NoneMore
 feat(ModelTheory): add `PartialType` for first-order theories This PR adds the definitions of partial types over theories and over parameter sets, and proves several equivalent characterizations. --- - [ ] depends on: #36667 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-logic new-contributor 468/0 Mathlib.lean,Mathlib/ModelTheory/PartialTypes.lean,Mathlib/ModelTheory/Semantics.lean,Mathlib/ModelTheory/Syntax.lean 4 5 ['NoneMore', 'github-actions', 'mathlib-dependent-issues', 'vihdzp'] nobody
22-70279
22 days ago
31-69633
31 days ago
0-322
5 minutes
36347 FrankieeW
author:FrankieeW
 feat(NumberTheory/QuadraticField): define quadratic number fields as QuadraticAlgebra ℚ d 0 Define `Qsqrtd d` as `QuadraticAlgebra ℚ d 0`, representing the quadratic number field `ℚ(√d)`. Prove trace and norm results, show `Qsqrtd d` is a number field and a quadratic extension when `d` is not a perfect square, and prove that `ℚ(√0)` and `ℚ(√1)` are not fields. Include `IsQuadraticField` as a predicate for quadratic extensions of `ℚ`, and bridge lemmas connecting squarefree integer parameters to the non-square condition. This PR is part of a series upstreaming the [QuadraticNumberFields](https://github.com/FrankieeW/QuadraticNumberFields) project. [Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/quadratic.20number.20fields) --- ### PRs - #36347 （this PR） - #36387 --- t-number-theory new-contributor large-import awaiting-author LLM-generated 191/0 Mathlib.lean,Mathlib/Algebra/QuadraticAlgebra/Defs.lean,Mathlib/Algebra/Squarefree/Basic.lean,Mathlib/NumberTheory/QuadraticField/Basic.lean 4 25 ['FrankieeW', 'eric-wieser', 'github-actions', 'riccardobrasca', 'tb65536', 'wwylele'] tb65536
assignee:tb65536
22-61710
22 days ago
31-47000
31 days ago
7-10039
7 days
36850 whocares-abt
author:whocares-abt
 feat(Combinatorics/SimpleGraph/Acyclic): add delete leaf from tree gives tree Added theorem stating Deleting a leaf from a tree produces a tree. t-combinatorics new-contributor 5/0 Mathlib/Combinatorics/SimpleGraph/Acyclic.lean 1 7 ['github-actions', 'vlad902'] nobody
22-49188
22 days ago
26-74176
26 days ago
28-57021
28 days
35805 adrianmartir
author:adrianmartir
 feat(NumberTheory/Divisors): Add `infinite_setOf_divisors_iff` This proves that the set of divisors `{ m | m | n }` of a natural number `n` is infinite if and only if `n` is zero. The first proof draft was by @Aristotle-Harmonic. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory new-contributor awaiting-author 10/0 Mathlib/NumberTheory/Divisors.lean 1 6 ['adrianmartir', 'alexjbest', 'github-actions', 'tb65536'] tb65536
assignee:tb65536
22-44748
22 days ago
22-44749
22 days ago
27-18698
27 days
37161 mike1729
author:mike1729
 feat(Analysis/Normed/Module): add bornology and T2 instances for WeakSpace Register the norm bornology on `WeakSpace 𝕜 E` and prove that it coincides with the von Neumann bornology of the weak topology. ### New declarations * `WeakSpace.instBornology`: norm bornology inherited from `E`. * `WeakSpace.instT2Space`: Hausdorff via Hahn–Banach separation. * `WeakSpace.norm_topology_le_weakSpace_topology`: the weak topology is coarser than the norm topology. * `WeakSpace.isBounded_iff_isVonNBounded`: norm-boundedness equals weak von Neumann boundedness (no `[CompleteSpace E]` needed). --- - [ ] depends on: #37027 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR new-contributor 322/113 Mathlib.lean,Mathlib/Analysis/LocallyConvex/WeakBilin.lean,Mathlib/Analysis/LocallyConvex/WeakSpace.lean,Mathlib/Analysis/Normed/Module/WeakSpace.lean,Mathlib/Topology/Algebra/Module/WeakDual.lean,Mathlib/Topology/Algebra/Module/WeakSpace.lean 6 3 ['github-actions', 'mathlib-bors', 'mathlib-dependent-issues'] nobody
22-33890
22 days ago
22-56084
22 days ago
0-50
50 seconds
31590 SuccessMoses
author:SuccessMoses
 chore: tag `commutatorElement_def` with `simp` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-algebra new-contributor merge-conflict
label:t-algebra$
 1/0 Mathlib/Algebra/Group/Commutator.lean 1 3 ['github-actions', 'grunweg', 'mathlib-merge-conflicts'] nobody
22-33417
22 days ago
154-52352
154 days ago
0-1762
29 minutes
34722 GrigorenkoPV
author:GrigorenkoPV
 feat(Data/Finset/RangeDistance): bound distance between elements of `Finset.range` --- Rebase of https://github.com/leanprover-community/mathlib4/pull/26347 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-data awaiting-author 34/0 Mathlib.lean,Mathlib/Algebra/Order/Group/Unbundled/Abs.lean,Mathlib/Data/Finset/RangeDistance.lean 3 7 ['GrigorenkoPV', 'Vierkantor', 'github-actions', 'joneugster', 'mathlib-splicebot', 'plp127'] pechersky
assignee:pechersky
21-34195
21 days ago
21-34195
21 days ago
52-18954
52 days
36216 michaellee94
author:michaellee94
 feat(CategoryTheory): characterize pullback squares via the `Over` category --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory new-contributor maintainer-merge awaiting-author 47/0 Mathlib/CategoryTheory/Limits/Shapes/Pullback/IsPullback/Basic.lean 1 18 ['dagurtomas', 'github-actions', 'joelriou', 'michaellee94'] robin-carlier
assignee:robin-carlier
21-25273
21 days ago
21-25273
21 days ago
2-50782
2 days
34236 homeowmorphism
author:homeowmorphism
 feat(GroupTheory/FinitelyPresentedGroup): add finitely presented groups Formulation of finitely presented groups feat(GroupTheory/FinitelyPresentedGroup): add finitely presented groups We define the notion of `IsFinitelyPresented` with equivalent datatype notions, what it means for a subgroup to be finitely generated in the normal closure, and some instances of finitely presented groups. This started as an ItaLean2025 project. The related Zulip thread is here: https://leanprover.zulipchat.com/#narrow/channel/541885-ItaLean-2025/topic/Projects.3A.20Finitely.20Presented.20Groups/with/567565752. Use of AI: * Aristotle was used for giving a preliminary proof of some statements as this is my first contribution and I wanted to understand how to prove things; they have since been changed. * GPT-5.2 was used to generate some of the proof sub-statements for efficiency once the mathematical blueprints of the proofs have been worked out. * GPT-5.3 was used to rapidly refactor the code. Human review by PR author in-progress, but got to a point where it would be good to get external input. * GPT-5.4 was used to refactor the variables. Human PR author then rewrote the whole thing. --- - [x] depends on: #34580 - [x] depends on: #34624 - [x] depends on: #35033 - [x] depends on: #35029 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-group-theory new-contributor merge-conflict 305/0 Mathlib.lean,Mathlib/GroupTheory/FinitelyPresentedGroup.lean 2 72 ['copilot-pull-request-reviewer', 'eric-wieser', 'github-actions', 'grunweg', 'homeowmorphism', 'kbuzzard', 'mathlib-bors', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'tb65536'] nobody
21-745
21 days ago
28-22231
28 days ago
0-4650
1 hour
35857 AlexeyMilovanov
author:AlexeyMilovanov
 feat(Logic.Equiv.BijectiveBase2): add bijective base-2 numeration This PR introduces a formalization of the bijective base-2 numeration system. Unlike standard binary representation, bijective base-2 avoids the "leading zeros" problem, providing a strict mathematical bijection between natural numbers (`ℕ`) and lists of booleans (`List Bool`). **Main additions:** * `Equiv.BijectiveBase2.toBits`: Encodes `ℕ` to `List Bool`. * `Equiv.BijectiveBase2.ofBits`: Decodes `List Bool` to `ℕ`. * `equivBijectiveBase2`: The formal `ℕ ≃ List Bool` equivalence. --- Zulip: [#PR reviews > PR #35857: Bijective Base-2 Numeration](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/PR.20.2335857.3A.20Bijective.20Base-2.20Numeration/with/576336540) Zulip: [#batteries > Upstreaming Nat.Bits](https://leanprover.zulipchat.com/#narrow/channel/348111-batteries/topic/Upstreaming.20Nat.2EBits/with/580736051) *(Note: This replaces my previously closed PR to avoid the terminology clash between "Dyadic" and dyadic rationals. The namespace and definitions have been updated accordingly).* *(Note: Used AI to assist with standardizing proof structures).* t-logic new-contributor LLM-generated blocked-by-batt-PR 95/0 Mathlib.lean,Mathlib/Logic/Equiv/ListNatBijective.lean 2 6 ['AlexeyMilovanov', 'SnirBroshi', 'github-actions', 'joneugster'] nobody
20-58916
20 days ago
20-58966
20 days ago
27-59706
27 days
36463 AlexeyMilovanov
author:AlexeyMilovanov
 feat(Data.Nat.Bits): add Nat.ofBits and prove bits_injective This PR introduces `Nat.ofBitsList` for `List Bool` and provides the missing proofs that the standard binary representation `Nat.bits` is injective (`Nat.bits_injective`) and possesses a right inverse for normalized lists (`Nat.bits_ofBitsList`). `ofBitsList` is implemented as an `abbrev` using `foldr` (keeping it transparent to tactics like `simp`). It serves as the exact left inverse to `bits`. Furthermore, `bits_ofBitsList` establishes that `bits` and `ofBitsList` form a bijection between `ℕ` and the set of lists with no trailing `false` values. This avoids the name collision with `Nat.ofBits` from `Batteries` and aligns with previous Zulip discussions (see [here](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/PR.20.2335857.3A.20Bijective.20Base-2.20Numeration)) regarding the utility of having a complete list-based API for `Nat.bits` in the library. CC: @linesthatinterlace - Adds `Nat.ofBitsList` (as an `abbrev`) - Adds `Nat.ofBitsList_bits` (left inverse property) - Adds `Nat.bits_injective` - Adds `Nat.ofBitsList_eq_zero_iff` (helper lemma for lists without trailing zeros) - Adds `Nat.bits_ofBitsList` (right inverse property) --- Zulip: [#PR reviews > PR #35857: Bijective Base-2 Numeration](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/PR.20.2335857.3A.20Bijective.20Base-2.20Numeration/with/576336540) Zulip: [#batteries > Upstreaming Nat.Bits](https://leanprover.zulipchat.com/#narrow/channel/348111-batteries/topic/Upstreaming.20Nat.2EBits/with/580736051) t-data new-contributor awaiting-author blocked-by-batt-PR 68/1 Mathlib/Data/Nat/Bits.lean 1 5 ['github-actions', 'joneugster', 'linesthatinterlace'] nobody
20-58909
20 days ago
27-40621
27 days ago
9-58085
9 days
36274 JTylM
author:JTylM
 feat(Combinatorics/SimpleGraph/Matching): implemented the matchingNumber of a graph --- - [ ] depends on: #36406 - [ ] depends on: #32555 I implemented the matchingNumber as described in the issue and proved some statements including showing that there exists a matching achieving the matchingNumber. matchingNumber is increasing under injective maps matchingNumber is equal under isomorphisms matchingNumber of a matching is the cardinality of the matching This is my first PR and i had some trouble with some of the proofs, especially with the proof for matchingNumber.isAttained. So any suggestions on how to make the proofs shorter would be welcome. Also i was not sure about the naming of some of the theorems so i would apprechiate feedback here as well. new-contributor t-combinatorics blocked-by-other-PR 292/2 Mathlib/Combinatorics/SimpleGraph/Matching.lean 1 39 ['JTylM', 'SnirBroshi', 'SproutSeeds', 'github-actions', 'mathlib-dependent-issues', 'vlad902'] nobody
20-47927
20 days ago
28-49451
28 days ago
8-62228
8 days
35473 mike1729
author:mike1729
 feat(Analysis/Normed/Module): Schauder bases, basic sequences, and the Eberlein–Šmulian theorem This PR develops the theory of Schauder bases and basic sequences in Banach spaces, culminating in a proof of the **Eberlein–Šmulian theorem**: in a Banach space, a weakly countably compact set is weakly compact (and weakly sequentially compact). **Note:** This PR is too large to review in one go. It will be split into smaller parts and merged incrementally. The first part is already under review: The proof follows the basic-sequence approach of Pełczyński, as presented in Albiac–Kalton *Topics in Banach Space Theory* (2016). The main line of argument is: 1. Define generalized Schauder bases (indexed by arbitrary types with a summation filter) and the classical sequential Schauder basis as a special case. 2. Introduce basic sequences and their characterization via the Grünblum condition. 3. Prove the **selection principle**: extract basic sequences from sets where the weak and norm closures disagree (via a perturbation/finite-dimensional compactness argument in the dual). 4. Show that a bounded set containing no basic sequence has relatively weakly compact closure. 5. Combine these ingredients to prove both directions of the Eberlein–Šmulian theorem. ## Main definitions * `GeneralSchauderBasis β 𝕜 X L`: A Schauder basis for a normed space `X` over `𝕜`, indexed by a type `β` with a `SummationFilter L`. Unifies classical (sequential) and unconditional bases. * `BasicSequence 𝕜 X`: A bundled ℕ-indexed sequence forming a Schauder basis for its closed linear span. ## Main results * `isBasicSequence_of_Grunblum_with_bound`: A nonzero sequence satisfying the Grünblum condition is a basic sequence, with explicit basis constant bound. * `basic_sequence_selection_dual`: Extracts a basic sequence from a set that is weak*-dense near 0 but norm-separated from 0. * `exists_basicSequence_of_weakClosure_not_normClosure`: If 0 is in the weak closure of `S` but not its norm closure, then `S` contains a basic sequence. * `schauderBasisOfClosure`: Constructs a Schauder basis for the topological closure from a basis on a subspace. * `no_basic_sequence_implies_relatively_weakly_compact`: A bounded set with no basic sequence has weakly compact closure. * `eberlein_smulian_isSeqCompact`: A weakly countably compact set in a Banach space is weakly sequentially compact. * `eberlein_smulian`: **Eberlein–Šmulian theorem.** A weakly countably compact set in a Banach space is weakly compact. * `IsCompact.frechetUrysohnSpace`: Weakly compact subsets of a Banach space are Fréchet–Urysohn (angelic). ## References * [F. Albiac, N.J. Kalton, *Topics in Banach Space Theory*, Springer, 2016][albiac2016] * I. Singer, *Bases in Banach Spaces*, 1970. --- - [x] depends on: #34209 - [x] depends on: #35559 - [x] depends on: #36174 - [ ] depends on: #36849 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis new-contributor blocked-by-other-PR 2691/0 Mathlib.lean,Mathlib/Analysis/Normed/Module/SchauderBasis/Basic.lean,Mathlib/Analysis/Normed/Module/SchauderBasis/BasicSequence.lean,Mathlib/Analysis/Normed/Module/SchauderBasis/BasicSequenceSelection.lean,Mathlib/Analysis/Normed/Module/SchauderBasis/Closure.lean,Mathlib/Analysis/Normed/Module/SchauderBasis/CountablyCompact.lean,Mathlib/Analysis/Normed/Module/SchauderBasis/EberleinSmulian.lean,Mathlib/Analysis/Normed/Module/SchauderBasis/NoBasicSequence.lean 8 6 ['CoolRmal', 'github-actions', 'mathlib-dependent-issues', 'mike1729'] nobody
20-31122
20 days ago
unknown
0-0
0 seconds
36853 matthunz
author:matthunz
 feat(CategoryTheory/Monoidal/Braded/Traced): add `TracedCategory` class Adds a `TracedCategory` class following [A. Joyal and R. Street and D. R. Verity, *Traced monoidal categories*](https://www.cambridge.org/core/journals/mathematical-proceedings-of-the-cambridge-philosophical-society/article/abs/traced-monoidal-categories/2BE85628D269D9FABAB41B6364E117C8#article): ```lean /-- A traced symmetric monoidal category. -/ class TracedCategory (C : Type u) [Category.{v} C] [MonoidalCategory.{v} C] [SymmetricCategory.{v} C] where /-- The trace operator. -/ trace : ∀ {A B : C} (W : C), (A ⊗ W ⟶ B ⊗ W) → (A ⟶ B) /-- Left tightening: sliding a morphism past the trace on the left. -/ trace_naturality_left : ∀ {A A' B : C} (W : C) (f : A' ⟶ A) (g : A ⊗ W ⟶ B ⊗ W), trace W (f ▷ W ≫ g) = f ≫ trace W g := by cat_disch /-- Right tightening: sliding a morphism past the trace on the right. -/ trace_naturality_right : ∀ {A B B' : C} (W : C) (f : A ⊗ W ⟶ B ⊗ W) (g : B ⟶ B'), trace W (f ≫ g ▷ W) = trace W f ≫ g := by cat_disch /-- Sliding: an endomorphism on the feedback wire slides past the trace. -/ trace_dinaturality : ∀ {A B W : C} (f : A ⊗ W ⟶ B ⊗ W) (h : W ⟶ W), trace W (f ≫ B ◁ h) = trace W (A ◁ h ≫ f) := by cat_disch /-- Superposing: trace commutes with left tensoring by a bystander object. -/ trace_superposing : ∀ {A B : C} (C' W : C) (f : A ⊗ W ⟶ B ⊗ W), C' ◁ trace W f = trace W ((α_ C' A W).hom ≫ C' ◁ f ≫ (α_ C' B W).inv) := by cat_disch /-- Vanishing I: trace over the tensor unit is the morphism itself (up to unitors). -/ trace_vanishing_one : ∀ {A B : C} (f : A ⊗ 𝟙_ C ⟶ B ⊗ 𝟙_ C), trace (𝟙_ C) f = (ρ_ A).inv ≫ f ≫ (ρ_ B).hom := by cat_disch /-- Vanishing II: trace over a tensor product equals iterated trace. -/ trace_vanishing_two : ∀ {A B X Y : C} (f : A ⊗ (X ⊗ Y) ⟶ B ⊗ (X ⊗ Y)), trace (X ⊗ Y) f = trace X (trace Y ((α_ A X Y).hom ≫ f ≫ (α_ B X Y).inv)) := by cat_disch /-- Yanking: the trace of the braiding is the identity. -/ trace_yanking : ∀ (W : C), trace W (β_ W W).hom = 𝟙 W := by cat_disch ``` ## Motivation `TracedCategory` can be used for denoting things like electric circuits, which require a traced symmetric monoidal category for the wire graph network. ## Future work - `instance [CompactClosedCategory C] : TracedCategory C` - possible notation such as `Tr_[W] f` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory new-contributor awaiting-author 237/0 Mathlib.lean,Mathlib/CategoryTheory/Monoidal/Braided/Traced.lean,Mathlib/CategoryTheory/Monoidal/Rigid/Traced.lean,docs/references.bib 4 4 ['dagurtomas', 'github-actions', 'matthunz'] nobody
20-333
20 days ago
28-27959
28 days ago
0-25956
7 hours
33817 FlAmmmmING
author:FlAmmmmING
 fix(Combinatorics/Enumerative/Schroder): fix the definition of `smallSchroder` In the previous definition, the small Schröder numbers were defined as ```LaTeX s_0 = 1, s_1 = 1, s_2 = 1, s_3 = 3... ``` , which does not match the sequence listed in OEIS A006318. Moreover, this definition makes it difficult to correctly write the generating function for the small Schröder numbers. This PR fixes this issue. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics large-import awaiting-author 61/39 Mathlib/Combinatorics/Enumerative/Schroder.lean 1 20 ['FlAmmmmING', 'YaelDillies', 'github-actions', 'vihdzp'] YaelDillies
assignee:YaelDillies
19-445
19 days ago
21-79535
21 days ago
74-58112
74 days
34703 martinwintermath
author:martinwintermath
 Generalizing orthogonalBilin --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor 51/25 Mathlib/Analysis/InnerProductSpace/Orthogonal.lean,Mathlib/LinearAlgebra/QuadraticForm/Basic.lean,Mathlib/LinearAlgebra/SesquilinearForm/Basic.lean 3 1 ['github-actions'] nobody
18-51910
18 days ago
unknown
0-0
0 seconds
35069 A-M-Berns
author:A-M-Berns
 feat(Geometry/Polygon): simple polygons and boundary map This PR introduces Simple polygons with the predicate `IsSimple`, which captures the idea of a non-self-intersecting boundary, in the file Simple.lean. In the file Boundary.lean, a boundary map from `AddCircle n` is defined. I prove that the range of this map is the boundary and that this map is injective if and only if the polygon is simple. I kept Boundary.lean and Simple.lean separate because future results will include stuff just about the boundary map independent of simplicity (e.g. that it is continuous in the appropriate setting) and stuff just about simple polygons independent of the boundary map (e.g. that for n = 3, IsSimple iff HasNondegenerateVertices.) I used Claude Code to help generate some of the proof material, but I golfed and edited all AI contribution. - [x] depends on: #34598 --- new-contributor t-euclidean-geometry LLM-generated 360/0 Mathlib.lean,Mathlib/Geometry/Polygon/Boundary.lean,Mathlib/Geometry/Polygon/Simple.lean,Mathlib/Logic/Equiv/Fin/Rotate.lean 4 30 ['A-M-Berns', 'eric-wieser', 'github-actions', 'joneugster', 'jsm28', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vihdzp', 'wwylele'] jsm28
assignee:jsm28
18-26916
18 days ago
50-36479
50 days ago
52-70754
52 days
37006 hakii6
author:hakii6
 feat(LinearAlgebra/Matrix/Block, Analysis/Normed/Algebra/MatrixExponential): add BlockTriangular.pow and BlockTriangular.exp # Summary Add BlockTriangular.pow and BlockTriangular.exp for proving "det (exp A) = exp (trace A)" # Which part using LLM The part I used LLM is for 1. Searching duplicated theorems and lemmas I may missed (I already search them myself first). 2. Help me handle the "variables and signatures", the "letI" part, some of lemmas and theorems trivial but hard to find the true one. 3. After I finished, let them helped me check the structure match the disciplines of mathlib. 4. Check the steps PR match the disciplines of mathlib Most things above are done by me first, then let them to make sure I'm not missing something. # More context More context can be found in a topic in "# new member" in Zulip [#new members > (Matrix and NormedSpace.exp) | det (exp A) = exp (trace A)](https://leanprover.zulipchat.com/#narrow/channel/113489-new-members/topic/.28Matrix.20and.20NormedSpace.2Eexp.29.20.7C.20det.20.28exp.20A.29.20.3D.20exp.20.28trace.20A.29/with/580964688) new-contributor LLM-generated 54/1 Mathlib/Analysis/Normed/Algebra/MatrixExponential.lean,Mathlib/LinearAlgebra/Matrix/Block.lean,Mathlib/Topology/Instances/Matrix.lean 3 59 ['SnirBroshi', 'eric-wieser', 'github-actions', 'hakii6', 'wwylele'] nobody
18-16445
18 days ago
20-19413
20 days ago
25-10627
25 days
37071 ericluap
author:ericluap
 feat: Dedekind completion of rationals is isomorphic to EReal t-order new-contributor awaiting-author 96/0 Mathlib.lean,Mathlib/Data/EReal/Basic.lean,Mathlib/Data/EReal/DedekindCut.lean 3 36 ['ericluap', 'github-actions', 'vihdzp', 'wwylele'] vihdzp
assignee:vihdzp
17-34288
17 days ago
17-34288
17 days ago
5-74712
5 days
34419 ster-oc
author:ster-oc
 feat(RCLike): add `Continuous.re` and similar This PR adds dot notation for `re`, `im`, `conj` and `ofReal` for `Continuous`, `LipschitzWith` and `Memℓp`. Given `hf : Continuous f` it allows to use `hf.re` to express `Continuous (fun x ↦ (f x).re)`, similarly to the usual `hf.add hg`. I also can add the same features for `Summable` but I am not sure where to place them, suggestions are appreciated! --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis new-contributor awaiting-author merge-conflict 186/41 Mathlib/Analysis/Normed/Group/Uniform.lean,Mathlib/Analysis/Normed/Lp/lpSpace.lean,Mathlib/Analysis/RCLike/Basic.lean 3 15 ['github-actions', 'j-loreaux', 'mathlib-merge-conflicts', 'ster-oc'] j-loreaux
assignee:j-loreaux
17-19978
17 days ago
51-33733
51 days ago
8-27645
8 days
35316 mkaratarakis
author:mkaratarakis
 feat: lemmas for the analytic part of the proof of the Gelfond–Schneider theorem (Part 4/5) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory new-contributor 85/0 Mathlib.lean,Mathlib/NumberTheory/Transcendental/AnalyticPart.lean 2 12 ['MichaelStollBayreuth', 'SnirBroshi', 'github-actions', 'mathlib-dependent-issues', 'mkaratarakis'] MichaelStollBayreuth
assignee:MichaelStollBayreuth
16-51013
16 days ago
16-51068
16 days ago
20-69514
20 days
35376 michaellee94
author:michaellee94
 feat(Geometry/Manifold): orientable manifolds --- - [x] depends on: #33189 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor WIP t-differential-geometry merge-conflict awaiting-author 2116/11 Mathlib.lean,Mathlib/Geometry/Manifold/Instances/MoebiusBand.lean,Mathlib/Geometry/Manifold/Instances/Real.lean,Mathlib/Geometry/Manifold/IsManifold/ExtChartAt.lean,Mathlib/Geometry/Manifold/IsManifold/InteriorBoundary.lean,Mathlib/Geometry/Manifold/Orientation.lean,Mathlib/Topology/Closure.lean 7 8 ['Rida-Hamadani', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
16-48833
16 days ago
60-36322
60 days ago
0-169
2 minutes
30142 shalliso
author:shalliso
 feat(Topology/Baire): define IsNonMeagre non-meagre sets (also known as "of the second category") are worthy of their own definition and API. This was useful to me for formalizing a result of "automatic continuity", that is, a Baire-measurable homomorphism between Polish groups must be continuous. Simply working with the negation of IsMeagre quickly became cumbersome, and non-meagre sets have an important role in the study of Polish (e.g. locally compact) groups. From https://github.com/shalliso/automatic_continuity --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology new-contributor merge-conflict awaiting-author 83/1 Mathlib/Topology/Baire/NonMeagre.lean,Mathlib/Topology/GDelta/Basic.lean 2 6 ['github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] nobody
16-47240
16 days ago
196-19990
196 days ago
0-1020
17 minutes
37374 NoneMore
author:NoneMore
 feat(Topology/DerivedSet): add relative derived set lemmas Add `relDerivedSet`, `relDerivedSet_subset`, and `IsClosed.relDerivedSet_eq`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology new-contributor 17/0 Mathlib/Topology/DerivedSet.lean 1 6 ['NoneMore', 'github-actions', 'plp127', 'vihdzp'] PatrickMassot
assignee:PatrickMassot
16-42919
16 days ago
16-45073
16 days ago
17-12076
17 days
37445 edwin1729
author:edwin1729
 feat(Topology/Order): set of compact elements, generating basic opens contained in a `Locale.PT`, is directed This is (2/4) PRs culminating in a proof that "Scott Topologies over Algebraic DCPOs are Sober". In this PR we prove properties of a certain set of compact elements, w.r.t a `Locale.PT`. A `Locale.PT` can be thought of as a set of `Opens`. Precisely it is a Frame homomorphism from `Opens _` to `Prop` so we are essentially choosing certain `Opens` to form our set and this set has additional properties. Namely it is a completely prime filter: if the supremum of some Opens is contained than atleast one of the Opens must be contained. Take some `Locale.PT`, `x`. In this PR, we prove that the set of compact elements generating basic opens (compact elements generate topological basis see #31662) contained in `x` is directed. This set of compact elements defined above is important in subsequent parts of the proof since it fully determines `x`. - [ ] depends on: #31662 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology blocked-by-other-PR new-contributor 296/1 Mathlib.lean,Mathlib/Topology/Order/ScottTopology.lean,Mathlib/Topology/Order/ScottTopologyDCPO.lean,docs/references.bib 4 3 ['github-actions', 'mathlib-dependent-issues'] nobody
16-40200
16 days ago
16-40201
16 days ago
0-463
7 minutes
35317 mkaratarakis
author:mkaratarakis
 feat: lemmas for the analytic part of the proof of the Gelfond–Schneider theorem (Part 5/5) If a function `R : ℂ → ℂ` factors as `R z = (z - z₀) ^ r * R₁ z`, where `R₁` is analytic everywhere, then for any `k ≤ r`, there exists an everywhere analytic function `R₂ : ℂ → ℂ` such that the `k`-th iterated derivative of `R` is given by `deriv^[k] R z = (z - z₀) ^ (r - k) * (r! / (r - k)! * R₁ z + (z - z₀) * R₂ z)`. This lemma is necessary for the proof of the Gelfond-Schneider theorem in subsequent PRs. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory new-contributor t-analysis awaiting-author 57/0 Mathlib/Analysis/Complex/CauchyIntegral.lean 1 25 ['MichaelStollBayreuth', 'github-actions', 'loefflerd', 'mkaratarakis'] loefflerd
assignee:loefflerd
16-23513
16 days ago
16-23513
16 days ago
26-3985
26 days
36788 hommmmm
author:hommmmm
 feat(RingTheory): height of span of a prime element is one ## Summary - Add `Ideal.height_span_singleton_eq_one_of_prime`: in a Noetherian integral domain, the ideal generated by a prime element has height one. ## Notes The new theorem follows directly from `height_le_one_of_isPrincipal_of_mem_minimalPrimes` (upper bound) and the fact that `span {p} ≠ ⊥` for `p` prime (lower bound). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory new-contributor 12/1 Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean 1 5 ['Multramate', 'github-actions', 'hommmmm'] mattrobball
assignee:mattrobball
16-21010
16 days ago
16-22030
16 days ago
30-2854
30 days
36781 hommmmm
author:hommmmm
 feat(RingTheory/UniqueFactorizationDomain): UFD iff height one primes are principal We prove that a Noetherian integral domain is a UFD if and only if every prime ideal of height one is principal (`UniqueFactorizationMonoid.iff_height_one_prime_principal`). ## New declarations * `UniqueFactorizationMonoid.exists_height_one_le_of_finite_height`: given a prime of finite height ≥ 1, there exists a height one prime contained in it. * `UniqueFactorizationMonoid.ne_bot_of_height_one`: an ideal of height one is nonzero. * `UniqueFactorizationMonoid.height_ge_one_of_prime_ne_bot`: the height of a nonzero prime ideal in a domain is at least one. * `UniqueFactorizationMonoid.height_one_prime_principal`: in a UFD, every height one prime is principal. * `UniqueFactorizationMonoid.of_height_one_prime_principal`: every height one prime being principal implies UFD (Noetherian case). * `UniqueFactorizationMonoid.iff_height_one_prime_principal`: the full iff statement. ## References See https://stacks.math.columbia.edu/tag/0AFT ## AI Disclosure This code is written without AI, then uses Claude Code with cameronfreer's [Lean4-skills](https://github.com/cameronfreer/lean4-skills) (specifically, the `review`, `refactor`, and `golf` workflow) for style changes, refactoring and golfing. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory new-contributor large-import 102/1 Mathlib/RingTheory/UniqueFactorizationDomain/Kaplansky.lean 1 8 ['Thmoas-Guan', 'chrisflav', 'github-actions', 'hommmmm', 'tb65536'] mattrobball
assignee:mattrobball
16-10151
16 days ago
25-28392
25 days ago
29-63988
29 days
36886 Deep0Thinking
author:Deep0Thinking
 feat(Combinatorics/Enumerative/Bonferroni): add Bonferroni inequalities This PR adds Bonferroni inequalities. Main theorems: - `Finset.indicator_biUnion_le_bonferroniIndicator_of_odd` - `Finset.bonferroniIndicator_le_indicator_biUnion_of_even` - `Finset.card_biUnion_le_bonferroniCard_of_odd` - `Finset.bonferroniCard_le_card_biUnion_of_even` Co-authored-by: Claude (Opus 4.6) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor 334/4 Mathlib.lean,Mathlib/Combinatorics/Enumerative/Bonferroni.lean,Mathlib/Combinatorics/Enumerative/InclusionExclusion.lean 3 4 ['AlexeyMilovanov', 'Deep0Thinking', 'github-actions'] nobody
15-53463
15 days ago
27-46111
27 days ago
27-46929
27 days
37101 fsefzig
author:fsefzig
 feat: definition of kummer polynomials and prove that AdjoinRoot (KummerPolynomial n s) is etale This defines the Kummer polynomial ` KummerPolynomial n s := X^n - s` over a ring R and constructs the following instances for `AdjoinRoot (KummerPolynomial n s)`: · Faithfullyflat · SmoothOfRelativeDimension 0 · Etale t-ring-theory new-contributor awaiting-author 345/0 Mathlib.lean,Mathlib/RingTheory/AdjoinRootKummer.lean 2 24 ['acmepjz', 'chrisflav', 'fsefzig', 'github-actions', 'vihdzp'] nobody
15-35863
15 days ago
unknown
0-0
0 seconds
36917 iarnoldy
author:iarnoldy
 feat(LinearAlgebra/CliffordAlgebra): bivector Lie subalgebra Define the submodule of grade-n elements (n-vectors) in a Clifford algebra and show that bivectors (n = 2) form a `LieSubalgebra` under the commutator bracket. This gives the standard construction of so(Q) from Cl(Q). Main definitions: * `CliffordAlgebra.nvector` — grade-n submodule, spanned by n-fold products of ι * `CliffordAlgebra.bivector` — nvector 2 Q, the bivector submodule * `CliffordAlgebra.bivectorLieSubalgebra` — LieSubalgebra of bivectors Main results: * `CliffordAlgebra.lie_ι_mul_ι` — explicit commutator formula for bivector generators * `CliffordAlgebra.lie_mem_bivector` — bracket closure of the bivector submodule * `CliffordAlgebra.bivector_le_evenOdd_zero` — bivectors lie in the even part The `LieModule` instance for `CliffordAlgebra Q` acting on itself is provided explicitly (`instLieModuleSelf`) because automatic synthesis exceeds the default heartbeat limit. AI disclosure: This code was generated with AI assistance (Claude, Anthropic). The submitter directed the construction and QA but is not a Lean programmer. The mathematical content is classical (Doran & Lasenby, Ch. 3). Extra review scrutiny is welcomed. Co-authored-by: Claude --- Open design questions for reviewers: 1. **Naming**: Is `nvector` the right name? Eric Wieser suggested generalizing to n-vectors. Alternatives: `ιProd`, `grade`, or following the `exteriorPower` pattern via `equivExterior` pullback. 2. **Scalar contamination**: The spanning set `{ι m₁ * ι m₂}` includes `ι m * ι m = Q(m)` (scalars). Eric suggested pulling back `exteriorPower` through `equivExterior` for pure grades (requires `Invertible (2 : R)`). Happy to rework if that's preferred. 3. **instLieModuleSelf**: Should this be an upstream issue rather than a local workaround? @ocfnash 4. **ι_mul_ι_comm'**: This may duplicate existing API (`ι_mul_ι_comm b a` plus `polar_comm`). Happy to inline if reviewers prefer. Discussed on Zulip: https://leanprover.zulipchat.com (Is there code for X? thread) new-contributor t-algebra LLM-generated
label:t-algebra$
 338/0 Mathlib.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Bivector.lean 2 2 ['github-actions'] eric-wieser
assignee:eric-wieser
15-10564
15 days ago
27-16932
27 days ago
27-18146
27 days
32583 MJ141592
author:MJ141592
 refactor(SimpleGraph): change bridges not to require the edge to be present Remove the requirement for edges to exist in definition of isBridge, and then change the related lemmas to adjust for this, by renaming, fixing the statements and fixing the proofs, including in Acyclic. Closes #31690. --- - [x] depends on: #36802 - [x] depends on: #36804 t-combinatorics new-contributor 84/84 Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/Connected.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/EdgeConnectivity.lean,Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean 4 20 ['MJ141592', 'SnirBroshi', 'YaelDillies', 'b-mehta', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] nobody
14-68155
14 days ago
14-68191
14 days ago
15-10301
15 days
34487 martinwintermath
author:martinwintermath
 feat(LinearAlgebra/SesquilinearForm): add instances for SeparatingLeft, SeparatingRight and Nondegenerate Add typeclass instances for `Fact B.SeparatingLeft`, `Fact B.SeparatingRight`, `Fact B.Nondegenerate`: * inferring `Fact B.flip.SeparatingLeft` from `Fact B.SeparatingRight` and vice versa * inferring `Fact B.SeparatingLeft` and `Fact B.SeparatingRight` from `Fact B.Nondegenerate` * inferring `Fact B.SeparatingLeft` and `Fact B.Nondegenerate` for `.id` and `Dual.eval` * inferring `Fact B.Nondegenerate` from `B.IsPerfPair` I also updated `PointedCone.dual_univ` to demonstrate the usefulness of these additions. Note that I needed to add an import to `Cone/Dual.lean` which somehow imports cardinals. So I needed to remove cardinals from `assert_not_exists`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor large-import
label:t-algebra$
 84/16 Mathlib/Geometry/Convex/Cone/Dual.lean,Mathlib/LinearAlgebra/Dual/Lemmas.lean,Mathlib/LinearAlgebra/PerfectPairing/Basic.lean,Mathlib/LinearAlgebra/SesquilinearForm/Basic.lean 4 4 ['github-actions', 'martinwintermath', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] joelriou
assignee:joelriou
14-51718
14 days ago
17-44218
17 days ago
13-75766
13 days
31670 edwin1729
author:edwin1729
 feat(Topology/Order): Scott Topology is Sober over Algebraic DCPO --- [Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/.3E.20Algebraic.20complete.20partial.20order.20and.20domain.20theory/with/536359313) here (2/2) PR to prove result in Stone Duality. Here we prove that Scott Topologies over Algebraic DCPOs are sober. - [ ] depends on: #31662 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology blocked-by-other-PR new-contributor 456/1 Mathlib.lean,Mathlib/Topology/Order/ScottTopology.lean,Mathlib/Topology/Order/ScottTopologyDCPO.lean,docs/references.bib 4 4 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
14-43371
14 days ago
unknown
0-0
0 seconds
37556 edwin1729
author:edwin1729
 feat(Topology/Order): Locale.localePointOfSpacePoint if we have a Scott Topology from an Algebraic DCPO (3/4) in a series of PRs proving that "Scott Topologies over Algebraic DCPOs are Sober" We prove here that the unit of the adjunction from `TopCat` to `Locale` defined in `Topology/Order/Category/FrameAdjunction.lean` is a surjective mapping, under the following condition: The underlying TopologicalSpace must be a Scott Topology generated with an underlying Algebraic DCPO structure. - [ ] depends on: #37445 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology new-contributor blocked-by-other-PR 393/1 Mathlib.lean,Mathlib/Topology/Order/ScottTopology.lean,Mathlib/Topology/Order/ScottTopologyDCPO.lean,docs/references.bib 4 4 ['github-actions', 'mathlib-dependent-issues'] nobody
14-40221
14 days ago
14-40222
14 days ago
0-1300
21 minutes
36704 adam84-hub
author:adam84-hub
 chore(Function): add surjective_iff Adds an explicit discoverable definitional lemma for `Function.Surjective`. - addresses #31745 - scope is intentionally tiny: one theorem in `Mathlib/Logic/Function/Defs.lean` AI was used for drafting; I reviewed the final code and understand it well enough to vouch for it. t-logic new-contributor awaiting-author 4/0 Mathlib/Logic/Function/Defs.lean 1 11 ['SnirBroshi', 'adam84-hub', 'github-actions', 'plp127', 'vihdzp'] nobody
14-35692
14 days ago
32-5389
32 days ago
0-2124
35 minutes
34054 YellPika
author:YellPika
 feat(Order/OmegaCompletePartialOrder): OmegaCompletePartialOrder instance for `Sigma` with basic `ωScottContinuous` lemmas This PR adds an `OmegaCompletePartialOrder` instance for `Sigma` along with `ωScottContinuous` lemmas for basic operations (`mk`, `fst`, `snd`). Appropriate lemmas are marked with `@[fun_prop]` so that the `fun_prop` tactic can automatically deduce `ωScottContinuous` proofs for functions involving `Sigma`s. --- - [x] depends on: #33941 - [ ] depends on: #37258 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-order please-merge-master awaiting-author 172/0 Mathlib/Data/Sigma/Order.lean,Mathlib/Order/OmegaCompletePartialOrder.lean 2 28 ['Vierkantor', 'YellPika', 'github-actions', 'grunweg', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] grunweg
assignee:grunweg
14-32827
14 days ago
55-27022
55 days ago
16-66871
16 days
36832 KryptosAI
author:KryptosAI
 chore(Data/Finset/Card): rename `pred_card_le_card_erase` to `sub_one_card_le_card_erase` ## Summary The name `pred_card_le_card_erase` suggests `Nat.pred` but the statement uses `- 1` (i.e., `Nat.sub 1`). Rename to `sub_one_card_le_card_erase` to match the actual statement. A deprecated alias is added for backwards compatibility. ### Files changed - `Mathlib/Data/Finset/Card.lean` — definition renamed + deprecated alias - `Mathlib/Data/Finset/Powerset.lean` — reference updated - `Mathlib/Combinatorics/Additive/SubsetSum.lean` — reference updated - `Mathlib/Algebra/Polynomial/EraseLead.lean` — reference updated Addresses the `Finset.pred_card_le_card_erase` item in #21584. ## AI disclosure I used Claude Code to explore the codebase (finding all references to rename) and to draft the PR description. I reviewed and understand all changes — these are straightforward renames with a deprecated alias. new-contributor 22/15 Mathlib/Algebra/Polynomial/EraseLead.lean,Mathlib/Combinatorics/Additive/SubsetSum.lean,Mathlib/Combinatorics/SetFamily/AhlswedeZhang.lean,Mathlib/Combinatorics/SetFamily/Shadow.lean,Mathlib/Data/Finset/Card.lean,Mathlib/Data/Finset/Powerset.lean,Mathlib/Data/Set/Card.lean,Mathlib/GroupTheory/Perm/Support.lean,Mathlib/RingTheory/Ideal/Operations.lean 9 5 ['KryptosAI', 'Multramate', 'github-actions', 'ooovi'] nobody
14-6748
14 days ago
14-6806
14 days ago
28-17123
28 days
37585 cascone26
author:cascone26
 feat: formal statements of Robin's and Lagarias' inequalities equivalent to RH ## Summary This PR adds `Mathlib/NumberTheory/LSeries/RobinInequality.lean`, which contains formal Lean 4 statements of two classical equivalences of the Riemann Hypothesis: **Robin's theorem (1984):** RH ↔ σ₁(n) < e^γ · n · ln(ln(n)) for all n > 5040 **Lagarias' theorem (2002):** RH ↔ σ₁(n) ≤ H_n + exp(H_n) · ln(H_n) for all n ≥ 1 ### New declarations - `robinBound (n : ℕ) : ℝ` — the Robin bound e^γ · n · ln(ln(n)) - `lagariasBound (n : ℕ) : ℝ` — the Lagarias bound H_n + exp(H_n) · ln(H_n) - `robin_iff_RH : RiemannHypothesis ↔ ∀ n > 5040, σ₁(n) < robinBound n` - `lagarias_iff_RH : RiemannHypothesis ↔ ∀ n ≥ 1, σ₁(n) ≤ lagariasBound n` ### Status The **statements** are complete and use existing Mathlib primitives: - `ArithmeticFunction.sigma` for σ₁ - `Real.eulerMascheroniConstant` for γ - `harmonic` for H_n (with ℚ → ℝ coercion) - `RiemannHypothesis` from `Mathlib.NumberTheory.LSeries.RiemannZeta` The **proofs** are currently `sorry`. The Robin direction (RH → inequality) requires analytic number theory following Robin's original 1984 paper. The converse uses Gronwall's theorem on superior highly composite numbers. Both are substantial Mathlib projects in their own right. This PR establishes the formal statements as a foundation for future proof work. These equivalences are not currently formalized anywhere in Mathlib. ### References - G. Robin, *Grandes valeurs de la fonction somme des diviseurs et hypothèse de Riemann*, J. Math. Pures Appl. **63** (1984), 187–213. - J. Lagarias, *An elementary problem equivalent to the Riemann hypothesis*, Amer. Math. Monthly **109** (2002), 534–543. ### Note on `sorry` I'm aware Mathlib does not merge `sorry`-laden PRs in general. I'm submitting this as a draft to: 1. Get feedback on whether the statement formulation is idiomatic 2. Establish that these statements don't already exist in Mathlib under a different name 3. Invite collaboration on completing the proofs t-number-theory new-contributor 98/0 Mathlib/NumberTheory/LSeries/RobinInequality.lean 1 2 ['github-actions'] nobody
13-81028
13 days ago
unknown
0-0
0 seconds
28613 espottesmith
author:espottesmith
 feat(Combinatorics): define undirected hypergraphs This PR defines undirected hypergraphs: ``` @[ext] structure Hypergraph (α : Type*) where /-- The vertex set -/ vertexSet : Set α /-- The hyperedge set -/ hyperedgeSet : Set (Set α) /-- All hyperedges must be subsets of the vertex set -/ hyperedge_isSubset_vertexSet : ∀ ⦃e⦄, e ∈ hyperedgeSet → e ⊆ vertexSet ``` In addition to the main definition, some additional definitions and related lemmas are provided: - vertex adjacency - hyperedge adjacency - vertex "stars" - special cases (loops, empty hypergraphs, trivial hypergraphs, complete hypergraphs, simple hypergraphs, k-uniform hypergraphs, and d-regular hypergraphs) - (some) hypergraph cardinality - subhypergraphs, induced subhypergraphs, and partial hypergraphs This implementation is certainly bare-bones. I'm submitting this PR at this point, rather than when my developments are more fleshed out, because there has been some interest in others contributing to hypergraph formalization in mathlib. In the near future, goals include: - defining incidence matrices (i.e., conversion from `Hypergraph α` to `Matrix α (Set α) β` - coersion/generalization of graph as 2-uniform hypergraph - conversion of a hypergraph into its associated clique graph/two-section graph - constructing the dual of a hypergraph (note: on first blush, this appears somewhat challenging, given that we define hyperedges as `Set α` rather than some other type `β`) - rank and co-rank - walks, paths, cycles, etc. on hypergraphs --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor 378/0 Mathlib.lean,Mathlib/Combinatorics/Hypergraph/Basic.lean 2 54 ['b-mehta', 'espottesmith', 'github-actions', 'jt496', 'lauramonk', 'mathlib4-merge-conflict-bot'] b-mehta
assignee:b-mehta
13-68655
13 days ago
13-68120
13 days ago
76-59027
76 days
29744 espottesmith
author:espottesmith
 feat(Combinatorics): define directed hypergraphs This PR defines directed hypergraphs: ``` @[ext] structure DiHypergraph (α : Type*) where /-- The vertex set -/ vertexSet : Set α /-- The edge set -/ edgeSet : Set ((Set α) × (Set α)) /-- Each edge is a pair (s, d), where s ⊆ vertexSet and d ⊆ vertexSet -/ edge_src_dst_isSubset_vertexSet' : ∀ ⦃e⦄, e ∈ edgeSet → e.1 ⊆ vertexSet ∧ e.2 ⊆ vertexSet ``` Additional definitions: - tail/head stars and negative/positive stars - some special cases (B-Graph, F-Graph, BF-Graph, and what I'm calling a "non-endless" dihypergraph, where neither the source/tail nor the destination/head are empty) - Vertex and (hyper)edge adjacency - isolated vertices - empty and nonempty dihypergraphs The design employed here is based off of #28613, but this PR does not depend on that one. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor 395/0 Mathlib.lean,Mathlib/Combinatorics/DiHypergraph/Basic.lean 2 2 ['github-actions', 'mathlib4-merge-conflict-bot'] b-mehta
assignee:b-mehta
13-66362
13 days ago
13-66409
13 days ago
71-49865
71 days
36937 Yaohua-Leo
author:Yaohua-Leo
 feat(Algebra/Jordan): add first linearization lemmas for IsCommJordan [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) AI assistance disclosure: I used AI assistance for CI/debugging and module-structure fixes in this PR. The mathematical content and main lemmas were written by me, with help from @pelicanhere. This PR adds a new file `Mathlib/Algebra/Jordan/Linearization.lean` containing linearization lemmas for the commutative Jordan identity. Main declarations: * `IsCommJordan.four_nsmul_associator_mul_add` * `IsCommJordan.associator_mul_add` These lemmas formalize a first linearization of the commutative Jordan identity using `associator`, following McCrimmon, Proposition 1.8.5. --- I put these lemmas in a separate file because I expect follow-up linearization lemmas to belong naturally in the same place. I am also happy to rename declarations or move the file if reviewers would prefer. t-algebra new-contributor awaiting-author
label:t-algebra$
 60/0 Mathlib.lean,Mathlib/Algebra/Jordan/Linearization.lean 2 6 ['Yaohua-Leo', 'github-actions', 'grunweg', 'ocfnash'] ocfnash
assignee:ocfnash
13-60375
13 days ago
13-60375
13 days ago
13-10710
13 days
33714 idontgetoutmuch
author:idontgetoutmuch
 feat(Mathlib/Geometry/Manifold): Riemannian metrics exist II Supersedes https://github.com/leanprover-community/mathlib4/pull/33519 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry new-contributor awaiting-author 700/0 Mathlib.lean,Mathlib/Geometry/Manifold/ExistsRiemannianMetric.lean,Mathlib/Geometry/Manifold/PartitionOfUnity.lean 3 200 ['Rida-Hamadani', 'github-actions', 'grunweg', 'idontgetoutmuch'] ocfnash
assignee:ocfnash
13-43497
13 days ago
15-65808
15 days ago
45-7453
45 days
34182 IlPreteRosso
author:IlPreteRosso
 refactor(Data/Finsupp): deprecate direct single ↔ Set.indicator shortcuts, add indicator_eq_set_indicator Routes Finsupp.single ↔ Set.indicator through Pi.single instead of direct shortcuts. Adds `indicator_eq_set_indicator` bridging `Finsupp.indicator` and `Set.indicator` for non-dependent functions. Deprecates `single_eq_set_indicator` and `single_eq_indicator` — users should compose through `single_eq_pi_single` + `Set.indicator_singleton` instead. Golfs `single_eq_update` via `single_eq_pi_single`. Continues #34083. t-data new-contributor 27/19 Mathlib/Data/Finsupp/Indicator.lean,Mathlib/Data/Finsupp/Single.lean 2 31 ['IlPreteRosso', 'eric-wieser', 'github-actions', 'mathlib-bors', 'urkud'] TwoFX
assignee:TwoFX
13-31778
13 days ago
13-38039
13 days ago
86-6820
86 days
36813 AlexeyMilovanov
author:AlexeyMilovanov
 feat(Computability.Encoding): add self-delimiting unary and pair encodings Adds `unaryPrefix` (a self-delimiting $1^n 0$ code) and `prefixPair` to `Mathlib.Computability.Encoding`. **Key changes:** * **`unaryPrefix`**: A prefix-free unary encoding for $\mathbb{N}$, distinct from the existing `unaryEncodeNat`. * **`unaryPrefix_append_inj`**: A basic cancellation lemma that allows unique extraction of a unary prefix from a concatenated list. * **`prefixPair`**: A self-delimiting pairing function for boolean lists, defined as $\text{unaryPrefix } |x| \frown x \frown y$. * **`prefixPair_inj`**: A concise proof of pair injectivity leveraging the new prefix lemmas. t-computability new-contributor awaiting-author 56/1 Mathlib/Computability/Encoding.lean 1 2 ['Komyyy', 'github-actions'] Komyyy
assignee:Komyyy
13-1396
13 days ago
13-1396
13 days ago
16-42277
16 days
37593 IlPreteRosso
author:IlPreteRosso
 refactor(Data.Finset.*Antidiagonal): rename set-based defs to `set*Antidiagonal` Renames set-based `Finset.mulAntidiagonal` → `setMulAntidiagonal` (and SMul/VAdd variants) to free the `mulAntidiagonal` name for the planned `HasMulAntidiagonal` typeclass. Deprecation aliases added. Supersedes #34551 t-ring-theory new-contributor 178/96 Mathlib/Algebra/Order/Antidiag/Prod.lean,Mathlib/Data/Finset/MulAntidiagonal.lean,Mathlib/Data/Finset/SMulAntidiagonal.lean,Mathlib/RingTheory/HahnSeries/Multiplication.lean,Mathlib/RingTheory/HahnSeries/PowerSeries.lean,Mathlib/RingTheory/HahnSeries/Summable.lean 6 2 ['github-actions'] nobody
12-86393
12 days ago
13-49639
13 days ago
13-51402
13 days
35733 mkaratarakis
author:mkaratarakis
 feat: Algebraic setup and matrix coefficients for Gelfond-Schneider theorem This PR introduces the foundational algebraic setup and coefficient bounds required for the proof of the Gelfond-Schneider Theorem (Hilbert's Seventh Problem), which establishes that for algebraic numbers $\alpha \neq 0, 1$ and irrational algebraic $\beta$, the number $\alpha^\beta$ is transcendental. Following the contradiction argument presented in Loo-Keng Hua's "Introduction to Number Theory" (Chapter 17.9, 490 -493) Gelfond's Proof), this file constructs the common number field $K$ and sets up the scaled algebraic integers for the auxiliary linear system. This system will later be solved via Siegel's lemma (Lemma 8.2, 490, Hua). This PR is essentially the first half of page 490 in the book. The proof proceeds by assuming $\gamma = \alpha^\beta$ is algebraic, meaning $\alpha$, $\beta$, and $\gamma$ all lie in an algebraic field $K$ of degree $h$. 1. Bundles the common number field $K$, the complex embeddings, and the algebraic preimages $\alpha', \beta', \gamma'$, alongside the core hypotheses of the theorem. 2. Defines the field degree $h = [K : \mathbb{Q}]$, and bounds $m = 2h + 2$ and $n = q^2 / (2m)$ to control the dimensions of the linear system. 3. Defines $c_1$, a natural number chosen so that $c_1 \alpha$, $c_1 \beta$, and $c_1 \gamma$ are algebraic integers in $K$. We prove numerous bounding and integrality lemmas (`isIntegral_c₁α`, `isInt_β_bound`, etc.). 4. Formalizes the core algebraic coefficients $(a+b\beta)^k \alpha^{al} \gamma^{bl}$ which appear in the evaluation of the derivatives of the auxiliary function $R(x)$. 5. By scaling the system by $c_1^{n-1+2mq}$, we successfully restrict the entries of our linear system matrix `A` entirely to the ring of integers $\mathcal{O}_K$, preparing it for the application of Siegel's lemma. 6. House Bounds (`c₂`) : Establishes the foundational base integer $c_2$ to bound the absolute values of the conjugates (houses) of our coefficients. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory new-contributor 913/49 Mathlib.lean,Mathlib/NumberTheory/NumberField/House.lean,Mathlib/NumberTheory/Transcendental/GelfondSchneider/MainAlg.lean,Mathlib/RingTheory/IntegralClosure/Algebra/Basic.lean 4 16 ['github-actions', 'mkaratarakis', 'tb65536'] tb65536
assignee:tb65536
12-44020
12 days ago
12-44075
12 days ago
25-24500
25 days
37644 matthunz
author:matthunz
 feat(Order/Causal): add `Causal` ordering for stream functions Adds `Causal` ordering for stream functions and related theorems: ```lean def Causal (f : Stream' α → Stream' β) : Prop := ∀ (x y : Stream' α) (t : ℕ), (∀ s, s ≤ t → x s = y s) → f x t = f y t ``` A stream function is causal if the output at time `t` depends only on inputs up to time `t`. Causal stream functions are commonly used in signal processing, reactive systems, and semantics of stateful computations, where outputs cannot depend on future inputs. ## Future work - Mealy machines: define Mealy machines as causal stream functions with state, and relate them to standard automata-theoretic constructions. - Feedback and delay operators: formalize feedback loops and delayed composition, enabling modeling of stateful and recursive stream definitions. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-order 79/0 Mathlib.lean,Mathlib/Order/Causal/Basic.lean,Mathlib/Order/Causal/Defs.lean 3 2 ['github-actions'] nobody
12-26859
12 days ago
unknown
0-0
0 seconds
37376 NoneMore
author:NoneMore
 feat(Topology/CantorBendixson): add iterated derived sets and perfect kernel Define the transfinite iteration of the relative derived-set operator via `gfpApprox` and introduce the perfect kernel of a set. --- AI disclosure: Most declarations, comments, and documentation in this PR were generated with Codex. Some proofs were structurally simplified using the `/golf` command from Lean 4 Skills. I reviewed the resulting code and documentation and can vouch for all submitted content. - [ ] depends on: #37374 - [x] depends on: #37375 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor blocked-by-other-PR 249/0 Mathlib.lean,Mathlib/SetTheory/Ordinal/FixedPointApproximants.lean,Mathlib/Topology/CantorBendixson.lean,Mathlib/Topology/DerivedSet.lean 4 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
11-42550
11 days ago
17-46196
17 days ago
0-832
13 minutes
36889 KryptosAI
author:KryptosAI
 feat(LinearAlgebra/Matrix/MoorePenrose): define the Moore-Penrose pseudo-inverse Defines `IsMoorePenroseInverse` and constructs the Moore-Penrose pseudo-inverse for matrices over `RCLike` fields. Closes #24787. `Defs.lean` defines the predicate using the heterogeneous four-condition characterization from the issue, plus uniqueness for semigroups with `StarMul`. `Basic.lean` constructs the inverse via orthogonal projection and `ker(f)ᗮ ≃ₗ range(f)`, then proves: ```lean theorem exists_isMoorePenroseInverse (A : Matrix m n 𝕜) : ∃ (As : Matrix n m 𝕜), IsMoorePenroseInverse A As def moorePenroseInverse (A : Matrix m n 𝕜) : Matrix n m 𝕜 lemma moorePenroseInverse_conjTranspose : moorePenroseInverse (Aᴴ) = (moorePenroseInverse A)ᴴ lemma moorePenroseInverse_eq_nonsing_inv (hA : IsUnit A) : moorePenroseInverse A = A⁻¹ ``` ### AI disclosure - **Gemini 2.5 Pro**: proof planning, initial code, edits - **Claude Code (Opus 4.6)**: debugging, compilation, type-checking against mathlib4 I reviewed and directed all changes. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor LLM-generated
label:t-algebra$
 402/0 Mathlib.lean,Mathlib/LinearAlgebra/Matrix/MoorePenrose/Basic.lean,Mathlib/LinearAlgebra/Matrix/MoorePenrose/Defs.lean 3 29 ['KryptosAI', 'eric-wieser', 'github-actions', 'themathqueen', 'vihdzp'] ocfnash
assignee:ocfnash
10-48495
10 days ago
14-6806
14 days ago
25-39869
25 days
37666 TJHeeringa
author:TJHeeringa
 feat(Analysis/InnerProductSpace/Reproducing): Lipschitz wrt the kernel pseudometric --- RKHSs $H$ have bounded point evaluations. This induces a pseudometric on the underlying space `X`. The function $f\in H$ are Lipschitz continuous with Lipschitz constant $\||f\||$. This PR puts the pseudometric instance inline. The instance cannot just be put outside the theorem, because that gives problems with resolving type classes / instance synthesis. An alternative to inlining the instance is a type class synonym. One copy would be the RKHS with whatever metric X came equipped with and one copy would be the RKHS with the induced metric. Since there are likely more theorems depending on this pseudometric, I suspect that it is actually a better solution. AI: I had the instance outside the theorem. Lean gave problems with resolving type classes / instance synthesis. I asked Claude and ChatGPT to interpret the error and fix it. The latter just spit gibberish and the former suggested inlining but in a way that didn't work. Then, I asked on Zulip and got the same suggestion but working. The type synonym alternative was also suggested there. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis new-contributor help-wanted 20/3 Mathlib/Analysis/InnerProductSpace/Reproducing.lean 1 3 ['TJHeeringa', 'github-actions'] nobody
10-43616
10 days ago
unknown
0-0
0 seconds
34815 Deep0Thinking
author:Deep0Thinking
 feat(Analysis/SpecialFunctions/ImproperIntegrals): Frullani integral - [x] depends on: #34966 --- Add a proof of **Frullani integral**. Main theorems: - `Frullani.integral_Ioi` - `IntegrableOn.tendsto_integral_Ioi` - `exists_integral_div_eq_mul_log` Supporting lemmas: - `Frullani.comp_mul_left_div` - `Frullani.intervalIntegrable_div` - `Frullani.exists_integral_div_eq_mul_log` - `Ioi_diff_Ioc` - `ContinuousOn.comp_mul_left_div`, `ContinuousOn.comp_mul_right_div` - `ContinuousOn.comp_mul_left`, `ContinuousOn.comp_mul_right` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor large-import t-analysis awaiting-author 188/2 Mathlib/Analysis/SpecialFunctions/ImproperIntegrals.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/MeanValue.lean,Mathlib/Topology/Algebra/GroupWithZero.lean,Mathlib/Topology/Algebra/Monoid.lean 4 9 ['CoolRmal', 'Deep0Thinking', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'sgouezel'] urkud
assignee:urkud
10-38248
10 days ago
10-59874
10 days ago
6-41371
6 days
37707 MavenRain
author:MavenRain
 feat(Combinatorics/SimpleGraph): add IsMaximalClique/IsMaximalIndepSet, refactor IsMaximum* to MaximalFor Addresses #34962 new-contributor t-combinatorics 92/31 Mathlib/Combinatorics/SimpleGraph/Clique.lean,MathlibTest/ClearUnneeded.lean 2 2 ['github-actions'] nobody
10-30255
10 days ago
10-29789
10 days ago
0-1002
16 minutes
37695 Morten-Ness
author:Morten-Ness
 refactor(GroupTheory/Complement): simplify complement proofs Simplifies the proofs of: - `Subgroup.IsComplement'.symm` - `Subgroup.isComplement_singleton_left` - `Subgroup.isComplement_singleton_right` No API changes. AI assistance: I used Codex/LLM suggestions as a starting point, then manually checked the proofs, and verified the final version locally. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-group-theory new-contributor awaiting-author 15/17 Mathlib/GroupTheory/Complement.lean 1 4 ['github-actions', 'tb65536'] tb65536
assignee:tb65536
9-68549
9 days ago
9-68549
9 days ago
0-68801
19 hours
37489 michael-novak-math
author:michael-novak-math
 feat: add the fundamental theorem of plane curves We add to the PlaneCurves file created in PR #36731 a classical result in the subject of differential geometry of plane curves: the fundamental theorem of plane curves. --------- - [ ] depends on: #36731 new-contributor t-differential-geometry t-analysis blocked-by-other-PR 651/0 Mathlib.lean,Mathlib/Analysis/InnerProductSpace/Calculus.lean,Mathlib/Geometry/PlaneCurves.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/FundThmCalculus.lean,docs/references.bib 5 5 ['github-actions', 'mathlib-dependent-issues', 'michael-novak-math'] nobody
9-59129
9 days ago
15-43985
15 days ago
0-13581
3 hours
37716 slavanaprienko
author:slavanaprienko
 feat(LinearAlgebra/Matrix/Determinant): Desnanot-Jacobi identity This PR adds the Desnanot-Jacobi identity (also known as the Lewis Carroll identity or Dodgson condensation): for any (n+2)×(n+2) matrix M over a commutative ring, $$\det(M) \cdot \det(M_{1,n}^{1,n}) = \det(M_1^1) \cdot \det(M_n^n) - \det(M_1^n) \cdot \det(M_n^1)$$ The proof follows Bressoud's *Proofs and Confirmations* (Cambridge University Press, 1999): multiply M by an auxiliary matrix built from columns of the adjugate, then compare determinants. This yields the identity premultiplied by det(M). To cancel, we pass to a universal polynomial ring (an integral domain with nonzero determinant), then specialize back to arbitrary commutative rings. It seems there's some interest in adding this: https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Determinantal.20identity.20and.20the.20Cauchy.20matrix.20determinant/with/582946873 --- t-algebra new-contributor awaiting-author
label:t-algebra$
 252/0 Mathlib.lean,Mathlib/LinearAlgebra/Matrix/Determinant/DesnanotJacobi.lean 2 7 ['github-actions', 'grunweg', 'slavanaprienko'] nobody
9-39133
9 days ago
9-72178
9 days ago
0-32821
9 hours
37075 SproutSeeds
author:SproutSeeds
 feat: extend `@[reassoc]` to `LinearMap` Closes #34342. This follows the collaborator notes from the issue thread by keeping the `LinearMap` `@[reassoc]` extension out of `CategoryTheory` and by splitting the relevant universes instead of forcing the codomain universes to coincide. Summary: - add `Mathlib.Tactic.LinearMapReassoc` - extend the existing `@[reassoc]` machinery to generate `_assoc` lemmas for equalities of linear maps - fold the coverage into `MathlibTest/CategoryTheory/Reassoc.lean` Verification: - `COPYFILE_DISABLE=1 ~/.elan/bin/lake build Mathlib.Tactic.LinearMapReassoc MathlibTest.CategoryTheory.Reassoc` - `COPYFILE_DISABLE=1 ~/.elan/bin/lake build Mathlib.Tactic` t-meta new-contributor awaiting-author LLM-generated 104/5 Mathlib.lean,Mathlib/LinearAlgebra/TensorProduct/Basic.lean,Mathlib/Tactic.lean,Mathlib/Tactic/LinearMapReassoc.lean,MathlibTest/CategoryTheory/Reassoc.lean 5 13 ['JovanGerb', 'SproutSeeds', 'github-actions', 'themathqueen'] nobody
9-31271
9 days ago
21-4687
21 days ago
2-74348
2 days
36313 SproutSeeds
author:SproutSeeds
 feat(Inversion): cobounded tendsto near center Part of #5939 Add `tendsto_inversion_nhdsNE_center_cobounded` in `Mathlib/Geometry/Euclidean/Inversion/Basic.lean`, proving `Tendsto (inversion c R) (𝓝[≠] c) (Bornology.cobounded P)` for `R ≠ 0`. Tools used: Codex 5.3 extra high --- Happy to adjust naming, placement, or proof style based on maintainer preference. t-euclidean-geometry new-contributor LLM-generated awaiting-author 42/0 Mathlib/Geometry/Euclidean/Inversion/Basic.lean 1 9 ['SproutSeeds', 'github-actions', 'jsm28', 'kbuzzard', 'ocfnash'] jsm28
assignee:jsm28
9-26535
9 days ago
23-60954
23 days ago
6-36700
6 days
35755 Vilin97
author:Vilin97
 feat(Analysis/ODE): forward Euler method convergence WIP Prove the convergence of the Forward Euler Method. This is the first theorem in most textbooks on numerical analysis for ODEs. --- The initial proof was produced by [Aristotle](https://aristotle.harmonic.fun). The code was then iteratively refined (factoring out lemmas, golfing, simplifying proofs) using Claude Code (Claude Opus 4.6). * [ ] Depends on #35753 new-contributor WIP LLM-generated merge-conflict 297/0 Mathlib.lean,Mathlib/Analysis/ODE/EulerMethod.lean,Mathlib/Topology/Algebra/Order/Floor.lean,Mathlib/Topology/Algebra/Order/PiecewiseLinear.lean 4 4 ['github-actions', 'mathlib-merge-conflicts'] nobody
9-14185
9 days ago
50-70652
50 days ago
0-674
11 minutes
36698 ghseeli
author:ghseeli
 feat(Combinatorics/Enumerative): Latin squares This PR defines Latin rectangles and Latin squares and proves an extension theorem using Hall's Marriage Theorem. ## Main results - `group_to_cayley_table`: every finite group `G` yields a `LatinSquare G G`. - `latin_rectangle_extends_one_row`: a (non-square) `LatinRectangle` extends to a `LatinRectangle` with one more row. This is an application of **Hall's Marriage Theorem**, `hallMatchingsOn.nonempty`. - `latin_rectangle_extends_to_latin_square`: a `LatinRectangle` extends to a `LatinSquare`. This is included in a new file `Combinatorics/Enumerative/LatinSquare.lean`. --- - [ ] depends on: #37190 - [ ] depends on: #37720 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics blocked-by-other-PR 642/0 Mathlib.lean,Mathlib/Combinatorics/Enumerative/DoubleCounting.lean,Mathlib/Combinatorics/Enumerative/LatinSquare.lean,Mathlib/Combinatorics/Pigeonhole.lean,Mathlib/Data/Fintype/Card.lean,docs/references.bib 6 78 ['SnirBroshi', 'cjrl', 'eric-wieser', 'ghseeli', 'github-actions', 'mathlib-dependent-issues', 'vlad902'] nobody
9-10716
9 days ago
13-34443
13 days ago
16-40743
16 days
36849 mike1729
author:mike1729
 feat(Analysis/Normed/Module/SchauderBasis): basic sequences and Grünblum criterium This PR introduces the theory of basic sequences in Banach spaces, following Albiac–Kalton. Defines basic sequences in normed spaces, and prove the classical Grünblum criterium for recognizing them. ### Main Definitions - `IsBasicSequence`: A `Prop` asserting that initial partial sums of `e` are bounded by `K` times the full partial sum. - `IsBasicSequence.toSchauderBasis`: Constructs a `SchauderBasis` on the algebraic span of a nonzero basic sequence. ### Main Results - `IsBasicSequence.linearIndependent`: A nonzero basic sequence is linearly independent. - `IsBasicSequence.coe_toSchauderBasis_apply`: The `n`-th basis vector of the constructed Schauder basis coerces to `e n` in the ambient space. - `IsBasicSequence.enormProjBound_le`: The projection bound of the constructed basis is at most `ENNReal.ofReal K`. --- - follow up to : #34209 - blocks : #35473 The next planned PRs: - general selection principle for basic sequences - characterization when a set contains a basic sequence in terms of weak closure and compactness - Eberlein–Šmulian theorem - weakly compact subsets of a Banach space are Fréchet–Urysohn spaces [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed t-analysis new-contributor 278/1 Mathlib.lean,Mathlib/Analysis/Normed/Module/SchauderBasis/Basic.lean,Mathlib/Analysis/Normed/Module/SchauderBasis/BasicSequence.lean 3 7 ['github-actions', 'j-loreaux', 'mike1729'] sgouezel
assignee:sgouezel
8-63916
8 days ago
8-66624
8 days ago
28-7114
28 days
37800 dtumad
author:dtumad
 feat(Probability): Add definition of `SPMF` based on existing `PMF` This PR adds a definition of `SPMF A` based on the existing `PMF A` definition, and adds basic monadic operations on them. --- There's a few different projects now using a definition along these lines so it would be good to align things. I tried to just port just the most basic things for now until the definitions can be agreed on. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor 231/0 Mathlib.lean,Mathlib/Probability/ProbabilityMassFunction/Basic.lean,Mathlib/Probability/ProbabilityMassFunction/Constructions.lean,Mathlib/Probability/ProbabilityMassFunction/Monad.lean,Mathlib/Probability/ProbabilityMassFunction/SPMF.lean,Mathlib/Topology/Algebra/InfiniteSum/Basic.lean 6 2 ['github-actions'] nobody
8-53277
8 days ago
8-53341
8 days ago
8-55047
8 days
37281 AltSoKoly
author:AltSoKoly
 Update EdgeConnectivity.lean --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor awaiting-author 123/0 Mathlib/Combinatorics/SimpleGraph/Connectivity/EdgeConnectivity.lean,Mathlib/Data/Int/GCD.lean 2 5 ['github-actions', 'grunweg', 'themathqueen'] nobody
8-47740
8 days ago
20-38503
20 days ago
0-432
7 minutes
37722 SabrinaJewson
author:SabrinaJewson
 feat(Order/Cover): intervals equal singletons iff To complement `Set.Icc_eq_singleton_iff`, this introduces: - `Set.Ioc_eq_singleton_iff` - `Set.Ico_eq_singleton_iff` - `Set.Ioi_eq_singleton_iff` - `Set.Iio_eq_singleton_iff` - `Set.Ioo_eq_singleton_iff` Unforunately because of the order of the ands, the last cannot be made self-dual. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order new-contributor 39/0 Mathlib/Order/Cover.lean 1 3 ['github-actions', 'mathlib-merge-conflicts'] nobody
8-12320
8 days ago
8-12344
8 days ago
9-85495
9 days
37819 YellPika
author:YellPika
 feat(Order/OmegaCompletePartialOrder): add `OmegaCompletePartialOrder` instance for `WithBot` with basic `ωScottContinuous` lemmas This is a modification of #34093. See #34093 for details. --- - [x] depends on: #33941 - [x] depends on: #37258 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor 337/10 Mathlib/Algebra/Order/Ring/WithTop.lean,Mathlib/Analysis/BoxIntegral/Box/Basic.lean,Mathlib/Order/Monotone/Basic.lean,Mathlib/Order/OmegaCompletePartialOrder.lean,Mathlib/Order/TypeTags.lean,Mathlib/Order/WithBot.lean 6 3 ['github-actions', 'mathlib-dependent-issues'] Komyyy
assignee:Komyyy
8-4205
8 days ago
8-4248
8 days ago
8-8055
8 days
26165 oliver-butterley
author:oliver-butterley
 feat(MeasureTheory.VectorMeasure): add lemma which shows that variation of a `ℝ≥0∞` VectorMeasure is equal to itself Add a lemma for the variation of a VectorMeasure which tells that if `μ` is `VectorMeasure X ℝ≥0∞` then `variation μ = μ`. Co-authored-by: @yoh-tanimoto - [ ] depends on: #26160 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict new-contributor t-measure-probability awaiting-author 467/0 Mathlib.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Defs.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Lemmas.lean 3 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot'] nobody
7-78549
7 days ago
285-67438
285 days ago
15-66224
15 days
32546 anishrajeev
author:anishrajeev
 feat(ModelTheory): Prove compactness of the type space Define the space of types and prove various topological properties of it (zero dimensional, totally separated, compact, baire). The goal is to formalize the proof of the Omitting Types Theorem - [ ] depends on: #32215 t-logic new-contributor large-import 31/1 Mathlib/ModelTheory/Topology/Types.lean 1 12 ['NoneMore', 'anishrajeev', 'fpvandoorn', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] fpvandoorn
assignee:fpvandoorn
7-64885
7 days ago
8-82945
8 days ago
12-80893
12 days
37010 pion2024
author:pion2024
 `Sl2`update: add theorem `finrank_weightSpace_eq_one_of_isIrreducible` # Background: I am a 2nd year undergrad student in mathematics currently self-teaching Lie algebra and representation theory. Before starting the formalization, I searched for related keywords on Zulip and in the GitHub issues and commits. As far as I could tell, there were no existing results or ongoing attempts before I started. All feedback is welcome. Even a quick check on the statement design/an idea on the generalization (cf Limitations below) would be incredibly helpful. # Overview In this PR, I added the new section `IsAlgClosedIrreducible` which formalizes the well-known theorem `finrank_weightSpace_eq_one_of_isIrreducible` for the Lie algebra $\mathfrak{sl}_2$ step by step. It proves that for a finite-dimensional irreducible representation of $\mathfrak{sl}_2$ over an algebraically closed field $K$ of characteristic zero, every non-trivial weight space has a dimension of exactly 1. # Formalization Structure : Instead of relying on explicit finite sums (`Finset.sum`) and manipulating coefficients, I heavily leverage Mathlib's abstractions in Submodule Lattice Theory and Coordinate-free Linear Algebra. The formalization proceeds in the following logic: 1. Existence of a Primitive Vector (`exists_primitiveVector`): I construct a primitive (highest-weight) vector by showing that repeated applications of the raising operator $e$ must eventually yield zero due to the finite-dimensionality of $M$ and the linear independence of eigenvectors corresponding to distinct eigenvalues. 2. The span of $f$-Tower as a Lie Submodule equals to the whole space (`fTowerLieSubmodule_eq_top`): I define the $f$-tower submodule as the $K$-span of $\{f^k m \mid k \in \mathbb{N}\}$. By proving its closure under the action of $f, h$, and $e$, I establish it as a Lie submodule. Since $M$ is irreducible, this submodule must be the entire space ($\top$). 3. Submodule Lattice Operations (`exists_mem_fTower_of_weightSpace_ne_bot`): To prove that every weight in $M$ is of the form $\mu_0 - 2k$, I use lattice operations (iSup, inf, and Disjoint) to avoid element-wise tracking. Since the $f$-tower spans $M$, the supremum of its weight spaces is $\top$. By leveraging `Module.End.eigenspaces_iSupIndep`, I show that any arbitrary non-trivial weight space would have a trivial intersection with $\top$ if its weight didn't belong to the sequence, yielding a contradiction. 4. Dimension Calculation via Basis Equivalence (`finrank_weightSpace_eq_one_of_isIrreducible`): Finally, I construct a basis from the non-zero elements of the $f$-tower. To show the weight space is 1-dimensional, I use `Basis.equivFun` to compare coefficients algebraically. This avoids heavy manual indexing and index-shifting, proving that any vector in the weight space $\mu_0 - 2k$ is merely a scalar multiple of $f^k m$. # Use of AI: I used Gemini 3.1 Pro for tactics, theorems, improvement suggestions, and error explanations. I fully understand and can vouch for all the modifications I have made to the file. # Limitations: I only managed to formalize the finite-dimensional version, although the theorem also holds in the infinite-dimensional case. In the infinite case the existence of a primitive vector is not guaranteed. A quick search suggests that we might need heavy tools like Casimir operators and the universal enveloping algebra, which are totally beyond my current level. I am looking into it, but since there is a significant mathematical gap, I thought it would be best to get this finite-dimensional version merged first. new-contributor t-algebra large-import awaiting-author
label:t-algebra$
 336/0 Mathlib/Algebra/Lie/Sl2.lean 1 9 ['github-actions', 'mathlib-bors', 'mathlib-merge-conflicts', 'ocfnash', 'pion2024'] ocfnash
assignee:ocfnash
7-62296
7 days ago
15-43633
15 days ago
2-57577
2 days
37698 Qulinecier
author:Qulinecier
 feat: add TendstoInDistribution.continuousOn_comp_prodMk_of_tendstoInMeasure_const This PR adds `TendstoInDistribution.continuousOn_comp_prodMk_of_tendstoInMeasure_const`, a generalization of the existing `TendstoInDistribution.continuous_comp_prodMk_of_tendstoInMeasure_const` (Slutsky's theorem) to functions that are only continuous on a closed subset `s` of the domain, rather than everywhere. This is useful when `g` is only well-behaved on a proper closed subset, such as division (away from zero) or logarithm (on the positive reals), where the previous version requiring global continuity was not applicable. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor 92/0 Mathlib/MeasureTheory/Function/ConvergenceInDistribution.lean 1 2 ['github-actions'] nobody
7-58938
7 days ago
10-47625
10 days ago
10-47614
10 days
37456 Robertboy18
author:Robertboy18
 feat(LinearAlgebra/AffineSpace): add Desargues's theorem This PR adds an affine (parallel) version of Desargues's theorem! **Main changes** - New file `Mathlib/LinearAlgebra/AffineSpace/Desargues.lean` with `parallel_third_side_of_perspective`: if two triangles are in perspective from a point `S` and two pairs of corresponding sides are parallel, then the third pair of sides is parallel. - Add the corresponding `public import` to `Mathlib.lean`. - Update `docs/100.yaml` (entry #87) to point to the new declaration. **High level Proof idea is from the rocq repository!** Compare side vectors via `exists_eq_smul_of_parallel` for the two given pairs of parallel sides; the shared comparison along `SA` forces the same scalar, yielding parallelism of the third sides. Tests: `lake build Mathlib.LinearAlgebra.AffineSpace.Desargues`! t-algebra new-contributor awaiting-author
label:t-algebra$
 159/0 Mathlib.lean,Mathlib/LinearAlgebra/AffineSpace/Desargues.lean,docs/100.yaml 3 8 ['Robertboy18', 'SnirBroshi', 'copilot-pull-request-reviewer', 'github-actions', 'wwylele'] eric-wieser
assignee:eric-wieser
7-48333
7 days ago
7-48333
7 days ago
8-72313
8 days
34375 jvanwinden
author:jvanwinden
 feat(MeasureTheory/Function/AEEqOfLIntegral): introduce lemmas for rewriting a.e. inequalities Introduce the following lemmas: - ae_le_const_iff_forall_gt_imp_ae_lt, - ae_const_le_iff_forall_lt_imp_ae_gt, - ae_le_const_iff_forall_gt_imp_ae_le, - ae_const_le_iff_forall_lt_imp_ae_ge, which can be used get an epsilon of room in a.e. inequalities, with the epsilon being outside the a.e. quantifier. The 'le/ge' variants require a dense ordering. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-measure-probability 31/44 Mathlib/MeasureTheory/Function/AEEqOfLIntegral.lean,Mathlib/Topology/Order/LiminfLimsup.lean 2 13 ['EtienneC30', 'github-actions', 'jvanwinden', 'urkud'] kex-y
assignee:kex-y
7-30346
7 days ago
7-36691
7 days ago
48-41557
48 days
37683 SabrinaJewson
author:SabrinaJewson
 feat(Order/OrdContinuous): every map between complete lattices that preserves sSup is a left adjoint of some Galois connection It is already proven that the left side of a Galois connection is left-continuous; this provides the converse. --- - [ ] depends on: #37682 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor blocked-by-other-PR merge-conflict 90/136 Mathlib/Order/ConditionallyCompleteLattice/Basic.lean,Mathlib/Order/ConditionallyCompletePartialOrder/Defs.lean,Mathlib/Order/OrdContinuous.lean,Mathlib/Order/SemiconjSup.lean,Mathlib/Tactic/Translate/ToDual.lean,Mathlib/Topology/Order/Basic.lean 6 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
7-20093
7 days ago
11-7398
11 days ago
0-1447
24 minutes
37684 SabrinaJewson
author:SabrinaJewson
 feat(Topology/Order): provide lemmas linking topological continuity to order continuity All the hard work is already done, but this just fills in a couple convenient missing pieces. --- - [ ] depends on: #37682 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor blocked-by-other-PR merge-conflict 106/136 Mathlib/Order/ConditionallyCompleteLattice/Basic.lean,Mathlib/Order/ConditionallyCompletePartialOrder/Defs.lean,Mathlib/Order/OrdContinuous.lean,Mathlib/Order/SemiconjSup.lean,Mathlib/Tactic/Translate/ToDual.lean,Mathlib/Topology/Order/Basic.lean,Mathlib/Topology/Order/IsLUB.lean,Mathlib/Topology/Order/Monotone.lean 8 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
7-20092
7 days ago
11-7399
11 days ago
0-1299
21 minutes
37682 SabrinaJewson
author:SabrinaJewson
 refactor(Order/OrdContinuous): redefine left and right order continuity to not require preserving ⊥/⊤ `LeftOrdContinuous` currently requires that `f ⊥ = ⊥`, but this means that many functions that are perhaps intuitively left-continuous (like `f x = x + 1` on `ℝ≥0`) are not. In particular, this change means that functions between conditionally complete lattices are `LeftOrdContinuous` iff they are monotone and topologically left continuous (see `MonotoneOn.map_csSup_of_continuousWithinAt` for the reverse direction). If one wants the concept that existed before, one can either accept the `f ⊥ = ⊥` hypothesis separately or, if the function is between complete lattices, use the left side of a `GaloisConnection` (which is equivalent, although I think this is not yet in Mathlib). This removes the definitional equality of the type in favour of a structure. Since most of the time users will be working with the `sSup` versions and not with `IsLUB`, I think this is justified. As a consequence, this removes the definitional equality between `LeftOrdContinuous` and `RightOrdContinuous` of the dual – the latter could be redefined to re-add this, but we do have conversion functions. `LeftOrdContinuous.continuousWithinAt_Iic` is rewritten to accomodate these changes; the superfluous `DenselyOrdered` assumption is also removed. [Zulip thread](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/LeftOrdContinuous.20requires.20f.28.E2.8A.A5.29.20.3D.20.E2.8A.A5/near/582932491) --- - [x] depends on: #37735 - [x] depends on: #37772 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-order 52/38 Mathlib/Order/OrdContinuous.lean,Mathlib/Order/SemiconjSup.lean,Mathlib/Topology/Order/Basic.lean 3 10 ['SabrinaJewson', 'astrainfinita', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vihdzp'] nobody
7-18577
7 days ago
7-18649
7 days ago
9-15747
9 days

PRs not into the master branch

Number Author Title Description Labels +/- Modified files (first 100) 📝 💬 All users who commented or reviewed Assignee(s) Updated Last status change total time in review
13158 erdOne
author:erdOne
 refactor(RingTheory/OreLocalization/Module): remove `LocalizedModule.mk`. --- - [x] depends on: #13151 - [ ] depends on: #13156 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra blocked-by-other-PR
label:t-algebra$
 49/48 Mathlib/RingTheory/OreLocalization/Basic.lean,Mathlib/RingTheory/OreLocalization/Module.lean 2 2 ['leanprover-community-mathlib4-bot', 'urkud'] nobody
94-85374
3 months ago
679-59442
679 days ago
9-15083
9 days
37059 thorimur
author:thorimur
 review: #36709 This review suggests - various improvements to the code structure + readability; pruning of unnecessary code - using `withCurrHeartbeats` instead of setting max heartbeats to 0 (and nothing at all in the `elabCommand` case, which should effectively start heartbeats afresh anyway) - not re-throwing `.internal` errors (does not touch unmodified sections of code that do the same) - hovers on names in the logged message + message newline fixes - another test, this time at the command level - `Name.lt` instead of `.quickLt` for human-readable sorting --- Targeting: https://github.com/leanprover-community/mathlib4/pull/36709 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 77/66 Mathlib/Tactic/DefEqAbuse.lean,MathlibTest/DefEqAbuse.lean 2 3 ['SnirBroshi', 'github-actions', 'thorimur'] kim-em
assignee:kim-em
20-51432
20 days ago
24-24770
24 days ago
24-25436
24 days
36582 kim-em
author:kim-em
 feat: run inferInstanceAs% normalization when deriving This PR intercepts `def ... deriving ...` and `deriving instance ... for ...` commands that use the delta deriving handler, and runs the `normalizeInstance` machinery from `inferInstanceAs%` on the synthesized instances. This fixes carrier type leakage at `reducibleAndInstances` transparency for all delta-derived instances across Mathlib. The implementation copies `mkInst` and `processDefDeriving` from `Lean.Elab.Deriving.Basic` (Lean 4.29.0-rc6) and adds the normalization step. This is intentionally a temporary copy: once we settle on the right behavior, it will be upstreamed into Lean 4. - [ ] depends on: #35950 🤖 Prepared with Claude Code large-import LLM-generated 353/3 Mathlib/Init.lean,Mathlib/Tactic/DerivingInferInstanceAs.lean,Mathlib/Tactic/InferInstanceAsPercent.lean,MathlibTest/DerivingInferInstanceAs.lean 4 2 ['github-actions', 'mathlib-dependent-issues'] nobody
14-78413
14 days ago
34-85519
34 days ago
0-218
3 minutes

PRs with an 'approved' review

Number Author Title Description Labels +/- Modified files (first 100) 📝 💬 All users who commented or reviewed Assignee(s) Approval(s) Updated Last status change total time in review
12608 eric-wieser
author:eric-wieser
 feat: allow `nsmul` / `zsmul` to be omitted again, with a warning --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra t-meta
label:t-algebra$
 118/2 Mathlib.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Tactic.lean,Mathlib/Tactic/DefaultFieldLinter.lean,scripts/noshake.json,test/default_field_linter.lean 6 12 ['YaelDillies', 'eric-wieser', 'fpvandoorn', 'github-actions'] nobody 1
624-70990
1 year ago
698-30977
698 days ago
5-74504
5 days
8519 eric-wieser
author:eric-wieser
 refactor(LinearAlgebra/TensorProduct): golf using `liftAddHom` This new `TensorProduct.liftAddHom` doesn't require bilinearity, only that scalar multiplication can be moved between the arguments. While in theory we only need the `AddMonoidHom` version as it offers exactly the same generality, we first provide an unbundled `liftFun` as this seems to give a sizeable performance boost if used in downstream `lift` variants. --- - [x] depends on: #8571 - [x] depends on: #8584 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 53/50 Mathlib/Algebra/Category/AlgebraCat/Monoidal.lean,Mathlib/LinearAlgebra/TensorProduct.lean,Mathlib/LinearAlgebra/TensorProduct/Tower.lean 3 28 ['bustercopley', 'eric-wieser', 'jcommelin', 'jjaassoonn', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'mathlib-bors'] nobody 1
624-70987
1 year ago
864-36350
864 days ago
5-6524
5 days
9146 laughinggas
author:laughinggas
 feat(Data/ZMod/Defs): Topological structure on `ZMod` Added a discrete topology structure to `ZMod n` for all `n` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra awaiting-author t-topology
label:t-algebra$
 55/3 Mathlib.lean,Mathlib/Topology/Algebra/Constructions.lean,Mathlib/Topology/Algebra/Group/Basic.lean,Mathlib/Topology/Instances/ZMod.lean,Mathlib/Topology/Maps.lean 5 61 ['YaelDillies', 'eric-wieser', 'github-actions', 'jcommelin', 'laughinggas', 'mo271', 'urkud'] nobody 1
624-70987
1 year ago
831-29078
831 days ago
7-11053
7 days
6403 astrainfinita
author:astrainfinita
 chore: change instance priorities of `Ordered*` hierarchy --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-order merge-conflict slow-typeclass-synthesis awaiting-author
label:t-algebra$
 253/79 Mathlib/Algebra/Order/CompleteField.lean,Mathlib/Algebra/Order/Field/Canonical/Defs.lean,Mathlib/Algebra/Order/Field/Defs.lean,Mathlib/Algebra/Order/Group/Defs.lean,Mathlib/Algebra/Order/Monoid/Basic.lean,Mathlib/Algebra/Order/Monoid/Canonical/Defs.lean,Mathlib/Algebra/Order/Monoid/Defs.lean,Mathlib/Algebra/Order/Monoid/WithZero/Defs.lean,Mathlib/Algebra/Order/Ring/Canonical.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Order/Ring/Star.lean,Mathlib/Algebra/Order/WithZero.lean,Mathlib/Analysis/InnerProductSpace/Orientation.lean,Mathlib/LinearAlgebra/Orientation.lean,Mathlib/RingTheory/HahnSeries.lean,Mathlib/RingTheory/LaurentSeries.lean,Mathlib/Tactic/Positivity/Core.lean,Mathlib/Topology/Algebra/WithZeroTopology.lean 18 39 ['Vierkantor', 'astrainfinita', 'digama0', 'eric-wieser', 'j-loreaux', 'leanprover-bot'] nobody 1
624-70985
1 year ago
869-23727
869 days ago
13-18399
13 days
12751 Command-Master
author:Command-Master
 feat: add lemmas for Nat/Bits, Nat/Bitwise and Nat/Size Remove `@[simp]` from `Nat.bit_false` and `Nat.bit_true`, as `bit0` and `bit1` are deprecated, and add some lemmas to `Bits`, `Bitwise` and `Size`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data new-contributor 66/7 Mathlib/Data/Nat/Bits.lean,Mathlib/Data/Nat/Bitwise.lean,Mathlib/Data/Nat/Multiplicity.lean,Mathlib/Data/Nat/Size.lean 4 26 ['Command-Master', 'Rida-Hamadani', 'Ruben-VandeVelde', 'YaelDillies', 'github-actions', 'jcommelin'] nobody 1
605-48287
1 year ago
640-54509
640 days ago
56-40668
56 days
15448 urkud
author:urkud
 chore(*): deprecate `Option.elim'` Use `Option.elim` instead. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author tech debt 54/50 Mathlib/Algebra/BigOperators/Option.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Algebra/MvPolynomial/Variables.lean,Mathlib/Analysis/BoxIntegral/Partition/Additive.lean,Mathlib/Analysis/BoxIntegral/Partition/Basic.lean,Mathlib/Analysis/BoxIntegral/Partition/Split.lean,Mathlib/Analysis/Calculus/LagrangeMultipliers.lean,Mathlib/CategoryTheory/Category/PartialFun.lean,Mathlib/Computability/TMToPartrec.lean,Mathlib/Data/Option/Defs.lean,Mathlib/LinearAlgebra/Basis.lean,Mathlib/Logic/Embedding/Set.lean,Mathlib/Logic/Equiv/Basic.lean,Mathlib/MeasureTheory/OuterMeasure/Induced.lean,Mathlib/NumberTheory/Dioph.lean,Mathlib/Topology/Compactness/Paracompact.lean,Mathlib/Topology/LocallyFinite.lean 17 12 ['Ruben-VandeVelde', 'YaelDillies', 'github-actions', 'grunweg', 'urkud'] nobody 1
605-37340
1 year ago
614-83502
614 days ago
7-18420
7 days
13514 madvorak
author:madvorak
 feat(Computability/ContextFreeGrammar): closure under union - [ ] depends on: #15895 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability blocked-by-other-PR 448/4 Mathlib/Computability/ContextFreeGrammar.lean 1 50 ['Rida-Hamadani', 'YaelDillies', 'github-actions', 'leanprover-community-mathlib4-bot', 'madvorak'] nobody 1
530-64144
1 year ago
608-38125
608 days ago
72-28417
72 days
12133 ADedecker
author:ADedecker
 feat: generalize instIsLowerProd to arbitrary products Also change a bit the proof of the product case to match my own taste, feel free to tell if you prefer the old one. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-topology t-order 34/14 Mathlib/Topology/Constructions.lean,Mathlib/Topology/Order/LowerUpperTopology.lean 2 13 ['Ruben-VandeVelde', 'TwoFX', 'github-actions', 'jcommelin', 'mans0954', 'mathlib-bors', 'riccardobrasca'] nobody 2
517-70192
1 year ago
668-65828
668 days ago
63-69226
63 days
18461 hannahfechtner
author:hannahfechtner
 feat: left and right common multiples mixins add mixins for left and right common multiples. These carry the data of what factors are used to create the common multiples --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-algebra new-contributor
label:t-algebra$
 78/0 Mathlib/Algebra/Group/Defs.lean 1 13 ['github-actions', 'hannahfechtner', 'jcommelin', 'kbuzzard', 'kim-em', 'trivial1711'] nobody 1
451-66659
1 year ago
451-66659
451 days ago
69-24210
69 days
2605 eric-wieser
author:eric-wieser
 chore: better error message in linarith On this mwe: ```lean import Mathlib.Tactic.Linarith example (s : Set ℕ) (h : s = s) : 0 ≤ 1 := by linarith ``` this now indicates where the internal error is coming from. Is there a better way of chaining errors than this? --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-meta 12/1 Mathlib/Tactic/Linarith/Preprocessing.lean 1 3 ['Vierkantor', 'harahu', 'kim-em', 'mo271'] nobody 1
441-48679
1 year ago
1088-80218
1088 days ago
51-42225
51 days
19425 hrmacbeth
author:hrmacbeth
 perf: gcongr forward-reasoning adjustment This PR changes the "forward-reasoning" component of `gcongr`, rendering it more efficient, particularly in problems with a large number of variables/hypotheses in the context. Previously `gcongr` attempted to match *every* `LocalDecl` against *every* node in the parse tree using *each* of the five implemented `@[gcongr_forward]` mini-tactics: matching directly, matching after applying `symm`, matching after applying `le_of_lt`, etc etc. The new algorithm filters out the non-Prop `LocalDecl`s, and also adjusts the `@[gcongr_forward]` extensions so that, rather than re-apply the relevant lemmas (`symm`, `le_of_lt`, etc) at every node in the parse tree, the lemmas are applied in advance to the `LocalDecl`s and the result (if successful) stored. The performance effect on mathlib as a whole is miniscule, but it speeds up the profiler's count of "tactic execution of Mathlib.Tactic.GCongr" in the newly-added test from 257 ms to 47 ms, and has a similar effect on real-life examples in an analysis project of mine. Co-authored-by: Mario Carneiro --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) (Note that Mario provided the ideas but not the code, so please review with appropriate diligence!) merge-conflict awaiting-author 130/59 Mathlib/Order/Lattice.lean,Mathlib/Tactic/GCongr/Core.lean,Mathlib/Tactic/GCongr/ForwardAttr.lean,MathlibTest/GCongr/inequalities.lean 4 17 ['Vierkantor', 'github-actions', 'hrmacbeth', 'leanprover-bot', 'leanprover-community-bot-assistant'] Vierkantor
assignee:Vierkantor
 1
371-65041
1 year ago
504-53458
504 days ago
1-41769
1 day
19315 quangvdao
author:quangvdao
 feat(Data/Finsupp/Fin): Add `Finsupp` operations on `Fin` tuple This PR adds more analogues of operations on `Fin` tuples to the `Finsupp` setting. Before, there were only `Finsupp.cons` and `Finsupp.tail`. Now there are also `Finsupp.snoc`, `Finsupp.insertNth`, `Finsupp.init`, and `Finsupp.removeNth`. These all come with supporting lemmas. I also removed the porting comment about `succAboveCases` in `Data/Fin/Basic`, and added a lemma about `succAbove` in `Data/Fin/Tuple/Basic`. --- - [x] depends on: #20361 - [x] depends on: #20771 - [x] depends on: #20770 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-data 193/16 Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Algebra/BigOperators/Finsupp.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Data/Finsupp/Fin.lean,Mathlib/RingTheory/MvPolynomial/Homogeneous.lean,scripts/nolints_prime_decls.txt 6 44 ['YaelDillies', 'github-actions', 'j-loreaux', 'kbuzzard', 'mathlib4-dependent-issues-bot', 'quangvdao'] nobody 1
345-21646
11 months ago
422-46669
422 days ago
43-81252
43 days
21276 GabinKolly
author:GabinKolly
 feat(ModelTheory/Substructures): define equivalences between equal substructures Define first-order equivalences between equal substructures, and prove related properties. --- This is some preparatory work for #18876 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-logic 62/0 Mathlib/ModelTheory/Substructures.lean 1 19 ['GabinKolly', 'YaelDillies', 'fpvandoorn', 'github-actions', 'grunweg'] nobody 1
342-39720
11 months ago
342-39720
342 days ago
46-55730
46 days
25401 digama0
author:digama0
 feat(Util): SuppressSorry option See also leanprover/lean4#8611 and [#lean4 > Silent sorry @ 💬](https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/Silent.20sorry/near/503537964). This is a stop-gap solution while leanprover/lean4#8611 is underway, but it works about as well as any other built in option. Hooking declaration elaborators turns out to be a very powerful technique. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta 342/0 Mathlib.lean,Mathlib/Util/CommandElabHook.lean,Mathlib/Util/SuppressSorry.lean,MathlibTest/suppressSorry.lean 4 15 ['digama0', 'eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot'] alexjbest
assignee:alexjbest
 1
246-16108
8 months ago
246-16108
246 days ago
71-28496
71 days
28150 Equilibris
author:Equilibris
 chore: clean up proofs typevec proofs While adding variable universe corecs I found a lot of theorems in typevec that could do with a bit of a clean-up --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data new-contributor 24/26 Mathlib/Data/TypeVec.lean 1 7 ['Equilibris', 'alexkeizer', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody 1
237-16030
7 months ago
237-16031
237 days ago
13-49738
13 days
26462 PSchwahn
author:PSchwahn
 feat(LinearAlgebra/Projection): add results about inverse of `Submodule.prodEquivOfIsCompl` Add two theorems `Submodule.prodEquivOfIsCompl_symm_apply` and `Submodule.prodEquivOfIsCompl_symm_add`, which are API for `Submodule.prodEquivOfIsCompl`. We believe these theorems are useful; for example, we have used their statements in a [classification formalization project](https://github.com/LieLean/LowDimSolvClassification). Co-authored by: - [Viviana del Barco](https://github.com/vdelbarc) - [Gustavo Infanti](https://github.com/GuQOliveira) - [Exequiel Rivas](https://github.com/erivas) --- I am not sure whether the `prodEquivOfIsCompl_symm_apply` theorem should be tagged with `@[simp]`; this might lead to confluence issues. Opinions are welcome! [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-algebra new-contributor
label:t-algebra$
 10/0 Mathlib/LinearAlgebra/Projection.lean 1 7 ['PSchwahn', 'github-actions', 'joelriou', 'kckennylau'] joelriou
assignee:joelriou
 1
220-14711
7 months ago
220-45814
220 days ago
73-43082
73 days
27937 madvorak
author:madvorak
 feat(Logic/Basic): `congr_heq₂` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-logic 6/0 Mathlib/Logic/Basic.lean 1 8 ['YaelDillies', 'fpvandoorn', 'github-actions', 'madvorak', 'vihdzp'] fpvandoorn
assignee:fpvandoorn
 1
211-65050
6 months ago
237-65835
237 days ago
17-62721
17 days
21950 erdOne
author:erdOne
 feat(NumberTheory/Padics): the completion of `ℚ` at a finite place is `ℚ_[p]` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-number-theory 253/1 Mathlib.lean,Mathlib/Algebra/GroupWithZero/WithZero.lean,Mathlib/NumberTheory/Padics/HeightOneSpectrum.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/Topology/Algebra/Valued/WithVal.lean,Mathlib/Topology/Algebra/WithZeroMulInt.lean,Mathlib/Topology/Algebra/WithZeroTopology.lean 7 33 ['Ruben-VandeVelde', 'erdOne', 'faenuccio', 'github-actions', 'leanprover-community-bot-assistant', 'pechersky', 'smmercuri', 'xroblot'] nobody 1
202-48564
6 months ago
283-48501
283 days ago
73-13048
73 days
26330 Timeroot
author:Timeroot
 feat: "Junk value" test file This PR continues the work from #25173. Original PR: https://github.com/leanprover-community/mathlib4/pull/25173 awaiting-author t-data 360/0 MathlibTest/Junk.lean 1 17 ['SnirBroshi', 'Timeroot', 'bryangingechen', 'github-actions', 'leanprover-community-bot-assistant', 'madvorak', 'pechersky', 'vihdzp'] pechersky
assignee:pechersky
 2
199-5891
6 months ago
199-5891
199 days ago
48-73998
48 days
27302 tristan-f-r
author:tristan-f-r
 feat(Fintype/Quotient): finLiftOn₂ The combination of [`Quotient.finLiftOn`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Data/Fintype/Quotient.html#Quotient.finLiftOn) and [`liftOn₂`](https://leanprover-community.github.io/mathlib4_docs/Init/Core.html#Quotient.liftOn%E2%82%82). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-data 19/0 Mathlib/Data/Fintype/Quotient.lean 1 12 ['github-actions', 'kckennylau', 'pechersky', 'tristan-f-r', 'vihdzp'] pechersky
assignee:pechersky
 2
182-83051
6 months ago
182-83051
182 days ago
6-6533
6 days
28925 grunweg
author:grunweg
 chore: remove `linear_combination'` tactic When `linear_combination` was refactored in #15899, the old code was kept as the `linear_combination'` tactic, for easier migration. The consensus of the zulip discussion ([#mathlib4 > Narrowing the scope of `linear_combination` @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Narrowing.20the.20scope.20of.20.60linear_combination.60/near/470237816)) was to wait, and "revisit this once people have experienced the various tactics in practice". One year later, the old tactic has almost no uses: it is unused in mathlib; [searching on github](https://github.com/search?q=linear_combination%27%20path%3A*.lean&type=code) yields 37 hits --- all of which are in various forks of mathlib. Thus, removing this tactic seems appropriate. --- Do not merge before the zulip discussion has concluded! [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict file-removed awaiting-zulip 0/564 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/LinearCombination'.lean,Mathlib/Tactic/Linter/UnusedTactic.lean,MathlibTest/linear_combination'.lean 5 4 ['euprunin', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] nobody 1
182-78127
6 months ago
234-23524
234 days ago
0-1
1 second
28737 astrainfinita
author:astrainfinita
 refactor: deprecate `MulEquivClass` This PR continues the work from #18806. Original PR: https://github.com/leanprover-community/mathlib4/pull/18806 merge-conflict awaiting-author t-algebra
label:t-algebra$
 67/77 Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/Group/Equiv/Basic.lean,Mathlib/Algebra/Group/Equiv/Defs.lean,Mathlib/Algebra/Group/Irreducible/Lemmas.lean,Mathlib/Algebra/Group/Subgroup/Map.lean,Mathlib/Algebra/Group/Submonoid/Operations.lean,Mathlib/Algebra/Group/Units/Equiv.lean,Mathlib/Algebra/GroupWithZero/Equiv.lean,Mathlib/Algebra/GroupWithZero/NonZeroDivisors.lean,Mathlib/Algebra/Module/Equiv/Defs.lean,Mathlib/Algebra/Order/CauSeq/Basic.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Prime/Lemmas.lean,Mathlib/Algebra/Ring/Divisibility/Basic.lean,Mathlib/Algebra/Ring/Equiv.lean,Mathlib/Algebra/Star/MonoidHom.lean,Mathlib/Combinatorics/Additive/FreimanHom.lean,Mathlib/GroupTheory/GroupExtension/Defs.lean,Mathlib/GroupTheory/Submonoid/Center.lean,Mathlib/LinearAlgebra/FreeModule/Finite/CardQuotient.lean,Mathlib/RingTheory/Bialgebra/Equiv.lean,Mathlib/RingTheory/Ideal/Norm/AbsNorm.lean,Mathlib/RingTheory/Multiplicity.lean,Mathlib/RingTheory/UniqueFactorizationDomain/NormalizedFactors.lean,Mathlib/Topology/Algebra/ContinuousMonoidHom.lean,Mathlib/Topology/Algebra/InfiniteSum/Basic.lean 26 20 ['Vierkantor', 'alreadydone', 'astrainfinita', 'github-actions', 'grunweg', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'mathlib4-merge-conflict-bot'] Vierkantor
assignee:Vierkantor
 1
170-68609
5 months ago
234-28782
234 days ago
2-31233
2 days
27180 ADedecker
author:ADedecker
 feat: quotient of a monoid with zero by a multiplicative congruence --- My motivation is getting a more conceptual construction of [ValuativeRel.ValueGroupWithZero](https://leanprover-community.github.io/mathlib4_docs/Mathlib/RingTheory/Valuation/ValuativeRel.html#ValuativeRel.ValueGroupWithZero), but I think this is of independent interest. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra delegated
label:t-algebra$
 141/26 Mathlib.lean,Mathlib/Data/Quot.lean,Mathlib/Data/Setoid/Basic.lean,Mathlib/GroupTheory/Congruence/Defs.lean,Mathlib/GroupTheory/Congruence/GroupWithZero.lean 5 32 ['ADedecker', 'eric-wieser', 'github-actions', 'mathlib-bors', 'mathlib4-merge-conflict-bot', 'ocfnash'] ocfnash
assignee:ocfnash
 1
167-51865
5 months ago
246-67400
246 days ago
28-12053
28 days
9352 chenyili0818
author:chenyili0818
 feat: arithmetic lemmas for `gradient` This file is based on Mathlib.Analysis.Calculus.Gradient.Basic, and describes the calculation properties Co-authored-by: Ziyu Wang [tropicalfish910@gmail.com](mailto:tropicalfish910@gmail.com) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-analysis 404/0 Mathlib.lean,Mathlib/Analysis/Calculus/Gradient/Lemmas.lean 2 31 ['chenyili0818', 'github-actions', 'jcommelin', 'mathlib4-merge-conflict-bot', 'sgouezel', 'winstonyin'] nobody 1
148-73703
4 months ago
786-52152
786 days ago
52-1358
52 days
11890 adomani
author:adomani
 feat: the terminal refine linter A linter that warns on usages of `refine` and `refine'` as a finishing tactic. See this [Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Usage.20of.20refine'). ### Conclusion of the experiment Systematic replacements of terminal `refine` with `exact` leads to an overall slow-down. --- - [ ] depends on: #15616 (disable the linter in downstream projects) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-linter awaiting-author 77/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/TerminalRefineLinter.lean 3 15 ['adomani', 'github-actions', 'grunweg', 'joneugster', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'mathlib4-merge-conflict-bot', 'urkud'] nobody 1
148-73572
4 months ago
611-21678
611 days ago
18-28993
18 days
20924 tomaz1502
author:tomaz1502
 feat(Computability/QueryComplexity): Oracle-based computation This PR adds the types and lemmas for oracle-based computation. In this model, computations are run on a monad which also counts the number of oracle queries executed. With it, it becomes possible to reason about the upper bound of the query complexity of algorithms. In the future, we could extend this work to include the necessary bits from information theory and probability to also reason about lower bounds on query complexity, like the work in https://github.com/girving/debate. Zulip discussion: https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2318629.20runtime.20complexity.20of.20sorting.20a.20list Co-authored-by: Geoffrey Irving --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability 305/0 Mathlib.lean,Mathlib/Computability/QueryComplexity/Basic.lean,Mathlib/Computability/QueryComplexity/Defs.lean 3 60 ['eric-wieser', 'girving', 'github-actions', 'mathlib4-merge-conflict-bot', 'quangvdao', 'tomaz1502'] nobody 1
148-73138
4 months ago
418-6497
418 days ago
27-38491
27 days
21624 sinhp
author:sinhp
 feat(CategoryTheory): The (closed) monoidal structure on the product category of families of (closed) monoidal categories Given a family of closed monoidal categories, we show that the product of these categories is a closed monoidal category with the pointwise monoidal structure. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory 144/0 Mathlib.lean,Mathlib/CategoryTheory/Pi/Basic.lean,Mathlib/CategoryTheory/Pi/Monoidal.lean,Mathlib/CategoryTheory/Pi/MonoidalClosed.lean 4 20 ['TwoFX', 'YaelDillies', 'b-mehta', 'github-actions', 'jcommelin', 'mathlib4-merge-conflict-bot', 'sinhp'] nobody 1
148-73128
4 months ago
374-970
374 days ago
50-13773
50 days
22159 shetzl
author:shetzl
 feat: add definition of pushdown automata Add the definition of pushdown automata and their two acceptance conditions: acceptance based on empty stack and acceptance based on final state. Co-authored-by: Tobias Leichtfried --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability awaiting-author new-contributor 70/0 Mathlib.lean,Mathlib/Computability/PDA.lean 2 35 ['YaelDillies', 'github-actions', 'madvorak', 'mathlib4-merge-conflict-bot', 'shetzl'] nobody 1
148-72996
4 months ago
395-67009
395 days ago
20-81771
20 days
22919 plp127
author:plp127
 feat(Data/Fintype/Pi): Make `Fintype` instance for `RelHom`s computable Makes the `Fintype` instance for rel homs computable. See this [Zulip](https://leanprover.zulipchat.com/#narrow/channel/113489-new-members/topic/Classical.20vs.20constructive.20logic.20in.20computation/near/496220816) message. --- - [x] depends on: #24748 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-data 178/44 Mathlib/Combinatorics/SimpleGraph/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Coloring.lean,Mathlib/Combinatorics/SimpleGraph/Maps.lean,Mathlib/Data/Fintype/CardEmbedding.lean,Mathlib/Data/Fintype/Pi.lean 5 31 ['IvanRenison', 'b-mehta', 'eric-wieser', 'fpvandoorn', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'plp127'] b-mehta
assignee:b-mehta
 1
148-72970
4 months ago
322-86241
322 days ago
71-48538
71 days
26914 quangvdao
author:quangvdao
 feat(Data/PFunctor/Univariate): more definitions for univariate `PFunctor` This PR defines several basic definitions of `PFunctor`, including zero, one, constants, monomials, coproduct (sum), product, sigma, pi, tensor product, universe lifting, and equivalence. We also add: (1) simple lemmas connecting the basic definitions, (2) an automatically derived ext lemma for `PFunctor` via `@[ext]` attribute Some things I'm not clear on: - I define `HAdd` and `HMul` instances for coproduct and product of poly functors having different universe levels. Should I also define `Add` and `Mul` instances for poly functors having the same universe level? - Is it ok to define notation for tensor product, i.e. `@[inherit_doc] scoped infixr:80 " ⊗ " => tensor`? I'm worried it might clash with other notation. - Need a double-check on the priority of notation. Some future definitions to add: - Various equivalences arising from arithmetic identities, e.g., `P + 0 ≃ₚ P`. - Definitions of Lenses and Charts (each of them will be a file or even a folder) - Exponential objects (corresponding to both `prod` and `tensor`) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 144/5 Mathlib/Data/PFunctor/Univariate/Basic.lean 1 20 ['alexkeizer', 'eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot', 'quangvdao'] eric-wieser
assignee:eric-wieser
 1
148-72286
4 months ago
148-72287
148 days ago
133-24576
133 days
27163 pechersky
author:pechersky
 feat(Topology/ValuativeRel): of and to basis of compatible valuations --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #30262 t-number-theory t-algebra merge-conflict awaiting-author t-topology
label:t-algebra$
 229/62 Mathlib/NumberTheory/LocalField/Basic.lean,Mathlib/Order/Filter/Bases/Basic.lean,Mathlib/Topology/Algebra/Valued/ValuativeRel.lean 3 73 ['erdOne', 'github-actions', 'kckennylau', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'pechersky', 'smmercuri'] alreadydone
assignee:alreadydone
 1
148-72269
4 months ago
150-17660
150 days ago
84-39534
84 days
28325 pechersky
author:pechersky
 feat(WithZeroTopology): `locallyCompactSpace_iff_locallyFiniteOrder_units` On the way to golf/generalize the proof that locally compact valued fields have locally finite valuation groups as embodied in `Valued.integer.locallyFiniteOrder_units_mrange_of_isCompact_integer` ] --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology t-order large-import 81/2 Mathlib/Topology/Algebra/GroupWithZero.lean,Mathlib/Topology/Algebra/WithZeroTopology.lean,Mathlib/Topology/Compactness/Compact.lean 3 13 ['erdOne', 'github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot', 'ocfnash'] PatrickMassot
assignee:PatrickMassot
 1
148-71974
4 months ago
153-35857
153 days ago
93-44257
93 days
28871 JaafarTanoukhi
author:JaafarTanoukhi
 feat(Combinatorics/Digraph): Tournaments Define orientations and tournaments. Related to #26771. Co-authored-by: Rida Hamadani --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-combinatorics new-contributor 62/0 Mathlib.lean,Mathlib/Combinatorics/Digraph/Orientation.lean,Mathlib/Combinatorics/Digraph/Tournament.lean 3 6 ['JaafarTanoukhi', 'Rida-Hamadani', 'SnirBroshi', 'github-actions', 'mathlib4-merge-conflict-bot'] kmill
assignee:kmill
 1
148-71828
4 months ago
148-71829
148 days ago
71-37436
71 days
11800 JADekker
author:JADekker
 feat: KappaLindelöf spaces Define KappaLindelöf spaces by following the first one-third of the API for Lindelöf spaces. The remainder will be added in a future PR. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt merge-conflict t-topology awaiting-zulip 301/2 Mathlib.lean,Mathlib/Topology/Compactness/KappaLindelof.lean,Mathlib/Topology/Compactness/Lindelof.lean 3 38 ['ADedecker', 'JADekker', 'PatrickMassot', 'StevenClontz', 'adomani', 'github-actions', 'grunweg', 'kim-em', 'urkud'] nobody 1
148-45008
4 months ago
623-65290
623 days ago
123-25636
123 days
26310 kckennylau
author:kckennylau
 feat: binary forms This PR provides the basic definition of binary forms, which are homogeneous polynomials in two variables. --- - [ ] depends on: #26312 - [ ] depends on: #26313 - [ ] depends on: #26314 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 73/0 Mathlib.lean,Mathlib/RingTheory/MvPolynomial/BinaryForm.lean 2 14 ['MichaelStollBayreuth', 'github-actions', 'kckennylau', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'ocfnash'] ocfnash
assignee:ocfnash
 1
148-44420
4 months ago
240-41441
240 days ago
7-9588
7 days
24514 b-mehta
author:b-mehta
 chore(Int/GCD): use fuel in xgcd Modify the definition of xgcd to use fuel recursion, to allow it to be reduced in the kernel. As a consequence, this means the evaluation of field operations in ZMod p become provable by `rfl` and `decide`. Zulip discussion: https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/opaque.20recursion.20definitions.20break.20mergeSort.20decidability --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-data merge-conflict 44/22 Mathlib/Data/Int/GCD.lean 1 6 ['astrainfinita', 'b-mehta', 'eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot', 'nomeata', 'urkud'] nobody 1
140-60228
4 months ago
292-13706
292 days ago
58-34020
58 days
28057 plp127
author:plp127
 feat(SuccOrder): simp lemma to refold `Order.succ` and `Order.pred` Adds `SuccOrder.succ_eq_succ` and `PredOrder.pred_eq_pred` to refold `SuccOrder.succ` and `PredOrder.pred` into `Order.succ` and `Order.pred`. These lemmas are marked `@[simp]`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-order merge-conflict 8/2 Mathlib/Order/SuccPred/Basic.lean 1 4 ['YaelDillies', 'github-actions', 'mathlib4-merge-conflict-bot', 'plp127', 'vihdzp'] bryangingechen
assignee:bryangingechen
 1
132-6957
4 months ago
209-22665
209 days ago
44-10271
44 days
26912 pechersky
author:pechersky
 chore(Algebra/Ring/Subring): simp tag `Subring.smul_def` s-multiplying by a subtype is easiest to manipulate when both terms are in the ambient type. Many places that had to use the _def lemma for a rewrite, or to include it in a simp set, no longer have to. Ported from #25308 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) I found this being not-simp frustrating when talking about submodules over a valuation subring. merge-conflict t-algebra
label:t-algebra$
 67/66 Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Field/Subfield/Basic.lean,Mathlib/Algebra/Group/Subgroup/Actions.lean,Mathlib/Algebra/Group/Submonoid/MulAction.lean,Mathlib/Algebra/Module/LocalizedModule/Basic.lean,Mathlib/Algebra/Module/LocalizedModule/Exact.lean,Mathlib/Algebra/Module/LocalizedModule/IsLocalization.lean,Mathlib/Algebra/Module/LocalizedModule/Submodule.lean,Mathlib/Algebra/Ring/Periodic.lean,Mathlib/Algebra/Ring/Subring/Basic.lean,Mathlib/Algebra/Ring/Subsemiring/Basic.lean,Mathlib/Analysis/CStarAlgebra/Basic.lean,Mathlib/FieldTheory/KummerExtension.lean,Mathlib/GroupTheory/GroupAction/Defs.lean,Mathlib/GroupTheory/GroupAction/MultiplePrimitivity.lean,Mathlib/GroupTheory/GroupAction/MultipleTransitivity.lean,Mathlib/GroupTheory/GroupAction/SubMulAction/OfFixingSubgroup.lean,Mathlib/GroupTheory/GroupAction/SubMulAction/OfStabilizer.lean,Mathlib/LinearAlgebra/RootSystem/Irreducible.lean,Mathlib/LinearAlgebra/RootSystem/WeylGroup.lean,Mathlib/RingTheory/Etale/Kaehler.lean,Mathlib/RingTheory/Ideal/Over.lean,Mathlib/RingTheory/LocalProperties/Projective.lean,Mathlib/RingTheory/Localization/InvSubmonoid.lean,Mathlib/RingTheory/OreLocalization/Basic.lean 25 26 ['artie2000', 'eric-wieser', 'github-actions', 'j-loreaux', 'kckennylau', 'leanprover-bot', 'leanprover-radar', 'linesthatinterlace', 'mathlib4-merge-conflict-bot', 'pechersky'] joelriou
assignee:joelriou
 1
122-17593
4 months ago
143-53542
143 days ago
60-67125
60 days
33381 urkud
author:urkud
 feat: add a version of the Schwarz lemma Add a version of the Schwarz lemma that is midway between the original lemma and Pick's version. Use it to show that a function that is separately holomorphic on a polydisc and is bounded on this polydisc must be continuous on it. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [ ] depends on: #33368 - [x] depends on: #33362 t-analysis blocked-by-other-PR merge-conflict 475/91 Mathlib.lean,Mathlib/Analysis/Complex/Schwarz.lean,Mathlib/Analysis/Complex/UnitDisc/Basic.lean,Mathlib/Analysis/Complex/UnitDisc/Schwarz.lean,Mathlib/Analysis/Complex/UnitDisc/Shift.lean 5 22 ['girving', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'urkud'] nobody 1
106-80399
3 months ago
108-48879
108 days ago
0-947
15 minutes
17176 arulandu
author:arulandu
 feat: integrals and integrability with .re Lemmas for swapping order of .re and integration/integrability. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author new-contributor t-measure-probability please-adopt 49/0 Mathlib/MeasureTheory/Function/L1Space.lean,Mathlib/MeasureTheory/Integral/IntegrableOn.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral.lean,Mathlib/MeasureTheory/Integral/SetIntegral.lean 4 32 ['EtienneC30', 'arulandu', 'github-actions', 'loefflerd'] nobody 1
101-28573
3 months ago
548-75810
548 days ago
9-73631
9 days
32165 yuanyi-350
author:yuanyi-350
 feat(Real/Trigonometric): Add `sum_cos_arith_progression` and prepare for Dirichlet kernel --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis awaiting-author merge-conflict 68/0 Mathlib.lean,Mathlib/Analysis/Fourier/DirichletKernel.lean 2 8 ['BoltonBailey', 'github-actions', 'mathlib4-merge-conflict-bot', 'urkud', 'yuanyi-350'] fpvandoorn
assignee:fpvandoorn
 1
100-16866
3 months ago
137-3648
137 days ago
3-74302
3 days
25905 mans0954
author:mans0954
 feat(RingTheory/Polynomial/SmallDegreeVieta): polynomial versions of results in Algebra.QuadraticDiscriminant This PR continues the work from #25605. Original PR: https://github.com/leanprover-community/mathlib4/pull/25605 merge-conflict t-ring-theory please-adopt 77/8 Mathlib/Algebra/Polynomial/Coeff.lean,Mathlib/RingTheory/Polynomial/SmallDegreeVieta.lean 2 47 ['chrisflav', 'github-actions', 'kckennylau', 'mans0954', 'mathlib4-merge-conflict-bot', 'ocfnash'] chrisflav
assignee:chrisflav
 1
96-17466
3 months ago
222-45845
222 days ago
82-7527
82 days
12934 grunweg
author:grunweg
 chore: replace more uses of > or ≥ by < or ≤ These were flagged by the linter in https://github.com/leanprover-community/mathlib4/pull/12879: it is easy to simple avoid > or ≥ in hypotheses or haves. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author help-wanted 41/42 Archive/Imo/Imo1962Q1.lean,Archive/Imo/Imo1988Q6.lean,Archive/Imo/Imo1994Q1.lean,Archive/Imo/Imo2005Q3.lean,Archive/Imo/Imo2006Q3.lean,Archive/Imo/Imo2008Q2.lean,Archive/Imo/Imo2008Q3.lean,Archive/Imo/Imo2019Q4.lean,Archive/Sensitivity.lean,Archive/Wiedijk100Theorems/CubingACube.lean,Mathlib/Tactic/Linarith/Datatypes.lean,test/cancel_denoms.lean,test/congr.lean,test/interval_cases.lean,test/observe.lean 15 12 ['YaelDillies', 'adomani', 'github-actions', 'grunweg', 'jcommelin', 'urkud'] nobody 1
94-85281
3 months ago
699-54706
699 days ago
1-73101
1 day
32880 0xTerencePrime
author:0xTerencePrime
 feat(Analysis/Asymptotics): define subpolynomial growth ## Main definitions * `Asymptotics.IsSubpolynomial l f g`: A function `f` has subpolynomial growth with respect to `g` along filter `l` if `f = O(1 + ‖g‖^k)` for some natural `k`. ## Main results * `IsSubpolynomial.const`: Constant functions have subpolynomial growth * `IsSubpolynomial.id`: Identity has subpolynomial growth * `IsSubpolynomial.add`: Closure under addition * `IsSubpolynomial.neg`: Closure under negation * `IsSubpolynomial.sub`: Closure under subtraction * `IsSubpolynomial.mul`: Closure under multiplication * `IsSubpolynomial.pow`: Closure under powers * `isSubpolynomial_iff_one_add`: Equivalence with `(1 + ‖g‖)^k` formulation * `IsSubpolynomial.uniform`: Uniform bounds for finite families ## Implementation notes The definition uses `1 + ‖g‖^k` rather than `(1 + ‖g‖)^k` as the primary form, with the equivalence established in `isSubpolynomial_iff_one_add`. Four private auxiliary lemmas handle the key inequalities needed for closure proofs. Closes #32658 awaiting-author t-analysis new-contributor 185/0 Mathlib.lean,Mathlib/Analysis/Asymptotics/Subpolynomial.lean 2 28 ['0xTerencePrime', 'ADedecker', 'github-actions', 'j-loreaux'] ADedecker
assignee:ADedecker
 1
94-31647
3 months ago
94-31868
94 days ago
22-22665
22 days
29610 llllvvuu
author:llllvvuu
 feat(LinearAlgebra): define LinearMap.Eigenbasis Some theorems are left TODO for follow-up work. The definition is from @eric-wieser ([#Is there code for X? > diagonalizable linear maps @ 💬](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/diagonalizable.20linear.20maps/near/539163222)). Co-authored-by: Aristotle Harmonic --- - [x] depends on: #29420 (golfs some `[Nontrivial R]` assumptions) - [x] depends on: #29791 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra awaiting-author
label:t-algebra$
 455/5 Mathlib.lean,Mathlib/Analysis/InnerProductSpace/Spectrum.lean,Mathlib/LinearAlgebra/Eigenbasis.lean,Mathlib/LinearAlgebra/FreeModule/PID.lean,Mathlib/Order/CompleteLattice/Basic.lean 5 31 ['github-actions', 'joelriou', 'kckennylau', 'llllvvuu', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] joelriou
assignee:joelriou
 1
92-37290
3 months ago
148-71226
148 days ago
20-33900
20 days
32828 Hagb
author:Hagb
 feat(Algebra/Order/Group/Defs): add `IsOrderedAddMonoid.toIsOrderedCancelAddMonoid'` It is similar to `IsOrderedAddMonoid.toIsOrderedCancelAddMonoid`, while with different hypotheses. The conclusion `IsOrderedCancelMonoid α` on `IsOrderedAddMonoid.toIsOrderedCancelAddMonoid` still holds when the hypothesis `CommGroup α` is weakened to `CancelCommMonoid α` while `PartialOrder α` is strengthened to `LinearOrder α`. --- [`IsOrderedAddMonoid.toIsOrderedCancelAddMonoid`](https://leanprover-community.github.io/mathlib4_docs/find/?pattern=IsOrderedAddMonoid.toIsOrderedCancelAddMonoid#doc) and `IsOrderedAddMonoid.toIsOrderedCancelAddMonoid'`: https://github.com/leanprover-community/mathlib4/blob/97f78b1a4311fed1844b94f1c069219a48a098e1/Mathlib/Algebra/Order/Group/Defs.lean#L52-L62 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip t-algebra
label:t-algebra$
 4/0 Mathlib/Algebra/Order/Group/Defs.lean 1 8 ['Garmelon', 'Vierkantor', 'artie2000', 'github-actions', 'leanprover-radar'] eric-wieser
assignee:eric-wieser
 2
84-44002
2 months ago
84-44002
84 days ago
40-42357
40 days
33493 michelsol
author:michelsol
 feat(RingTheory/Polynomial): An explicit formula for the Chebyshev polynomials of the first kind Adds the following explicit formula on the Chebyshev polynomial of the first kind of order n. ${ T_{n}(x)\ =\ \sum \limits _{k=0}^{\lfloor {\frac {n}{2}}\rfloor } {\binom {n}{2k}} \left(\ X^{2}-1\ \right)^{k}\ X^{n-2k}}$ This explicit formula can be found [here](https://en.wikipedia.org/wiki/Chebyshev_polynomials#Explicit_expressions). There is a proof using complex numbers but it only works if the ring R = ℂ. The proof here is by induction and works in a commutative ring R. Mathlib seems to extend the definition of Chebyshev polynomials for $n \in \mathbb{Z}$ but this would make the formula more cumbersome with `n.natAbs` in place of `n`'s, so I expressed it on `n : ℕ` directly. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory new-contributor awaiting-author 51/1 Mathlib/RingTheory/Polynomial/Chebyshev.lean 1 8 ['YuvalFilmus', 'erdOne', 'github-actions', 'metakunt', 'michelsol'] chrisflav
assignee:chrisflav
 1
68-9281
2 months ago
68-9281
68 days ago
35-16104
35 days
11500 mcdoll
author:mcdoll
 refactor(Topology/Algebra/Module/WeakDual): Clean up - Move `Dual` and `dualPairing` lower in the import-hierachy - deduplicate `dualPairing` - Bundle continuity statements to `CLM`s. - Make `WeakDual` and `WeakSpace` reducible - Remove `refine'` in favor of `refine` --- Cleaning up `Analysis/NormedSpace/WeakDual` will be done in a second PR [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-topology 227/179 Mathlib.lean,Mathlib/Analysis/Fourier/RiemannLebesgueLemma.lean,Mathlib/Analysis/InnerProductSpace/Adjoint.lean,Mathlib/Analysis/InnerProductSpace/Dual.lean,Mathlib/Analysis/LocallyConvex/Polar.lean,Mathlib/Analysis/NormedSpace/Dual.lean,Mathlib/Analysis/NormedSpace/WeakDual.lean,Mathlib/Analysis/VonNeumannAlgebra/Basic.lean,Mathlib/MeasureTheory/Function/AEEqOfIntegral.lean,Mathlib/MeasureTheory/Measure/FiniteMeasure.lean,Mathlib/Topology/Algebra/Module/CharacterSpace.lean,Mathlib/Topology/Algebra/Module/Dual.lean,Mathlib/Topology/Algebra/Module/WeakDual.lean,docs/overview.yaml,docs/undergrad.yaml 15 16 ['ADedecker', 'grunweg', 'j-loreaux', 'kkytola', 'mathlib-bors', 'mcdoll', 'urkud'] nobody 2
60-49234
2 months ago
709-48434
709 days ago
46-5571
46 days
35134 fpvandoorn
author:fpvandoorn
 feat(translate): print constant names with hover info Part of #34846. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta awaiting-author merge-conflict 46/28 Mathlib/Tactic/Translate/Core.lean,MathlibTest/toAdditive.lean 2 6 ['JovanGerb', 'github-actions', 'mathlib-merge-conflicts'] JovanGerb
assignee:JovanGerb
 1
60-41154
2 months ago
62-33610
62 days ago
2-13760
2 days
24965 erdOne
author:erdOne
 refactor: Make `IsLocalHom` take unbundled map Under the current definition, `IsLocalHom f` and `IsLocalHom f.toMonoidHom` are not defeq, which causes quite some annoyances. We also have a consensus to not use `*HomClass` in definitions. As a result, we change `IsLocalHom` to take an unbundled function instead of a funlike. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra delegated merge-conflict
label:t-algebra$
 18/9 Mathlib/Algebra/Group/Units/Hom.lean,Mathlib/AlgebraicGeometry/Scheme.lean,Mathlib/Geometry/RingedSpace/LocallyRingedSpace.lean,Mathlib/Geometry/RingedSpace/OpenImmersion.lean,Mathlib/RingTheory/LocalRing/ResidueField/Basic.lean 5 15 ['adomani', 'alreadydone', 'erdOne', 'eric-wieser', 'github-actions', 'jcommelin', 'leanprover-community-bot-assistant', 'mathlib-bors', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'vihdzp'] mattrobball
assignee:mattrobball
 1
58-15665
1 month ago
149-67834
149 days ago
24-84527
24 days
31766 SuccessMoses
author:SuccessMoses
 feat(Topology/EMetricSpace): continuity of arc length fixes half of #31751 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-topology awaiting-author merge-conflict 396/0 Mathlib.lean,Mathlib/Topology/EMetricSpace/ArcLength.lean,Mathlib/Topology/EMetricSpace/BoundedVariation.lean 3 40 ['SnirBroshi', 'SuccessMoses', 'alreadydone', 'github-actions', 'grunweg', 'j-loreaux', 'mathlib-merge-conflicts'] nobody 1
52-21635
1 month ago
128-22505
128 days ago
2-78371
2 days
35494 Timeroot
author:Timeroot
 feat(Topology/Perfect): simp frontier_singleton Add simp lemma ``` theorem frontier_singleton {X : Type*} [TopologicalSpace X] [T1Space X] [PerfectSpace X] (p : X) : frontier {p} = {p} ``` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology awaiting-author 4/0 Mathlib/Topology/Perfect.lean 1 4 ['Timeroot', 'github-actions', 'urkud', 'vihdzp'] urkud
assignee:urkud
 1
51-44812
1 month ago
52-3948
52 days ago
5-41003
5 days
34932 erdOne
author:erdOne
 feat(AlgebraicGeometry): formally etale morphisms --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry merge-conflict delegated 163/12 Mathlib.lean,Mathlib/AlgebraicGeometry/Morphisms/Etale.lean,Mathlib/AlgebraicGeometry/Morphisms/FormallyEtale.lean,Mathlib/AlgebraicGeometry/Morphisms/RingHomProperties.lean,Mathlib/RingTheory/RingHom/Etale.lean 5 17 ['chrisflav', 'erdOne', 'github-actions', 'joneugster', 'mathlib-bors', 'mathlib-merge-conflicts', 'ocfnash'] nobody 1
49-9101
1 month ago
51-17590
51 days ago
11-35673
11 days
34440 grunweg
author:grunweg
 feat: linter for name components in uppercase Per the naming convention, these are errors (unless they are an abbreviation). Mathlib has *many* violations at the moment: for this reason, we add this as an environment linter and automatically add all current exceptions. Once these have been fixed, converting to a syntax linter is desirable. Until then, track the number of such exceptions as technical debt. --- [Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/naming.20convention.20linter/with/570617527) Note to self: wait for CI, then do a final nolints update. and try to implement the follow-up soon [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter large-import awaiting-author merge-conflict 1018/9 Mathlib/Tactic/Linter/Style.lean,MathlibTest/DoubleUnderscore.lean,MathlibTest/HashLint.lean,MathlibTest/Lint.lean,MathlibTest/LintStyle.lean,scripts/nolints.json,scripts/technical-debt-metrics.sh 7 27 ['Vierkantor', 'github-actions', 'grunweg', 'joneugster', 'mathlib-merge-conflicts'] joneugster
assignee:joneugster
 1
47-48343
1 month ago
57-68408
57 days ago
13-82065
13 days
26975 Whysoserioushah
author:Whysoserioushah
 feat: a norm_num extension for complex numbers co-authored-by : @thefundamentaltheor3m, @hrmacbeth --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta awaiting-author 424/12 Mathlib.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/Tactic.lean,Mathlib/Tactic/NormNum/Eq.lean,Mathlib/Tactic/NormNum/NormNumI.lean,Mathlib/Tactic/NormNum/Result.lean,MathlibTest/norm_numI.lean 7 57 ['JovanGerb', 'Vierkantor', 'Whysoserioushah', 'dupuisf', 'eric-wieser', 'github-actions', 'grunweg', 'hrmacbeth', 'mathlib4-merge-conflict-bot'] Vierkantor
assignee:Vierkantor
 1
43-49001
1 month ago
43-49001
43 days ago
112-29409
112 days
30431 kckennylau
author:kckennylau
 feat(RingTheory): a homogeneous submodule is the span of its homogeneous elements --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory merge-conflict 22/0 Mathlib/RingTheory/GradedAlgebra/Homogeneous/Ideal.lean,Mathlib/RingTheory/GradedAlgebra/Homogeneous/Submodule.lean 2 9 ['alreadydone', 'github-actions', 'kckennylau', 'mariainesdff', 'mathlib-merge-conflicts'] mariainesdff
assignee:mariainesdff
 1
42-29954
1 month ago
164-30815
164 days ago
23-31743
23 days
17627 hrmacbeth
author:hrmacbeth
 feat: universal properties of vector bundle constructions Characterizations for the smoothness of maps into the total spaces of (1) the direct sum of two vector bundles; (2) the pullback of a vector bundle. This gap in the library was exposed by #17358. --- - [x] depends on: #22804 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-differential-geometry 311/9 Mathlib/Data/Bundle.lean,Mathlib/Geometry/Manifold/VectorBundle/Basic.lean,Mathlib/Geometry/Manifold/VectorBundle/Pullback.lean,Mathlib/Topology/FiberBundle/Constructions.lean 4 26 ['PatrickMassot', 'fpvandoorn', 'github-actions', 'grunweg', 'hrmacbeth', 'j-loreaux', 'leanprover-community-bot-assistant', 'mathlib-bors', 'mathlib4-dependent-issues-bot', 'sgouezel'] grunweg
assignee:grunweg
 1
41-56346
1 month ago
301-56085
301 days ago
91-69159
91 days
19275 eric-wieser
author:eric-wieser
 fix: if nolint files change, do a full rebuild Otherwise CI will succeed when removing entries from the file, but fail later when someone changes something unrelated. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 8/0 lakefile.lean 1 22 ['YaelDillies', 'adomani', 'eric-wieser', 'fpvandoorn', 'github-actions', 'grunweg', 'mathlib-bors'] nobody 1
41-56329
1 month ago
513-10564
513 days ago
0-214
3 minutes
33592 nielstron
author:nielstron
 feat(Computability/ContextFreeGrammar): mapping between two types of nonterminal symbols This PR picks up https://github.com/leanprover-community/mathlib4/pull/15895 and resolves the failing lemma by redefining Good symbols. --- I checked that https://github.com/leanprover-community/mathlib4/pull/13514 builds correctly when based on this build. PR for that is #33599 This is my first contribution please let me know of any changes I should outline. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-computability new-contributor 160/0 Mathlib/Computability/ContextFreeGrammar.lean 1 34 ['YaelDillies', 'github-actions', 'madvorak', 'nielstron'] nobody 1
41-45345
1 month ago
90-73872
90 days ago
10-68503
10 days
27534 PierreQuinton
author:PierreQuinton
 feat: a typeclass for `sSup`/`sInf` to be lawful Adds lawful infima and suprema type classes. A preorder with lawful suprema: whenever a set has a least upper bound, `sSup` returns a least upper bound for that set. A preorder with lawful infima: whenever a set has a greatest lower bound, `sInf` returns a greastest lower bound for that set. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-order 121/8 Mathlib.lean,Mathlib/Order/CompleteLattice/Defs.lean,Mathlib/Order/LawfulSupInf.lean 3 26 ['PierreQuinton', 'YaelDillies', 'github-actions', 'mathlib4-merge-conflict-bot', 'plp127', 'vihdzp'] nobody 1
33-41049
1 month ago
148-72124
148 days ago
114-38193
114 days
30872 rudynicolop
author:rudynicolop
 feat(Computability/NFA): NFA closure under concatenation This PR proves that regular languages are closed under concatenation via a direct construction on `NFA`s without `εNFA` nor ε-transitions. The main new definitions and results include: - `M1.concat M2`, the concatenation of `NFA`s `M1` and `M2`, a direct construction without ε-transitions. - Theorem `accepts_concat : (M1.concat M2).accepts = M1.accepts * M2.accepts`, showing the correctness of the construction. - Theorem `IsRegular.mul`, showing that regular languages are closed under concatenation. --- - [x] depends on: #31038 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability new-contributor awaiting-author 104/7 Mathlib/Computability/NFA.lean 1 67 ['YaelDillies', 'ctchou', 'eric-wieser', 'github-actions', 'lambda-fairy', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'rudynicolop'] nobody 2
33-40983
1 month ago
77-29224
77 days ago
59-63981
59 days
32989 kim-em
author:kim-em
 fix(Tactic/Simps): skip @[defeq] inference for non-exposed definitions This PR makes `@[simps]` check whether the source definition's body is exposed before calling `inferDefEqAttr`. When the body is not exposed, we skip the `@[defeq]` inference to avoid validation errors. Without this fix, using `@[simps]` on a definition that is not `@[expose]`d produces an error like: ``` Theorem Foo_bar has a `rfl`-proof and was thus inferred to be `@[defeq]`, but validating that attribute failed: Not a definitional equality: the left-hand side ... is not definitionally equal to the right-hand side ... Note: This theorem is exported from the current module. This requires that all definitions that need to be unfolded to prove this theorem must be exposed. ``` The fix checks `(← getEnv).setExporting true |>.find? cfg.srcDeclName |>.any (·.hasValue)` to determine if the definition body is visible in the public scope, and only calls `inferDefEqAttr` if it is. 🤖 Prepared with Claude Code t-meta awaiting-author merge-conflict LLM-generated 51/3 Mathlib/CategoryTheory/Galois/EssSurj.lean,Mathlib/CategoryTheory/Triangulated/TStructure/TruncLTGE.lean,Mathlib/Tactic/Simps/Basic.lean,MathlibTest/SimpsModule.lean 4 17 ['JovanGerb', 'Vierkantor', 'github-actions', 'joneugster', 'kim-em', 'mathlib-merge-conflicts'] joneugster
assignee:joneugster
 1
31-45949
1 month ago
59-3417
59 days ago
37-27992
37 days
35524 grunweg
author:grunweg
 feat: text-based linter against \t followed by tactic mode Wait for the zulip discussion to converge. **If** there is consensus in favour of this change, summarise the motivation here. [zulip discuss](https://leanprover.zulipchat.com/#narrow/channel/345428-mathlib-reviewers/topic/proposal.3A.20no.20more.20use.20of.20.60.E2.96.B8.60.20in.20Mathlib.3F/with/574680826) --- There are currently 80 remaining exceptions in mathlib: ideally, these would get fixed before merging this. Works best when combined with #35523. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter awaiting-zulip merge-conflict 23/2 Mathlib/Tactic/Linter/TextBased.lean 1 5 ['github-actions', 'grunweg', 'joneugster', 'mathlib-merge-conflicts', 'vihdzp'] nobody 1
30-17741
30 days ago
56-65303
56 days ago
0-187
3 minutes
26078 kckennylau
author:kckennylau
 feat(AlgebraicGeometry): add x, y, px, py for points on elliptic curves --- Split from #25218. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-algebraic-geometry 44/0 Mathlib/AlgebraicGeometry/EllipticCurve/Affine/Point.lean 1 12 ['MichaelStollBayreuth', 'Multramate', 'acmepjz', 'dagurtomas', 'github-actions', 'kckennylau'] nobody 1
29-39276
29 days ago
238-45724
238 days ago
64-11252
64 days
28796 grunweg
author:grunweg
 feat: immersions are smooth The conventional textbook definition demands that an immersion be smooth. When asking for the immersion to have local slice charts (as we do), this implies smoothness automatically. --- - [x] depends on: #28701 - [x] depends on: #28793 - [x] depends on: #30356 - [x] depends on: #28853 (for simplicity) - [x] depends on: #36816 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry awaiting-author 96/12 Mathlib/Geometry/Manifold/ContMDiff/Atlas.lean,Mathlib/Geometry/Manifold/Immersion.lean,Mathlib/Geometry/Manifold/LocalSourceTargetProperty.lean,Mathlib/Geometry/Manifold/SmoothEmbedding.lean 4 56 ['chrisflav', 'github-actions', 'grunweg', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'sgouezel'] PatrickMassot
assignee:PatrickMassot
 1
28-44394
28 days ago
91-37060
91 days ago
0-1863
31 minutes
35215 kim-em
author:kim-em
 chore: use @[to_dual] in FixedPoints This PR adds `@[to_dual]` annotations to 14 theorems about `lfp` in `Order/FixedPoints.lean`, auto-generating their `gfp` duals and deleting the hand-written versions. Also registers `OrderHom.lfp` as the dual of `OrderHom.gfp` via `attribute [to_dual existing]`. Auto-generated duals include: `le_gfp`, `gfp_le_fixed`, `gfp_le`, `gfp_le_map`, `map_gfp`, `isFixedPt_gfp`, `map_le_gfp`, `isGreatest_gfp_le`, `isGreatest_gfp`, `gfp_induction`, `map_gfp_comp`, `gfp_gfp`, `map_inf_fixedPoints_le`, `map_sInf_subset_fixedPoints_le`. [Diff relative to #35208](https://github.com/kim-em/mathlib4/compare/kim/to-dual-bounds-basic...kim/to-dual-fixed-points) - [x] depends on: #35208 🤖 Prepared with Claude Code LLM-generated merge-conflict 249/548 Mathlib/Algebra/Module/Torsion/Basic.lean,Mathlib/Order/CompleteLattice/Basic.lean,Mathlib/Order/CompleteLattice/Defs.lean,Mathlib/Order/ConditionallyCompleteLattice/Defs.lean,Mathlib/Order/FixedPoints.lean,Mathlib/Order/GaloisConnection/Basic.lean,Mathlib/Order/Interval/Set/Disjoint.lean,Mathlib/Topology/Order.lean 8 11 ['JovanGerb', 'github-actions', 'kim-em', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vihdzp'] alexjbest
assignee:alexjbest
 1
27-40021
27 days ago
27-40022
27 days ago
24-18556
24 days
31141 peabrainiac
author:peabrainiac
 feat(Analysis/Calculus): parametric integrals over smooth functions are smooth Show that for any smooth function `f : H × ℝ → E`, the parametric integral `fun x ↦ ∫ t in a..b, f (x, t) ∂μ` is smooth too. The argument proceeds inductively, using the fact that derivatives of parametric integrals can themselves be computed as parametric integrals. The necessary lemmas on derivatives of parametric integrals already existed, but took some work to apply due to their generality; we state some convenient special cases. --- - [x] depends on: #31077 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis awaiting-author 470/12 Mathlib/Analysis/Calculus/ParametricIntegral.lean,Mathlib/Analysis/Calculus/ParametricIntervalIntegral.lean,Mathlib/MeasureTheory/Integral/DominatedConvergence.lean,Mathlib/Topology/NhdsWithin.lean,Mathlib/Topology/Separation/Regular.lean 5 36 ['fpvandoorn', 'github-actions', 'j-loreaux', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'peabrainiac', 'sgouezel'] j-loreaux
assignee:j-loreaux
 1
26-80962
26 days ago
64-59586
64 days ago
33-85043
33 days
33355 0xTerencePrime
author:0xTerencePrime
 feat(Combinatorics/SimpleGraph/Connectivity): define vertex connectivity This PR introduces the foundations of vertex connectivity for simple graphs, providing a counterpart to the edge connectivity theory in #32870. ### Main definitions - `SimpleGraph.IsVertexReachable`: vertices remain reachable after removing strictly fewer than `k` other vertices. - `SimpleGraph.IsVertexConnected`: a graph is `k`-vertex-connected if its order is strictly greater than `k` and any two distinct vertices are `k`-vertex-reachable. Includes basic characterizations for $k=0$ and $k=1$, along with monotonicity lemmas (`anti` and `mono`). new-contributor t-combinatorics awaiting-author merge-conflict 199/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/VertexConnectivity.lean,Mathlib/Combinatorics/SimpleGraph/IsolateVerts.lean 3 139 ['0xTerencePrime', 'SnirBroshi', 'SproutSeeds', 'YaelDillies', 'github-actions', 'mathlib-merge-conflicts', 'vihdzp'] nobody 1
26-10579
26 days ago
35-66292
35 days ago
35-56704
35 days
35423 Rob23oba
author:Rob23oba
 feat: add congruence lemmas for `Function.update` and `Pi.single` Adds `simp` congruence lemmas to `Function.update` and `Pi.single` that are specialized for the non-dependent case. See also [#mathlib4 > Simp fails to apply with `Function.update`](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Simp.20fails.20to.20apply.20with.20.60Function.2Eupdate.60/with/573889929). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author
label:t-algebra$
 29/6 Mathlib/Algebra/Notation/Pi/Basic.lean,Mathlib/Logic/Function/Basic.lean,Mathlib/NumberTheory/ModularForms/QExpansion.lean,Mathlib/RepresentationTheory/Tannaka.lean,Mathlib/Topology/Algebra/InfiniteSum/Basic.lean 5 10 ['Rob23oba', 'eric-wieser', 'github-actions', 'joelriou', 'joneugster', 'loefflerd'] joelriou
assignee:joelriou
 1
22-56959
22 days ago
22-77457
22 days ago
36-23157
36 days
36165 Parcly-Taxel
author:Parcly-Taxel
 chore: deprecate `Nat.strongRec(On)'` In favour of Batteries's `Nat.strongRec` for definitions and `Nat.strong_induction_on` for proofs. t-data merge-conflict 34/66 Mathlib/Analysis/Analytic/Inverse.lean,Mathlib/Data/Int/GCD.lean,Mathlib/Data/Nat/Factorization/Induction.lean,Mathlib/Data/Nat/Init.lean,Mathlib/Data/Set/Finite/Basic.lean,Mathlib/Data/ZMod/Basic.lean,Mathlib/GroupTheory/SpecificGroups/Cyclic.lean,Mathlib/Topology/EMetricSpace/Paracompact.lean 8 6 ['JovanGerb', 'MichaelStollBayreuth', 'Parcly-Taxel', 'Vierkantor', 'github-actions', 'mathlib-bors', 'mathlib-merge-conflicts'] Vierkantor
assignee:Vierkantor
 1
21-36145
21 days ago
27-40012
27 days ago
15-54679
15 days
30666 erdOne
author:erdOne
 feat(NumberTheory): every number field has a ramified prime --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory t-algebra awaiting-CI
label:t-algebra$
 261/10 Mathlib.lean,Mathlib/Algebra/Ring/Int/Field.lean,Mathlib/LinearAlgebra/Dimension/FreeAndStrongRankCondition.lean,Mathlib/NumberTheory/NumberField/Basic.lean,Mathlib/NumberTheory/NumberField/Discriminant/Different.lean,Mathlib/NumberTheory/NumberField/ExistsRamified.lean,Mathlib/NumberTheory/RamificationInertia/Inertia.lean,Mathlib/RingTheory/DedekindDomain/Basic.lean,Mathlib/RingTheory/Ideal/Maximal.lean,Mathlib/RingTheory/Ideal/Norm/AbsNorm.lean,Mathlib/RingTheory/IntegralClosure/IsIntegralClosure/Basic.lean,Mathlib/RingTheory/KrullDimension/Basic.lean 12 33 ['erdOne', 'github-actions', 'jcommelin', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'tb65536', 'xroblot'] jcommelin
assignee:jcommelin
 1
21-28905
21 days ago
158-49203
158 days ago
13-79962
13 days
20719 gio256
author:gio256
 feat(AlgebraicTopology): delaborators for truncated simplicial notations We add delaborators for the following notations, introduced in #20688: - `⦋m⦌ₙ`, which denotes the `m`-dimensional simplex in the `n`-truncated simplex category. - `X _⦋m⦌ₙ`, which denotes the `m`-th term of an `n`-truncated simplicial object `X`. - `X ^⦋m⦌ₙ`, which denotes the `m`-th term of an `n`-truncated cosimplicial object `X`. If `pp.proofs` is set to `true`, we also pretty-print the proof `p : m ≤ n` for all three notations as `⦋m, p⦌ₙ`, `X _⦋m, p⦌ₙ`, and `X ^⦋m, p⦌ₙ`, respectively. Credit to @kmill for one piece of code and much metaprogramming inspiration. --- - [x] depends on: #20688 - [x] depends on: #23018 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebraic-topology infinity-cosmos t-meta please-adopt will-close-soon 525/33 Mathlib.lean,Mathlib/AlgebraicTopology/SimplexCategory/Basic.lean,Mathlib/AlgebraicTopology/SimplexCategory/Defs.lean,Mathlib/AlgebraicTopology/SimplicialObject/Basic.lean,Mathlib/Tactic.lean,Mathlib/Tactic/SimplexCategory.lean,Mathlib/Util/Superscript.lean,MathlibTest/SimplexCategory.lean,MathlibTest/SimplicialObject.lean,MathlibTest/superscript.lean,scripts/noshake.json 11 24 ['eric-wieser', 'gio256', 'github-actions', 'joneugster', 'kim-em', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody 1
20-64146
20 days ago
270-25372
270 days ago
88-84229
88 days
21476 grunweg
author:grunweg
 feat(lint-style): enable running on downstream projects Enable lint-style to run on downstream projects, by making the following modifications: - allow passing an explicit list of libraries to lint: if nothing is passed, it lints `Mathlib`, `Archive` and `Counterexamples` (as before); otherwise, it lints precisely the passed modules - only check init imports, undocumented scripts and the errors from `lint-style.py` when linting Mathlib - make the style exceptions file configurable and optional: using the `nolints-file` flag, the exceptions file can be configured. If the flag is omitted, we try to find a file at `scripts/nolints-style.txt` --- and otherwise proceed with no style exceptions. This means mathlib can continue unchanged, and downstream projects can either add an explicit exceptions file, or proceed without any exceptions. After this PR, one should be able to run lint-style on a downstream project by `lake exe lint-style ProjectName`. Prompted by [this zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/lint-style.20for.20downstream.20libraries). --- - [x] depends on: #24570 - [x] depends on: #24953 (I did not test the last part.) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-linter awaiting-author please-adopt 58/19 Mathlib/Tactic/Linter/TextBased.lean,scripts/lint-style.lean 2 21 ['Vierkantor', 'adomani', 'github-actions', 'grunweg', 'joneugster', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody 1
20-63595
20 days ago
335-42300
335 days ago
43-17409
43 days
36706 kim-em
author:kim-em
 feat(Tactic/FastInstance): warn when a synthesized sub-instance has leaky binder types This PR adds a warning to `fast_instance%` and `inferInstanceAs%` when they encounter a synthesized sub-instance that has leaky data-field binder types. When `fast_instance%` recursively normalizes a class instance, it uses `trySynthInstance` to find canonical sub-instances. If a found sub-instance is not canonical at instances transparency (i.e., its internal lambda binder types reference an unexpanded type alias instead of the target carrier), the tool now emits a warning: ``` fast_instance%: 'leakySub' (for SubClass MyNat) has leaky data-field binder types, which may cause `isDefEq` failures at instances transparency (e.g. in `grind`). Consider redefining it with `fast_instance%` or `inferInstanceAs%`. To suppress: `set_option Elab.fast_instance.warnLeakySubInstances false` ``` The leakiness check uses `withDisabledInstance` to temporarily evict the sub-instance from the discrimination tree (preventing trivial self-match via `trySynthInstance`), then compares against the canonical form at instances transparency. A `warnLeaky` parameter propagates through recursive calls to prevent nested warnings. The warning is suppressed via `set_option Elab.fast_instance.warnLeakySubInstances false`. - [ ] depends on: #36701 🤖 Prepared with Claude Code t-meta blocked-by-other-PR large-import LLM-generated merge-conflict 415/21 Mathlib/Algebra/Module/Congruence/Defs.lean,Mathlib/GroupTheory/Congruence/Defs.lean,Mathlib/Init.lean,Mathlib/RingTheory/Congruence/Defs.lean,Mathlib/RingTheory/Ideal/Quotient/Basic.lean,Mathlib/RingTheory/Ideal/Quotient/Defs.lean,Mathlib/Tactic/DefEqAbuse.lean,Mathlib/Tactic/FastInstance.lean,MathlibTest/CheckInstance.lean,MathlibTest/DefEqAbuse.lean,MathlibTest/InferInstanceAsPercent.lean 11 7 ['Vierkantor', 'eric-wieser', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] Vierkantor
assignee:Vierkantor
 1
20-25657
20 days ago
32-3362
32 days ago
0-1003
16 minutes
32282 jsm28
author:jsm28
 feat(Geometry/Euclidean/Angle/Incenter): unoriented angle bisection Add lemmas giving unoriented angles involving the incenter and excenters of a triangle as expressions involving dividing angles of the triangle by 2, deduced from oriented bisection lemmas. --- - [ ] depends on: #30981 - [ ] depends on: #30982 - [ ] depends on: #31205 - [ ] depends on: #32019 - [ ] depends on: #32021 - [ ] depends on: #32259 - [ ] depends on: #32260 - [ ] depends on: #32270 - [ ] depends on: #32273 - [ ] depends on: #32278 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-euclidean-geometry 98/0 Mathlib/Geometry/Euclidean/Angle/Incenter.lean 1 8 ['github-actions', 'jsm28', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'wwylele'] JovanGerb
assignee:JovanGerb
 1
18-27046
18 days ago
20-34577
20 days ago
20-35302
20 days
37317 vihdzp
author:vihdzp
 feat: a topology with a basis of clopens is completely regular --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 11/0 Mathlib/Topology/Separation/CompletelyRegular.lean 1 4 ['felixpernegger', 'github-actions', 'themathqueen', 'vihdzp'] urkud
assignee:urkud
 2
16-51641
16 days ago
19-45103
19 days ago
19-45092
19 days
36788 hommmmm
author:hommmmm
 feat(RingTheory): height of span of a prime element is one ## Summary - Add `Ideal.height_span_singleton_eq_one_of_prime`: in a Noetherian integral domain, the ideal generated by a prime element has height one. ## Notes The new theorem follows directly from `height_le_one_of_isPrincipal_of_mem_minimalPrimes` (upper bound) and the fact that `span {p} ≠ ⊥` for `p` prime (lower bound). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory new-contributor 12/1 Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean 1 5 ['Multramate', 'github-actions', 'hommmmm'] mattrobball
assignee:mattrobball
 1
16-21010
16 days ago
16-22030
16 days ago
30-2854
30 days
35683 gasparattila
author:gasparattila
 fix(Tactic/FunProp): detect `Continuous.subtype_mk` as compositional This PR changes `fun_prop` to detect some theorems involving dependent types, such as `Continous.subtype_mk` to be in compositional form. This lets `fun_prop` solve goals such as `Continuous fun x => (⟨x, trivial⟩ : {x : ℝ // True})`. --- These theorems become compositional: `Continuous.subtype_mk`, `Topology.IsEmbedding.inclusion`, `Topology.IsOpenEmbedding.inclusion`, `Topology.IsClosedEmbedding.inclusion`, `Measurable.subtype_mk`, `Measurable.imp`, `Path.symm_continuous_family`, `Continuous.upperHalfPlaneMk` These theorems become simple: `hasFDerivAt_prodMk_left`, `hasFDerivAt_prodMk_right`, `contDiff_prodMk_left`, `contDiff_prodMk_right` [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 57/33 Mathlib/Tactic/FunProp/Core.lean,Mathlib/Tactic/FunProp/FunctionData.lean,Mathlib/Tactic/FunProp/Theorems.lean,Mathlib/Topology/Homeomorph/Lemmas.lean,MathlibTest/fun_prop_dev.lean 5 6 ['gasparattila', 'github-actions', 'grunweg', 'lecopivo', 'mathlib-merge-conflicts'] dwrensha
assignee:dwrensha
 1
15-25546
15 days ago
20-22680
20 days ago
52-20230
52 days
36832 KryptosAI
author:KryptosAI
 chore(Data/Finset/Card): rename `pred_card_le_card_erase` to `sub_one_card_le_card_erase` ## Summary The name `pred_card_le_card_erase` suggests `Nat.pred` but the statement uses `- 1` (i.e., `Nat.sub 1`). Rename to `sub_one_card_le_card_erase` to match the actual statement. A deprecated alias is added for backwards compatibility. ### Files changed - `Mathlib/Data/Finset/Card.lean` — definition renamed + deprecated alias - `Mathlib/Data/Finset/Powerset.lean` — reference updated - `Mathlib/Combinatorics/Additive/SubsetSum.lean` — reference updated - `Mathlib/Algebra/Polynomial/EraseLead.lean` — reference updated Addresses the `Finset.pred_card_le_card_erase` item in #21584. ## AI disclosure I used Claude Code to explore the codebase (finding all references to rename) and to draft the PR description. I reviewed and understand all changes — these are straightforward renames with a deprecated alias. new-contributor 22/15 Mathlib/Algebra/Polynomial/EraseLead.lean,Mathlib/Combinatorics/Additive/SubsetSum.lean,Mathlib/Combinatorics/SetFamily/AhlswedeZhang.lean,Mathlib/Combinatorics/SetFamily/Shadow.lean,Mathlib/Data/Finset/Card.lean,Mathlib/Data/Finset/Powerset.lean,Mathlib/Data/Set/Card.lean,Mathlib/GroupTheory/Perm/Support.lean,Mathlib/RingTheory/Ideal/Operations.lean 9 5 ['KryptosAI', 'Multramate', 'github-actions', 'ooovi'] nobody 1
14-6748
14 days ago
14-6806
14 days ago
28-17123
28 days
37248 harahu
author:harahu
 doc(Tactic): avoid lazy continuation lines We resolve the ambiguity inherent in lazy (un-indented) list item continuation lines by either indenting them or separating them by inserting a newline in the cases where the item continuation was a mistake. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) documentation 131/116 Mathlib/Tactic/Algebraize.lean,Mathlib/Tactic/Basic.lean,Mathlib/Tactic/CategoryTheory/Coherence/PureCoherence.lean,Mathlib/Tactic/ComputeDegree.lean,Mathlib/Tactic/DepRewrite.lean,Mathlib/Tactic/Finiteness.lean,Mathlib/Tactic/FunProp.lean,Mathlib/Tactic/FunProp/Core.lean,Mathlib/Tactic/FunProp/Theorems.lean,Mathlib/Tactic/Linarith/Oracle/FourierMotzkin.lean,Mathlib/Tactic/Linter/FlexibleLinter.lean,Mathlib/Tactic/MinImports.lean,Mathlib/Tactic/MoveAdd.lean,Mathlib/Tactic/Order.lean,Mathlib/Tactic/SimpIntro.lean,Mathlib/Tactic/Simps/Basic.lean,Mathlib/Tactic/Widget/InteractiveUnfold.lean 17 1 ['Multramate', 'github-actions'] nobody 1
13-51352
13 days ago
21-14885
21 days ago
21-20571
21 days
37538 harahu
author:harahu
 doc(Probability): avoid lazy continuation lines We resolve the ambiguity inherent in lazy (un-indented) list item continuation lines by either indenting them or separating them by inserting a newline in the cases where the item continuation was a mistake. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability 7/4 Mathlib/Probability/Independence/InfinitePi.lean,Mathlib/Probability/Kernel/Category/SFinKer.lean,Mathlib/Probability/Kernel/Category/Stoch.lean,Mathlib/Probability/Notation.lean,Mathlib/Probability/Process/Filtration.lean,Mathlib/Probability/StrongLaw.lean 6 1 ['Multramate', 'github-actions'] kex-y
assignee:kex-y
 1
13-10590
13 days ago
14-56441
14 days ago
14-56430
14 days
36833 harahu
author:harahu
 doc: demote repeated H1 headers Having more than one H1 header per file confuses search engines and thus makes documentation more difficult to find. Hence, we make sure that lean files only have a single H1 header in them. In the case of `Mathlib/Tactic/Common.lean`, we achieve this by adding a new module header. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) documentation 12/10 Archive/Imo/Imo2002Q3.lean,Archive/Imo/Imo2010Q5.lean,Mathlib/Geometry/Manifold/VectorBundle/LocalFrame.lean,Mathlib/Probability/Distributions/Gaussian/HasGaussianLaw/Basic.lean,Mathlib/RingTheory/LocalProperties/Injective.lean,Mathlib/RingTheory/LocalProperties/ProjectiveDimension.lean,Mathlib/RingTheory/QuasiFinite/Weakly.lean,Mathlib/Tactic/Common.lean,Mathlib/Tactic/Linter/EmptyLine.lean 9 2 ['github-actions', 'harahu', 'vihdzp'] nobody 1
12-30518
12 days ago
12-30574
12 days ago
12-30967
12 days
35518 kim-em
author:kim-em
 chore: forbid prime (') in filenames, rename LinearCombination' This PR renames `Mathlib/Tactic/LinearCombination'.lean` to `LinearCombinationPrime.lean` (and the corresponding test file), and adds a lint check to `modulesOSForbidden` to prevent future files with prime/apostrophe characters in their names. The `'` character in filenames causes shell escaping issues in scripts (any `find ... -name '*.lean'` or similar pattern needs careful quoting to handle these files correctly). 🤖 Prepared with Claude Code file-removed t-meta LLM-generated merge-conflict 13/8 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/LinearCombinationPrime.lean,Mathlib/Tactic/Linter/TextBased.lean,Mathlib/Tactic/Linter/UnusedTactic.lean,MathlibTest/linear_combination_prime.lean 6 8 ['eric-wieser', 'euprunin', 'github-actions', 'kim-em', 'mathlib-merge-conflicts'] dwrensha
assignee:dwrensha
 1
11-47206
11 days ago
11-47206
11 days ago
25-42954
25 days
34507 metakunt
author:metakunt
 feat(NumberTheory/AKSPrimality): Adds the AKS primality test Adds the completed proof for the AKS primality test. Everything except the final theorem is marked private as it's only needed for the final proof. Also everything except the final theorem is namespaced with AKS. ---- Zulip discussion: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Aks.20primality.20Theorem.206.2E1.20Claim.20.28i.29.20proven t-number-theory 645/0 Mathlib.lean,Mathlib/NumberTheory/AKSPrimality.lean 2 51 ['github-actions', 'jcommelin', 'kim-em', 'metakunt', 'qawbecrdtey', 'tb65536', 'vihdzp'] tb65536
assignee:tb65536
 1
10-47064
10 days ago
18-77790
18 days ago
48-70540
48 days
31135 kckennylau
author:kckennylau
 feat(RingTheory): is localization iff is localization on saturation In this PR we show that `A` is a localization of `R` on the submonoid `S` iff it is so on the saturation of `S`. Crucially, the saturation of `S` is precisely the elements that become a unit in `A`. --- - [x] depends on: #31132 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory delegated 53/0 Mathlib.lean,Mathlib/RingTheory/Localization/Saturation.lean 2 15 ['alreadydone', 'chrisflav', 'github-actions', 'kckennylau', 'mathlib-bors', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'riccardobrasca'] chrisflav
assignee:chrisflav
 1
9-64160
9 days ago
9-64161
9 days ago
32-67694
32 days
37752 JovanGerb
author:JovanGerb
 chore(Order/CompleteLattice/Lemmas): use `to_dual` Use `to_dual` for lemmas about `CompleteLattice`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 27/56 Mathlib/Order/CompleteLattice/Lemmas.lean 1 1 ['github-actions', 'vihdzp'] nobody 1
9-40806
9 days ago
9-47464
9 days ago
9-47453
9 days
37753 JovanGerb
author:JovanGerb
 chore(Order/Filter/Basic): use `to_dual` for `≤ᶠ` Use `to_dual` on lemmas about `EventuallyLE`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 19/6 Mathlib/Order/Filter/Basic.lean 1 2 ['github-actions', 'vihdzp'] nobody 1
9-40717
9 days ago
9-47329
9 days ago
9-47318
9 days
37738 khwilson
author:khwilson
 feat(Topology/Order/Bornology): generalize `cobounded_eq` `Real.cobounded_eq` and `Int.cobounded_eq` are used in several places throughout Mathlib. They are currently proved in terms of the Metric topology on `Int` and `Real`, but they're really properties of the order bornology on those objects. Generalize those constructions to `IsOrderBornology` for `LinearOrder`'s and add a few more constructions that are true in other circumstances, e.g., `cobounded NNReal = .atTop` follows from the fact that `NNReal` is both `NoMaxOrder` and `OrderBot`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) maintainer-merge t-order 57/18 Mathlib/Analysis/Polynomial/Basic.lean,Mathlib/Analysis/SpecialFunctions/Complex/LogBounds.lean,Mathlib/Topology/Instances/Int.lean,Mathlib/Topology/Instances/Real/Lemmas.lean,Mathlib/Topology/Order/Bornology.lean 5 14 ['YaelDillies', 'github-actions', 'khwilson', 'vihdzp'] nobody 2
9-16989
9 days ago
9-54935
9 days ago
9-55767
9 days
37304 vihdzp
author:vihdzp
 feat: if `s ∪ t` is directed then one of `s` or `t` is --- Co-authored-by: Kamille Bidan <25210160030@m.fudan.edu.cn> [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 57/0 Mathlib/Order/Bounds/Basic.lean 1 12 ['NoneMore', 'b-mehta', 'fpvandoorn', 'github-actions', 'mathlib-bors', 'plp127', 'vihdzp'] bryangingechen
assignee:bryangingechen
 1
9-10380
9 days ago
10-42696
10 days ago
13-50085
13 days
37544 SnirBroshi
author:SnirBroshi
 chore(Combinatorics/SimpleGraph/Coloring): move `ConcreteColorings.lean` and `EdgeLabeling.lean` to `Coloring/` Moves `SimpleGraph/ConcreteColorings.lean` to `SimpleGraph/Coloring/Constructions.lean` and `SimpleGraph/EdgeLabeling.lean` to `SimpleGraph/Coloring/EdgeLabeling.lean`. See [Zulip](https://leanprover.zulipchat.com/#narrow/channel/252551-graph-theory/topic/Coloring.20module.20names/with/583281500) --- [Zulip](https://leanprover.zulipchat.com/#narrow/channel/252551-graph-theory/topic/Coloring.20module.20names/with/583281500) might want to rename `ConcreteColorings` (Edit: the poll chose `Constructions.lean`) #37546 adds module deprecations [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed t-combinatorics maintainer-merge 2/2 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Coloring/Constructions.lean,Mathlib/Combinatorics/SimpleGraph/Coloring/EdgeLabeling.lean 3 2 ['YaelDillies', 'github-actions', 'ooovi'] nobody 2
8-67705
8 days ago
11-48157
11 days ago
11-48290
11 days
37603 Parcly-Taxel
author:Parcly-Taxel
 refactor: review of `SetSemiring` * Rename `Set.up` and `SetSemiring.down` to `SetSemiring.ofSet` and `SetSemiring.toSet` respectively. Unprotect both and make them equivalences, following `FreeMonoid`. * Derive `CompleteAtomicBooleanAlgebra` for `SetSemiring` immediately. * Add `imageHom_id` and `imageHom_comp`. The three existing lemmas about `imageHom` are coalesced into `imageHom_apply`. Ultimately inspired by https://github.com/leanprover-community/mathlib4/pull/36934#issuecomment-4183475568. maintainer-merge 120/165 Mathlib/Algebra/Algebra/Operations.lean,Mathlib/Data/Set/Semiring.lean 2 41 ['Parcly-Taxel', 'YaelDillies', 'eric-wieser', 'github-actions', 'mathlib-merge-conflicts', 'sgouezel'] nobody 1
8-48463
8 days ago
8-48721
8 days ago
9-76114
9 days
36740 euprunin
author:euprunin
 chore: golf using `grind` The goal of this PR is to decrease the number of times lemmas are called explicitly. Any decrease in compilation time is a welcome side effect, although it is not a primary objective. Trace profiling results (differences <30 ms considered measurement noise): * `AlgebraicGeometry.Scheme.isBasis_affineOpens`: unchanged 🎉 * `SimpleGraph.Walk.takeUntil_eq_take`: 263 ms before, 180 ms after 🎉 * `SimpleGraph.Walk.dropUntil_eq_drop`: 382 ms before, 261 ms after 🎉 * `Int.image_Ico_emod`: unchanged 🎉 * `Equiv.Perm.ofSubtype_swap_eq`: unchanged 🎉 Profiled using `set_option trace.profiler true in`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 7/33 Mathlib/AlgebraicGeometry/AffineScheme.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Decomp.lean,Mathlib/Data/Int/Interval.lean,Mathlib/GroupTheory/Perm/Support.lean 4 7 ['artie2000', 'chenson2018', 'github-actions', 'mathlib-merge-conflicts'] nobody 1
8-15365
8 days ago
14-56314
14 days ago
30-28122
30 days
37623 IvanRenison
author:IvanRenison
 feat(Order/RelIso): add theorems about `RelHom.comp` and `RelEmbedding.trans` Co-authored-by: SnirBroshi <26556598+SnirBroshi@users.noreply.github.com> --- Missing of this theorems noticed by @SnirBroshi in #37598 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 18/0 Mathlib/Order/RelIso/Basic.lean 1 6 ['IvanRenison', 'SnirBroshi', 'eric-wieser', 'github-actions'] bryangingechen
assignee:bryangingechen
 1
8-10606
8 days ago
11-39995
11 days ago
12-63519
12 days
37346 euprunin
author:euprunin
 chore: golf using `grind` The goal of this PR is to decrease the number of times lemmas are called explicitly. Any decrease in compilation time is a welcome side effect, although it is not a primary objective. Trace profiling results (differences <30 ms considered measurement noise): * `✅️ SimpleGraph.Walk.IsPath.getVert_injOn`: unchanged 🎉 * `✅️ SimpleGraph.Walk.length_bypass_le`: unchanged 🎉 * `✅️ Rat.floor_intCast_div_natCast`: unchanged 🎉 * `✅️ InnerProductGeometry.norm_eq_of_angle_sub_eq_angle_sub_rev_of_angle_ne_pi`: unchanged 🎉 * `✅️ padicNorm.zero_of_padicNorm_eq_zero`: unchanged 🎉 Profiled using `set_option trace.profiler true in`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 7/45 Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Data/Rat/Floor.lean,Mathlib/Geometry/Euclidean/Triangle.lean,Mathlib/NumberTheory/Padics/PadicNorm.lean 4 8 ['FernandoChu', 'chenson2018', 'euprunin', 'github-actions'] nobody 1
7-71136
7 days ago
18-20552
18 days ago
18-20541
18 days
37386 gasparattila
author:gasparattila
 chore: call `dsimp` in the default tactic of `ContinuousLinearMap` --- This will also reduce the breakage in https://github.com/leanprover-community/mathlib4/pull/35548. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology awaiting-author 33/76 Mathlib/Algebra/Category/ContinuousCohomology/Basic.lean,Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/NonUnital.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Unital.lean,Mathlib/Analysis/Distribution/DerivNotation.lean,Mathlib/Analysis/Distribution/TestFunction.lean,Mathlib/Analysis/Fourier/Notation.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Analysis/InnerProductSpace/Spectrum.lean,Mathlib/Analysis/Normed/Algebra/Spectrum.lean,Mathlib/Analysis/Normed/Lp/PiLp.lean,Mathlib/Analysis/Normed/Lp/ProdLp.lean,Mathlib/Analysis/Normed/Module/WeakDual.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/Rpow/ConjSqrt.lean,Mathlib/MeasureTheory/Function/SimpleFuncDenseLp.lean,Mathlib/MeasureTheory/Measure/FiniteMeasure.lean,Mathlib/NumberTheory/ModularForms/JacobiTheta/TwoVariable.lean,Mathlib/Probability/Distributions/Fernique.lean,Mathlib/Probability/Distributions/Gaussian/IsGaussianProcess/Basic.lean,Mathlib/Probability/Distributions/Gaussian/IsGaussianProcess/Independence.lean,Mathlib/Topology/Algebra/Algebra.lean,Mathlib/Topology/Algebra/GroupCompletion.lean,Mathlib/Topology/Algebra/LinearMapCompletion.lean,Mathlib/Topology/Algebra/Module/Alternating/Topology.lean,Mathlib/Topology/Algebra/Module/LinearMap.lean,Mathlib/Topology/Algebra/Module/LinearMapPiProd.lean,Mathlib/Topology/Algebra/Module/Multilinear/Basic.lean,Mathlib/Topology/Algebra/Module/Multilinear/Topology.lean,Mathlib/Topology/Algebra/Module/Star.lean,Mathlib/Topology/Algebra/Star/LinearMap.lean,Mathlib/Topology/CompactOpen.lean,Mathlib/Topology/Constructions.lean,Mathlib/Topology/ContinuousMap/Algebra.lean,Mathlib/Topology/ContinuousMap/Ideals.lean,Mathlib/Topology/Instances/TrivSqZeroExt.lean 36 15 ['gasparattila', 'github-actions', 'j-loreaux', 'leanprover-radar', 'mathlib-bors', 'themathqueen'] j-loreaux
assignee:j-loreaux
 1
7-66914
7 days ago
9-37442
9 days ago
6-4534
6 days
32546 anishrajeev
author:anishrajeev
 feat(ModelTheory): Prove compactness of the type space Define the space of types and prove various topological properties of it (zero dimensional, totally separated, compact, baire). The goal is to formalize the proof of the Omitting Types Theorem - [ ] depends on: #32215 t-logic new-contributor large-import 31/1 Mathlib/ModelTheory/Topology/Types.lean 1 12 ['NoneMore', 'anishrajeev', 'fpvandoorn', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] fpvandoorn
assignee:fpvandoorn
 1
7-64885
7 days ago
8-82945
8 days ago
12-80893
12 days
35295 Rida-Hamadani
author:Rida-Hamadani
 feat(SimpleGraph): `dropLast` of a cycle is a path --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics awaiting-author 14/0 Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Operations.lean 2 14 ['Rida-Hamadani', 'SnirBroshi', 'YaelDillies', 'github-actions', 'mathlib-merge-conflicts', 'vlad902'] YaelDillies
assignee:YaelDillies
 1
7-48721
7 days ago
7-72668
7 days ago
34-54463
34 days
37291 IvanRenison
author:IvanRenison
 refactor(Combinatorics/SimpleGraph): move `chromaticNumber_le_two_iff_isBipartite` and `chromaticNumber_eq_two_iff` to `Bipartite` file --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics maintainer-merge 10/12 Mathlib/Combinatorics/SimpleGraph/Bipartite.lean,Mathlib/Combinatorics/SimpleGraph/ConcreteColorings.lean 2 2 ['Ruben-VandeVelde', 'github-actions'] nobody 1
7-29647
7 days ago
20-17455
20 days ago
20-17444
20 days
36686 euprunin
author:euprunin
 chore: golf using `grind` The goal of this PR is to decrease the number of times lemmas are called explicitly. Any decrease in compilation time is a welcome side effect, although it is not a primary objective. Trace profiling results (differences <30 ms considered measurement noise): * `List.prod_map_ite`: unchanged 🎉 * `Path.Homotopy.trans_assoc_reparam`: 2938 ms before, 717 ms after 🎉 * `SimplexCategory.δ_comp_δ`: 522 ms before, 316 ms after 🎉 * `Finsupp.ext_iff'`: unchanged 🎉 * `Computation.bind_assoc`: unchanged 🎉 * `Set.piecewise_insert`: unchanged 🎉 * `ZMod.valMinAbs_mem_Ioc`: unchanged 🎉 * `Matrix.det_eq_of_forall_row_eq_smul_add_pred_aux`: 2141 ms before, 2004 ms after 🎉 Profiled using `set_option trace.profiler true in`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 11/51 Mathlib/Algebra/BigOperators/Group/List/Basic.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/Basic.lean,Mathlib/AlgebraicTopology/SimplexCategory/Basic.lean,Mathlib/Data/Finsupp/Defs.lean,Mathlib/Data/Seq/Computation.lean,Mathlib/Data/Set/Piecewise.lean,Mathlib/Data/ZMod/ValMinAbs.lean,Mathlib/LinearAlgebra/Matrix/Determinant/Basic.lean 8 11 ['artie2000', 'chenson2018', 'euprunin', 'github-actions', 'ooovi'] nobody 2
7-23832
7 days ago
32-44828
32 days ago
32-44817
32 days
37697 IvanRenison
author:IvanRenison
 feat(Combinatorics/SimpleGraph/Clique): add theorems about cliques and induced graphs --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 22/0 Mathlib/Combinatorics/SimpleGraph/Clique.lean 1 9 ['Rida-Hamadani', 'SnirBroshi', 'github-actions'] nobody 1
7-23441
7 days ago
10-47886
10 days ago
10-47875
10 days
36416 j-loreaux
author:j-loreaux
 feat(Analysis/CStarAlgebra): norms of sums of orthogonal selfadjoint elements --- - [ ] depends on: #36407 - [ ] depends on: #37569 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis maintainer-merge 130/1 Mathlib/Algebra/Star/BigOperators.lean,Mathlib/Algebra/Star/SelfAdjoint.lean,Mathlib/Analysis/CStarAlgebra/Fuglede.lean,Mathlib/Analysis/CStarAlgebra/GelfandDuality.lean 4 22 ['github-actions', 'grunweg', 'j-loreaux', 'loefflerd', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'themathqueen'] loefflerd
assignee:loefflerd
 1
6-72891
6 days ago
7-2066
7 days ago
12-67485
12 days
37840 tb65536
author:tb65536
 chore(RingTheory/Localization/AtPrime/Basic): use `under` instead of `comap (algebraMap R S)` This PR switches over from `comap (algebraMap R S)` to `under`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory t-algebra
label:t-algebra$
 162/144 Mathlib/AlgebraicGeometry/Noetherian.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Scheme.lean,Mathlib/RingTheory/DedekindDomain/Dvr.lean,Mathlib/RingTheory/Etale/QuasiFinite.lean,Mathlib/RingTheory/Frobenius.lean,Mathlib/RingTheory/Ideal/AssociatedPrime/Localization.lean,Mathlib/RingTheory/Ideal/GoingUp.lean,Mathlib/RingTheory/Ideal/Height.lean,Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean,Mathlib/RingTheory/Ideal/MinimalPrime/Localization.lean,Mathlib/RingTheory/IntegralClosure/GoingDown.lean,Mathlib/RingTheory/Jacobson/Ring.lean,Mathlib/RingTheory/KrullDimension/Polynomial.lean,Mathlib/RingTheory/LocalProperties/Injective.lean,Mathlib/RingTheory/Localization/AtPrime/Basic.lean,Mathlib/RingTheory/Localization/AtPrime/Extension.lean,Mathlib/RingTheory/Localization/Ideal.lean,Mathlib/RingTheory/QuasiFinite/Basic.lean,Mathlib/RingTheory/Spectrum/Prime/Topology.lean 19 2 ['github-actions', 'robin-carlier', 'tb65536'] erdOne
assignee:erdOne
 1
6-62923
6 days ago
7-50889
7 days ago
7-50885
7 days
34271 gasparattila
author:gasparattila
 feat(Topology/Sets): second-countability of `(Nonempty)Compacts` --- - [x] depends on: #34266 - [x] depends on: #34268 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 17/76 Mathlib/Topology/MetricSpace/Closeds.lean,Mathlib/Topology/Sets/VietorisTopology.lean 2 8 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'scholzhannah'] mcdoll
assignee:mcdoll
 1
6-62531
6 days ago
8-64413
8 days ago
15-36447
15 days
36401 JovanGerb
author:JovanGerb
 feat(positivity): positivity extension for `a - b` This PR adds support in `positivity` for proving things about subtraction. For example, if the goal is `0 < a - b`, and there is a local hypothesis of type `b < a`, then we close the goal. The motivation is that we want `positivity` to be a flexible tactic. So, when trying to prove `0 < a - b` using a local hypothesis, we should look for the simp normal form of this, which is `b < a`. --- [Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Can.20I.20make.20positivity.20work.20for.20this.3F/near/578277240) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta maintainer-merge 63/26 Mathlib/Analysis/Calculus/Taylor.lean,Mathlib/Analysis/Complex/AbelLimit.lean,Mathlib/Analysis/Complex/BorelCaratheodory.lean,Mathlib/Analysis/Complex/Hadamard.lean,Mathlib/Analysis/Convex/BetweenList.lean,Mathlib/Analysis/SpecialFunctions/Log/Deriv.lean,Mathlib/Analysis/SpecificLimits/FloorPow.lean,Mathlib/Geometry/Manifold/Riemannian/PathELength.lean,Mathlib/Tactic/Positivity/Basic.lean,MathlibTest/positivity.lean 10 10 ['JovanGerb', 'github-actions', 'hrmacbeth', 'j-loreaux', 'joneugster', 'leanprover-radar'] joneugster
assignee:joneugster
 1
6-61412
6 days ago
6-65325
6 days ago
24-36217
24 days
37111 tannerduve
author:tannerduve
 feat(Computability): add Nat.PrimrecIn and PrimrecIn - Add `Nat.PrimrecIn`: primitive recursive functions relative to a set of oracles - Add `PrimrecIn`: lifts `Nat.PrimrecIn` to `Primcodable` types A `PrimrecIn` version of `RecursiveIn.iff_nat` (i.e., `PrimrecIn O (f : ℕ → ℕ) ↔ Nat.PrimrecIn O f`) is left as future work as it requires proving `Nat.PrimrecIn O Nat.pred`, which needs additional API for `Nat.PrimrecIn`. --- Split out from #34937 as requested in review. - [x] depends on: #37061 t-computability new-contributor awaiting-author 24/0 Mathlib/Computability/RecursiveIn.lean 1 14 ['Komyyy', 'bryangingechen', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'tannerduve'] nobody 1
6-26253
6 days ago
7-39112
7 days ago
1-79421
1 day
30526 SnirBroshi
author:SnirBroshi
 chore(Logic/Relation): use `≤` to spell subrelation Replace every `∀ x y, r x y → r' x y` with `r ≤ r'` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic awaiting-author merge-conflict 161/136 Mathlib.lean,Mathlib/Algebra/Category/Grp/FilteredColimits.lean,Mathlib/Algebra/Category/ModuleCat/FilteredColimits.lean,Mathlib/Algebra/Category/MonCat/FilteredColimits.lean,Mathlib/CategoryTheory/Action.lean,Mathlib/CategoryTheory/ConnectedComponents.lean,Mathlib/CategoryTheory/Filtered/Connected.lean,Mathlib/CategoryTheory/IsConnected.lean,Mathlib/CategoryTheory/Limits/Final.lean,Mathlib/CategoryTheory/Limits/Types/Coequalizers.lean,Mathlib/CategoryTheory/Limits/Types/Filtered.lean,Mathlib/Combinatorics/Enumerative/DyckWord.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/Connected.lean,Mathlib/Computability/ContextFreeGrammar.lean,Mathlib/Computability/TuringMachine/Config.lean,Mathlib/Data/PFunctor/Multivariate/M.lean,Mathlib/Data/Quot.lean,Mathlib/FieldTheory/PerfectClosure.lean,Mathlib/GroupTheory/FreeGroup/Basic.lean,Mathlib/Logic/Relation.lean,Mathlib/Order/Basic.lean,Mathlib/Order/Defs/Prop.lean,Mathlib/Order/Interval/Finset/Basic.lean,Mathlib/Order/WellFoundedSet.lean,Mathlib/Topology/Gluing.lean 25 20 ['SnirBroshi', 'Vierkantor', 'eric-wieser', 'github-actions', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'thorimur', 'vihdzp'] Vierkantor
assignee:Vierkantor
 1
6-21637
6 days ago
21-34669
21 days ago
61-68818
61 days
35622 SnirBroshi
author:SnirBroshi
 feat(Logic/Function/Basic): `onFun` and `swap` preserve relation properties --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic 141/19 Mathlib/Data/DFinsupp/WellFounded.lean,Mathlib/Logic/Function/Basic.lean,Mathlib/Logic/Function/Defs.lean,Mathlib/Order/Defs/Unbundled.lean,Mathlib/Order/OrderIsoNat.lean,Mathlib/Order/RelClasses.lean,Mathlib/Order/WellFounded.lean,Mathlib/Order/WithBot.lean 8 7 ['SnirBroshi', 'github-actions', 'leanprover-radar', 'vihdzp'] nobody 1
6-10626
6 days ago
42-1049
42 days ago
53-71289
53 days
36693 euprunin
author:euprunin
 chore: golf using `grind` The goal of this PR is to decrease the number of times lemmas are called explicitly. Any decrease in compilation time is a welcome side effect, although it is not a primary objective. Trace profiling results (differences <30 ms considered measurement noise): * `Equiv.Perm.ofSubtype_swap_eq`: unchanged 🎉 * `Filter.hasBasis_biInf_of_directed'`: unchanged 🎉 Profiled using `set_option trace.profiler true in`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 2/10 Mathlib/GroupTheory/Perm/Support.lean 1 4 ['artie2000', 'chenson2018', 'euprunin', 'github-actions'] nobody 2
5-71736
5 days ago
32-27904
32 days ago
32-27893
32 days
33506 Rida-Hamadani
author:Rida-Hamadani
 feat(SimpleGraph): construct a cycle of two distinct paths with same start and end Co-authored-by: Vlad Tsyrklevich --- - [x] depends on: #33249 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics awaiting-author 109/1 Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Decomp.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Operations.lean,Mathlib/Data/List/Basic.lean,Mathlib/Data/List/Nodup.lean 5 23 ['Rida-Hamadani', 'YaelDillies', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'vlad902'] nobody 1
5-18733
5 days ago
6-71408
6 days ago
13-61634
13 days
36385 CoolRmal
author:CoolRmal
 feat: a sequential and countably compact space is sequentially compact The main result proved in this PR is that a sequential and countably compact space is sequentially compact. We also prove some lemmas: 1. If `f` is an embedding, then `A` is sequentially compact iff `f '' A` is sequentially compact. This result is then used to show the equivalence of `IsSeqCompact A` and `SeqCompactSpace A`. 2. If `f` is inducing, then `A` is countably compact iff `f '' A` is countably compact. This result is then used to show the equivalence of `IsCountablyCompact A` and `CountablyCompactSpace A`. 3. If `f` converges and `g` is another function such that `g x ∈ closure {f x}` for all `x`, then `g` also converges. --- - [x] depends on: #36174 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 146/13 Mathlib/Topology/Compactness/CountablyCompact.lean,Mathlib/Topology/Inseparable.lean,docs/references.bib 3 33 ['ADedecker', 'CoolRmal', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'scholzhannah'] PatrickMassot
assignee:PatrickMassot
 1
4-81294
4 days ago
4-81352
4 days ago
16-71131
16 days
34854 GrigorenkoPV
author:GrigorenkoPV
 chore(Combinatorics/Enumerative/Catalan): split into `Basic` & `Tree` --- Split off from #34853 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics maintainer-merge 225/194 Mathlib.lean,Mathlib/Combinatorics/Enumerative/Catalan.lean,Mathlib/Combinatorics/Enumerative/Catalan/Basic.lean,Mathlib/Combinatorics/Enumerative/Catalan/Tree.lean,Mathlib/Combinatorics/Enumerative/DyckWord.lean,Mathlib/RingTheory/PowerSeries/Catalan.lean 6 6 ['SnirBroshi', 'YaelDillies', 'github-actions', 'mathlib-merge-conflicts', 'vihdzp'] nobody 1
4-60796
4 days ago
4-60793
4 days ago
45-59230
45 days
37506 wwylele
author:wwylele
 feat(Analysis/InnerProductSpace): singleton basis for 1d space This was brought up in #36462. Similar to existing `FiniteDimensional.basisSingleton`, this provides a OrthonormalBasis version. Also adds simp lemma for `∀ (i j : ι), P i j` for subsingleton `ι`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis maintainer-merge 49/4 Mathlib/Analysis/InnerProductSpace/Orthonormal.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/Connected.lean,Mathlib/Combinatorics/SimpleGraph/Diam.lean,Mathlib/Logic/Basic.lean 5 36 ['eric-wieser', 'github-actions', 'leanprover-radar', 'loefflerd', 'themathqueen', 'wwylele'] loefflerd
assignee:loefflerd
 2
4-51421
4 days ago
11-52459
11 days ago
15-12699
15 days
37562 IvanRenison
author:IvanRenison
 feat(Combinatorics/SimpleGraph): add several lemmas about when `Walk.bypass` and `Walk.cycleBypass` do nothing Co-authored-by: Vlad Tsyrklevich --- - [ ] depends on: #37505 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-combinatorics 55/0 Mathlib/Combinatorics/SimpleGraph/Paths.lean 1 7 ['IvanRenison', 'SnirBroshi', 'github-actions', 'mathlib-dependent-issues', 'vlad902'] nobody 1
4-47174
4 days ago
14-34870
14 days ago
0-504
8 minutes
37592 erdOne
author:erdOne
 feat: set up API for `ConvexSpace` We introduce `sConvexCombo` and the indexed version `iConvexCombo` as the main API for `ConvexSpace` and prove lemmas around the new definitions. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra large-import maintainer-merge awaiting-author
label:t-algebra$
 452/133 Mathlib/Analysis/Convex/MetricSpace.lean,Mathlib/LinearAlgebra/ConvexSpace.lean,Mathlib/LinearAlgebra/ConvexSpace/AffineSpace.lean 3 37 ['YaelDillies', 'erdOne', 'faenuccio', 'github-actions'] faenuccio
assignee:faenuccio
 1
4-46401
4 days ago
9-74028
9 days ago
3-64638
3 days
34805 DavidLedvinka
author:DavidLedvinka
 feat(Tactic): generalize ofScientific NormNum extension to `DivisionSemiring` Co-authored-by: @hrmacbeth t-meta 68/20 Mathlib/Tactic/NormNum/Inv.lean,Mathlib/Tactic/NormNum/OfScientific.lean,MathlibTest/norm_num.lean 3 26 ['DavidLedvinka', 'JovanGerb', 'b-mehta', 'eric-wieser', 'github-actions', 'mathlib-merge-conflicts', 'thorimur'] thorimur
assignee:thorimur
 1
4-10123
4 days ago
26-27572
26 days ago
46-68973
46 days
37678 vihdzp
author:vihdzp
 chore(Dynamics/FixedPoints/Defs): create `Defs` file --- I got a large import warning on another PR for simply importing the definition `Function.fixedPoints`, which I found rather silly. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-dynamics tech debt maintainer-merge 67/44 Mathlib.lean,Mathlib/Dynamics/FixedPoints/Basic.lean,Mathlib/Dynamics/FixedPoints/Defs.lean,Mathlib/Logic/Function/Defs.lean 4 2 ['Ruben-VandeVelde', 'github-actions'] urkud
assignee:urkud
 1
3-68508
3 days ago
11-18796
11 days ago
11-19363
11 days
36965 vihdzp
author:vihdzp
 chore(SetTheory/Cardinal): tweak `succ` lemmas We leave the `SuccOrder` instance unexposed. It doesn't have any particularly good def-eqs, it's simply defined as the infimum of all larger cardinals. We also golf some surrounding theorems. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory maintainer-merge 54/61 Mathlib/LinearAlgebra/Dimension/Basic.lean,Mathlib/Order/SuccPred/CompleteLinearOrder.lean,Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/Cardinal/Order.lean,Mathlib/SetTheory/Ordinal/Basic.lean 5 4 ['YaelDillies', 'github-actions', 'mathlib-merge-conflicts'] b-mehta
assignee:b-mehta
 1
3-64558
3 days ago
3-82415
3 days ago
25-76614
25 days
37138 dtumad
author:dtumad
 feat(Data/FinEnum): instances for standard signed and unsigned integer types Adds `FinEnum` instances for `UIntN`/`IntN` for various `N`, and for platform sized integers. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor maintainer-merge 45/0 Mathlib/Data/FinEnum.lean 1 11 ['dtumad', 'github-actions', 'joneugster', 'linesthatinterlace'] joneugster
assignee:joneugster
 1
3-62930
3 days ago
16-44715
16 days ago
20-80937
20 days
37389 martinwintermath
author:martinwintermath
 chore(LinearAlgebra/SesquilinearForm): generalize `orthogonalBilin` in order to simplify definition of `orthogonal` - generalize `Submodule.orthogonalBilin` to `CommSemiring` and `AddCommMonoid`, and to general sesquilinear forms with inputs from different modules. This enables subsequent changes. - redefine `BilinForm.orthogonal` in terms of `orthogonalBilin`. - reorder arguments of `Submodule.orthogonalBilin` to match other instances of duality across mathlib. For comparison Before ```lean4 Submodule.orthogonalBilin.{u_1, u_2, u_5, u_6} {R : Type u_1} {R₁ : Type u_2} {M : Type u_5} {M₁ : Type u_6} [CommRing R] [CommRing R₁] [AddCommGroup M₁] [Module R₁ M₁] [AddCommGroup M] [Module R M] {I₁ I₂ : R₁ →+* R} (N : Submodule R₁ M₁) (B : M₁ →ₛₗ[I₁] M₁ →ₛₗ[I₂] M) : Submodule R₁ M₁ ``` After ```lean4 Submodule.orthogonalBilin.{u_1, u_2, u_3, u_5, u_6, u_7} {R : Type u_1} {R₁ : Type u_2} {R₂ : Type u_3} {M : Type u_5} {M₁ : Type u_6} {M₂ : Type u_7} [CommSemiring R] [CommSemiring R₁] [CommSemiring R₂] [AddCommMonoid M] [Module R M] [AddCommMonoid M₁] [Module R₁ M₁] [AddCommMonoid M₂] [Module R₂ M₂] {I₁ : R₁ →+* R} {I₂ : R₂ →+* R} (B : M₁ →ₛₗ[I₁] M₂ →ₛₗ[I₂] M) (N : Submodule R₁ M₁) : Submodule R₂ M₂ ``` A few fixes in other files have been necessary as well. This is an extract from #37381. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 29/21 Mathlib/Algebra/Lie/InvariantForm.lean,Mathlib/LinearAlgebra/BilinearForm/Orthogonal.lean,Mathlib/LinearAlgebra/QuadraticForm/Basic.lean,Mathlib/LinearAlgebra/RootSystem/Finite/Nondegenerate.lean,Mathlib/LinearAlgebra/SesquilinearForm/Basic.lean 5 8 ['eric-wieser', 'github-actions', 'martinwintermath', 'themathqueen', 'vihdzp'] ocfnash
assignee:ocfnash
 1
3-59978
3 days ago
4-32488
4 days ago
17-22758
17 days
36954 FMLJohn
author:FMLJohn
 feat(Topology/ClosedBases): `TopologicalSpace.IsClosedBasis` and `TopologicalSpace.IsClosedSubbasis s` In this pull request, I have defined closed bases and closed subbases of topologies, and proved some basic properties of them. ## Main definitions * `TopologicalSpace.IsClosedBasis s`: A closed basis of a topological space `α` is a collection of closed sets `s : Set (Set α)` such that every closed subset of `α` can be written as an intersection of elements of `s`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 117/0 Mathlib.lean,Mathlib/Topology/Bases.lean,Mathlib/Topology/ClosedBases.lean 3 19 ['github-actions', 'scholzhannah'] PatrickMassot
assignee:PatrickMassot
 1
3-57329
3 days ago
8-71117
8 days ago
23-36909
23 days
36155 grunweg
author:grunweg
 feat: custom elaborators for TangentSpace and tangentMap(Within) And use these to golf the differential geometry files a bit further. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry t-meta 85/30 Mathlib/Geometry/Manifold/ContMDiffMFDeriv.lean,Mathlib/Geometry/Manifold/GroupLieAlgebra.lean,Mathlib/Geometry/Manifold/IntegralCurve/Basic.lean,Mathlib/Geometry/Manifold/MFDeriv/SpecificFunctions.lean,Mathlib/Geometry/Manifold/MFDeriv/Tangent.lean,Mathlib/Geometry/Manifold/Notation.lean,Mathlib/Topology/FiberBundle/Constructions.lean,MathlibTest/DifferentialGeometry/Notation/Basic.lean 8 5 ['github-actions', 'grunweg', 'mathlib-merge-conflicts', 'ocfnash'] PatrickMassot
assignee:PatrickMassot
 1
3-56055
3 days ago
3-55849
3 days ago
41-64296
41 days
34969 kim-em
author:kim-em
 feat(RingTheory/HopfAlgebra): prove antipode is antihomomorphism This PR proves that the antipode of a Hopf algebra is an antihomomorphism: `antipode (a * b) = antipode b * antipode a`. The proof uses the convolution algebra structure on `(A ⊗ A) →ₗ[R] A` and shows that `S ∘ μ` and `μ ∘ (S ⊗ S) ∘ comm` are both convolution inverses of `μ`, hence they must be equal by uniqueness of inverses. This resolves a TODO listed in the file header. 🤖 Prepared with Claude Code t-ring-theory LLM-generated delegated 85/3 Mathlib/RingTheory/HopfAlgebra/Basic.lean 1 21 ['YaelDillies', 'github-actions', 'kim-em', 'mathlib-bors', 'riccardobrasca'] riccardobrasca
assignee:riccardobrasca
 1
3-53108
3 days ago
24-73328
24 days ago
42-13893
42 days
35820 smmercuri
author:smmercuri
 feat: unit lemmas and embedding for `FiniteAdeleRing` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 42/4 Mathlib/RingTheory/DedekindDomain/FiniteAdeleRing.lean 1 11 ['Multramate', 'Ruben-VandeVelde', 'github-actions', 'smmercuri'] mattrobball
assignee:mattrobball
 1
3-48311
3 days ago
3-47158
3 days ago
45-70920
45 days
36891 vihdzp
author:vihdzp
 feat(SetTheory/Ordinal/Exponential): characterization of `a ^ b = 1` Used in the CGT repo. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory 12/0 Mathlib/SetTheory/Ordinal/Exponential.lean 1 6 ['SnirBroshi', 'github-actions', 'vihdzp'] alreadydone
assignee:alreadydone
 1
3-14930
3 days ago
23-16411
23 days ago
27-71608
27 days
36664 SnirBroshi
author:SnirBroshi
 feat(SetTheory/Ordinal/Commute): characterize when ordinal addition commutes --- The proof is from ["Cardinal and Ordinal Numbers"](https://en.wikipedia.org/wiki/Cardinal_and_Ordinal_Numbers). A similar fact for multiplication is mentioned on [Wikipedia](https://en.wikipedia.org/wiki/Ordinal_arithmetic). [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory 51/0 Mathlib.lean,Mathlib/SetTheory/Ordinal/Commute.lean,docs/references.bib 3 20 ['SnirBroshi', 'github-actions', 'mathlib-merge-conflicts', 'plp127', 'vihdzp'] vihdzp
assignee:vihdzp
 1
3-10626
3 days ago
32-4006
32 days ago
32-59110
32 days
33928 jsm28
author:jsm28
 feat(Combinatorics/Tiling/TileSet): indexed families of tiles Define the type `TileSet` for indexed families of tiles (in a discrete context), and some associated definitions (including `symmetryGroup`) and API lemmas. `TileSet` can be used for tilings of the whole space; for tilings of part of the space; for patches of tiles (extracted from a tiling by considering tiles meeting some set of points, or considered on their own without extracting from a tiling); for multiple tilings (covering the space more than once). In particular, the fact that people study multiple tilings provides a clear justification for using indexed families rather than sets of tiles, and basic definitions and API lemmas generally work for all these different uses of `TileSet` (sometimes with weak constraints such as tiles being finite, nonempty and only having finitely many tiles meeting any point of the space). Definitions for saying e.g. "this `TileSet` is a tiling of the whole space" are to be included in subsequent files in subsequent PRs. From AperiodicMonotilesLean. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 460/0 Mathlib.lean,Mathlib/Combinatorics/Tiling/TileSet.lean 2 23 ['Parcly-Taxel', 'b-mehta', 'eric-wieser', 'github-actions', 'jsm28', 'vihdzp'] nobody 1
3-10625
3 days ago
93-27731
93 days ago
93-27720
93 days
34092 staroperator
author:staroperator
 feat(SetTheory/ZFC): properties of `ZFSet.omega` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory 77/10 Mathlib/SetTheory/ZFC/Basic.lean,Mathlib/SetTheory/ZFC/Ordinal.lean,Mathlib/SetTheory/ZFC/PSet.lean 3 25 ['Komyyy', 'github-actions', 'mathlib4-merge-conflict-bot', 'staroperator', 'vihdzp'] nobody 1
3-10624
3 days ago
77-32534
77 days ago
88-77938
88 days
37972 vihdzp
author:vihdzp
 chore: deprecate various theorems about `Ordinal.ToType` We should generally be writing theorems about "well-orders of order type `o`", rather than theorems about `o.ToType` (which is just one such well-order, defined via choice). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory maintainer-merge 31/18 Mathlib/CategoryTheory/Abelian/GrothendieckCategory/EnoughInjectives.lean,Mathlib/CategoryTheory/Presentable/OrthogonalReflection.lean,Mathlib/FieldTheory/CardinalEmb.lean,Mathlib/SetTheory/Cardinal/Order.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/Basic.lean 6 2 ['YaelDillies', 'github-actions'] nobody 1
2-64974
2 days ago
3-83354
3 days ago
3-86289
3 days
32889 artie2000
author:artie2000
 feat(Algebra): forgetful lemmas for `map` and `comap` on substructures * Standardise the form of forgetful lemmas for `map` and `comap` (ie, `(co)map_toSubfoo`) * Add missing lemmas of this form * Mark all such lemmas as `simp` --- - [x] depends on: #21031 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author merge-conflict
label:t-algebra$
 72/17 Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Group/Subgroup/Map.lean,Mathlib/Algebra/Module/Submodule/Map.lean,Mathlib/Algebra/Ring/Subsemiring/Basic.lean,Mathlib/Algebra/Star/Subalgebra.lean 6 30 ['YaelDillies', 'artie2000', 'github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'vihdzp'] nobody 1
2-64542
2 days ago
120-24513
120 days ago
2-56660
2 days
37053 artie2000
author:artie2000
 refactor(Analysis/Convex/Cone): use `PointedCone` in Riesz extension theorem Change the statement of the Riesz extension theorem to take a `PointedCone` rather than a `ConvexCone`. This PR is part of a series replacing `ConvexCone` with `PointedCone`. https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Replacing.20.60ConvexCone.60.20with.20.60PointedCone.60/near/581184307 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-convex-geometry maintainer-merge 15/12 Mathlib/Analysis/Convex/Cone/Extension.lean,Mathlib/Geometry/Convex/Cone/Pointed.lean 2 8 ['YaelDillies', 'artie2000', 'github-actions', 'mathlib-merge-conflicts', 'ocfnash'] nobody 1
2-52018
2 days ago
2-52046
2 days ago
22-7072
22 days
37505 IvanRenison
author:IvanRenison
 feat(Combinatorics/SimpleGraph): add lemma `SimpleGraph.length_cycleBypass_le` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 3/0 Mathlib/Combinatorics/SimpleGraph/Paths.lean 1 4 ['IvanRenison', 'Rida-Hamadani', 'YaelDillies', 'github-actions'] YaelDillies
assignee:YaelDillies
 1
2-38509
2 days ago
4-17452
4 days ago
15-19683
15 days
34245 staroperator
author:staroperator
 feat(Data/Set): add `Set.Uncountable` There are `Set` specialized shortcuts `Set.Finite`, `Set.Infinite` and `Set.Countable`, but lacking `Set.Uncountable`. I find this useful in #34246. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 82/4 Mathlib/Analysis/Real/Cardinality.lean,Mathlib/Data/Set/Countable.lean,Mathlib/SetTheory/Cardinal/Basic.lean 3 18 ['github-actions', 'joneugster', 'staroperator', 'vihdzp'] joneugster
assignee:joneugster
 1
2-29421
2 days ago
2-29534
2 days ago
14-50677
14 days
37076 ertwro
author:ertwro
 feat(Combinatorics/SimpleGraph/Hasse): Hasse diagram is triangle-free Add `SimpleGraph.hasse_cliqueFree_three`: the Hasse diagram of a preorder is triangle-free (`CliqueFree 3`). This is the graph-theoretic formulation of `not_covBy_of_lt_of_lt`: if `a ⋖ b` and `b ⋖ c`, then `¬ a ⋖ c`, so no three elements can be pairwise adjacent in the Hasse diagram. The proof extracts three vertices from a hypothetical 3-clique, case-splits on the covering directions (8 cases), and closes each by `not_covBy_of_lt_of_lt` (6 transitive cases) or `lt_asymm` (2 cyclic cases). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor awaiting-author 11/0 Mathlib/Combinatorics/SimpleGraph/Hasse.lean 1 20 ['Rida-Hamadani', 'SnirBroshi', 'ertwro', 'github-actions', 'vlad902'] nobody 1
2-26889
2 days ago
15-65772
15 days ago
8-9738
8 days
36840 SnirBroshi
author:SnirBroshi
 feat(SetTheory/Ordinal/Arithmetic): a few ordinal division lemmas --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory 27/8 Mathlib/SetTheory/Ordinal/Arithmetic.lean 1 6 ['SnirBroshi', 'github-actions', 'vihdzp'] nobody 1
2-10626
2 days ago
29-8158
29 days ago
29-8147
29 days
36308 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Subgraph): a couple of `subgraphOfAdj` lemmas Also golf a lemma (it's one line longer but it looks simpler to me). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics maintainer-merge 14/5 Mathlib/Combinatorics/SimpleGraph/Subgraph.lean 1 4 ['SnirBroshi', 'YaelDillies', 'github-actions'] b-mehta
assignee:b-mehta
 1
2-10165
2 days ago
40-76223
40 days ago
40-76212
40 days
37540 quantumsnow
author:quantumsnow
 feat(CategoryTheory/MorphismProperty/Comma): add MorphismProperty.Arrow This is needed for the category of topological pairs (#36621). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory new-contributor maintainer-merge 109/8 Mathlib/CategoryTheory/MorphismProperty/Comma.lean 1 20 ['chrisflav', 'github-actions', 'joelriou', 'quantumsnow'] robin-carlier
assignee:robin-carlier
 1
2-10157
2 days ago
2-63195
2 days ago
2-70593
2 days
35906 scp020
author:scp020
 feat(Combinatorics/SimpleGraph/Walk): chords of walks Define `Walk.IsChord` and `Walk.IsChordless` predicates in a new file `SimpleGraph/Walk/Chord.lean`. See "chord" in https://en.wikipedia.org/wiki/Glossary_of_graph_theory --- [Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Walk.2EIsChordless.20live.20in.20mathlib.3F/with/575277309) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor maintainer-merge 59/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Chord.lean 2 68 ['SnirBroshi', 'YaelDillies', 'github-actions', 'mathlib-merge-conflicts', 'scp020'] YaelDillies
assignee:YaelDillies
 1
1-59199
1 day ago
12-8455
12 days ago
36-84709
36 days
38060 vihdzp
author:vihdzp
 doc(Algebra/Order/SuccPred): remove outdated TODO Both of these lemmas were made `simp` a while ago. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) documentation t-algebra t-order easy
label:t-algebra$
 1/7 Mathlib/Algebra/Order/SuccPred.lean 1 2 ['github-actions', 'plp127'] nobody 1
1-55052
1 day ago
1-64233
1 day ago
1-64280
1 day
28684 Thmoas-Guan
author:Thmoas-Guan
 feat(RingTheory): definition of regular ring In this PR, we define regular ring as every localization is regular local ring, and proved polynomial over regular ring is regular. --- - [x] depends on: #28682 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 59/1 Mathlib/RingTheory/RegularLocalRing/Defs.lean 1 39 ['Thmoas-Guan', 'artie2000', 'erdOne', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] nobody 2
1-52814
1 day ago
11-2668
11 days ago
15-29470
15 days
37628 JadAbouHawili
author:JadAbouHawili
 chore: Rename Xor' to Xor Rename `Xor'` to `Xor` per the comment which recommended doing so after `v4.25.0-rc1` Moves: - Xor' --> Xor [#new members > Why Xor' and not Xor? Why `Or` and not `OrOp` for `Prop`? @ 💬](https://leanprover.zulipchat.com/#narrow/channel/113489-new-members/topic/Why.20Xor.27.20and.20not.20Xor.3F.20Why.20.60Or.60.20and.20not.20.60OrOp.60.20for.20.60Prop.60.3F/near/583510533) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor 75/66 Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean,Mathlib/Algebra/Ring/Int/Parity.lean,Mathlib/Algebra/Ring/Parity.lean,Mathlib/Data/Bool/Basic.lean,Mathlib/Data/Finset/Basic.lean,Mathlib/Data/Set/Disjoint.lean,Mathlib/Geometry/Manifold/IntegralCurve/ExistUnique.lean,Mathlib/GroupTheory/Index.lean,Mathlib/Logic/Basic.lean,Mathlib/NumberTheory/RatFunc/Ostrowski.lean,Mathlib/Order/SymmDiff.lean,Mathlib/Tactic/ITauto.lean,Mathlib/Topology/Algebra/Order/Archimedean.lean,Mathlib/Topology/Inseparable.lean,Mathlib/Topology/Instances/AddCircle/DenseSubgroup.lean,Mathlib/Topology/Separation/Basic.lean,Mathlib/Topology/Separation/Profinite.lean,MathlibTest/itauto.lean 18 20 ['JadAbouHawili', 'Ruben-VandeVelde', 'eric-wieser', 'github-actions', 'grunweg', 'mathlib-merge-conflicts'] nobody 1
1-48832
1 day ago
1-55628
1 day ago
12-2686
12 days
37464 martinwintermath
author:martinwintermath
 feat(Geometry/Convex/Cone): Minor additions to pointed cones Minor additions to pointed cones: * `PointedCone.ofSubmodule_le_ofSubmodule` and `PointedCone.ofSubmodule_lt_ofSubmodule` * `PointedCone.hull_le_span` as a short form of `Submodule.span_le_restrictScalars R≥0 R s` In preparation for #36605. Co-authored by: Artie Khovanov --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-convex-geometry 20/12 Mathlib/Geometry/Convex/Cone/Pointed.lean 1 14 ['artie2000', 'github-actions', 'martinwintermath', 'mathlib-merge-conflicts', 'ooovi'] nobody 1
1-42731
1 day ago
1-43723
1 day ago
15-399
15 days
36605 martinwintermath
author:martinwintermath
 feat(Geometry/Convex/Cone): Add lemmas about interaction of hull, span and negation Prove lemmas about the interaction of hull, span and negation. Main additions: * `PointedCone.toSubmodule` that produces a submodule with the same support given that `-C = C`. Also the corresponding `CanLift` * `PointedCone.hull_neg_pair_eq_span_singleton` proving `hull R {-x, x} = R ∙ x` (simp lemma) * `PointedCone.span_eq_hull_neg_sup_hull` proving `span R s = hull R (-s) ⊔ hull R s` * `PointedCone.mem_span` proving `x ∈ span R C ↔ ∃ p, n ∈ C, x = p - n` Considerations: there are several ways to express that a convex cone is a submodule: * `-C = C` * `-C ≤ C` or `C ≤ -C` * `C = span R C` * `C = C.lineal` The consensus was that the the first option is the most direct way to express this property, which then allows to lift to a submodule. Co-authored by: Olivia Röhrig, Kilian Rueß, Artie Khovanov --- - [ ] depends on: #37464 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR 88/12 Mathlib/Geometry/Convex/Cone/Pointed.lean 1 52 ['artie2000', 'github-actions', 'martinwintermath', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody 1
1-42397
1 day ago
16-17910
16 days ago
17-606
17 days
37915 Jun2M
author:Jun2M
 feat(Topology/CWComplex): 1-skeleton `Graph` of `CWComplex` This PR introduces `CWComplex.OneSkeletonGraph`, a graph with 0-dim cells as vertices and 1-dim cells as edges. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 136/1 Mathlib.lean,Mathlib/Topology/CWComplex/Classical/Basic.lean,Mathlib/Topology/CWComplex/Classical/Graph.lean 3 16 ['Jun2M', 'github-actions', 'jcommelin', 'scholzhannah'] jcommelin
assignee:jcommelin
 1
1-40006
1 day ago
3-43443
3 days ago
5-76063
5 days
37674 gasparattila
author:gasparattila
 feat(Topology/Sets): separation properties of `(Nonempty)Compacts` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 79/0 Mathlib/Topology/Separation/Basic.lean,Mathlib/Topology/Sets/VietorisTopology.lean 2 12 ['gasparattila', 'github-actions', 'mathlib-merge-conflicts', 'scholzhannah'] PatrickMassot
assignee:PatrickMassot
 1
1-39432
1 day ago
1-39457
1 day ago
9-85923
9 days
34875 banrovegrie
author:banrovegrie
 feat(LinearAlgebra/Matrix): add Sherman-Morrison formula Mathlib has the matrix determinant lemma (`det_add_replicateCol_mul_replicateRow` in SchurComplement.lean) but lacked the corresponding inverse formula. This PR fills that gap. - Add `Matrix.inv_add_vecMulVec`: Sherman-Morrison formula for `(A + uv^T)^{-1}` - Add `Matrix.inv_sub_vecMulVec`: subtraction variant - Add `Matrix.isUnit_det_add_vecMulVec`: invertibility under the formula's hypotheses ## Test plan - [x] `lake build` passes - [x] Lines within 100 char limit - [x] All declarations have docstrings t-algebra new-contributor awaiting-author
label:t-algebra$
 135/0 Mathlib.lean,Mathlib/LinearAlgebra/Matrix/ShermanMorrison.lean 2 12 ['Xxxjdjdid', 'banrovegrie', 'chrisflav', 'copilot-pull-request-reviewer', 'eric-wieser', 'github-actions', 'wwylele'] chrisflav
assignee:chrisflav
 1
1-38595
1 day ago
1-38595
1 day ago
69-6728
69 days
35414 joneugster
author:joneugster
 feat(Cache): Allow arguments of the form `Mathlib.Data.+` which correspond to a folder but not a file This PR continues the work from #21838. Original PR: https://github.com/leanprover-community/mathlib4/pull/21838 CI t-meta delegated 74/31 Cache/IO.lean,Cache/Main.lean 2 5 ['Vierkantor', 'github-actions', 'joneugster', 'mathlib-bors'] nobody 1
1-38200
1 day ago
1-38200
1 day ago
58-1986
58 days
37414 vasnesterov
author:vasnesterov
 feat(Tactic/ComputeAsymptotics/Multiseries): predicates for `UnitMonomial` Introduce `FirstNonzeroIsPos`, `FirstNonzeroIsNeg` and `AllZero` predicates on lists of real numbers. When applied to a list of exponents of a monomial in a well-formed basis, this trichotomy determines its asymptotic behaviour: `FirstNonzeroIsPos` means it tends to infinity, `FirstNonzeroIsNeg` means it tends to zero and `AllZero` means it tends to a constant. --- This is a part of the `compute_asymptotics` tactic (#28291). [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 148/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/ComputeAsymptotics/Multiseries/Monomial/Predicates.lean 3 15 ['WilliamCoram', 'github-actions', 'j-loreaux', 'joneugster', 'vasnesterov'] joneugster
assignee:joneugster
 1
1-37482
1 day ago
1-38235
1 day ago
15-17182
15 days
37793 YaelDillies
author:YaelDillies
 chore: camel-case `finset_sum` in lemma names and `finset_prod` too. Done with grep with the bogus replacements reverted by hand. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
 866/530 Mathlib/Algebra/Algebra/Operations.lean,Mathlib/Algebra/Algebra/Subalgebra/Operations.lean,Mathlib/Algebra/BigOperators/Associated.lean,Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/BigOperators/Finsupp/Basic.lean,Mathlib/Algebra/BigOperators/Group/Finset/Defs.lean,Mathlib/Algebra/BigOperators/Group/Finset/Lemmas.lean,Mathlib/Algebra/BigOperators/Pi.lean,Mathlib/Algebra/DirectSum/Basic.lean,Mathlib/Algebra/DirectSum/Idempotents.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/Group/EvenFunction.lean,Mathlib/Algebra/Group/ForwardDiff.lean,Mathlib/Algebra/Group/Pointwise/Set/BigOperators.lean,Mathlib/Algebra/Group/Subgroup/Finite.lean,Mathlib/Algebra/Group/Submonoid/BigOperators.lean,Mathlib/Algebra/Lie/Loop.lean,Mathlib/Algebra/LinearRecurrence.lean,Mathlib/Algebra/Module/LocalizedModule/Int.lean,Mathlib/Algebra/Module/Submodule/LinearMap.lean,Mathlib/Algebra/Module/Submodule/Pointwise.lean,Mathlib/Algebra/Module/Torsion/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Degree.lean,Mathlib/Algebra/MonoidAlgebra/MapDomain.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/MvPolynomial/Degrees.lean,Mathlib/Algebra/Order/Antidiag/Nat.lean,Mathlib/Algebra/Order/BigOperators/Group/Finset.lean,Mathlib/Algebra/Polynomial/BigOperators.lean,Mathlib/Algebra/Polynomial/Bivariate.lean,Mathlib/Algebra/Polynomial/Coeff.lean,Mathlib/Algebra/Polynomial/EraseLead.lean,Mathlib/Algebra/Polynomial/Eval/Defs.lean,Mathlib/Algebra/Polynomial/Eval/Degree.lean,Mathlib/Algebra/Polynomial/Expand.lean,Mathlib/Algebra/Polynomial/FieldDivision.lean,Mathlib/Algebra/Polynomial/HasseDeriv.lean,Mathlib/Algebra/Polynomial/Lifts.lean,Mathlib/Algebra/Polynomial/SumIteratedDerivative.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Proper.lean,Mathlib/AlgebraicGeometry/SpreadingOut.lean,Mathlib/Analysis/CStarAlgebra/ApproximateUnit.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/NonUnital.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Unital.lean,Mathlib/Analysis/Calculus/ContDiff/FaaDiBruno.lean,Mathlib/Analysis/Calculus/Deriv/Mul.lean,Mathlib/Analysis/Calculus/FDeriv/Analytic.lean,Mathlib/Analysis/Calculus/FDeriv/Mul.lean,Mathlib/Analysis/Calculus/LogDeriv.lean,Mathlib/Analysis/Calculus/Rademacher.lean,Mathlib/Analysis/Calculus/Taylor.lean,Mathlib/Analysis/Distribution/SchwartzSpace/Deriv.lean,Mathlib/Analysis/Fourier/AddCircle.lean,Mathlib/Analysis/Fourier/FourierTransformDeriv.lean,Mathlib/Analysis/LocallyConvex/WithSeminorms.lean,Mathlib/Analysis/MeanInequalities.lean,Mathlib/Analysis/MeanInequalitiesPow.lean,Mathlib/Analysis/Normed/Field/Approximation.lean,Mathlib/Analysis/Normed/Group/FunctionSeries.lean,Mathlib/Analysis/Normed/Group/Tannery.lean,Mathlib/Analysis/Normed/Group/Ultra.lean,Mathlib/Analysis/Normed/Lp/lpSpace.lean,Mathlib/Analysis/Normed/Module/FiniteDimension.lean,Mathlib/Analysis/Normed/Ring/InfiniteProd.lean,Mathlib/Analysis/Normed/Ring/InfiniteSum.lean,Mathlib/Analysis/Normed/Unbundled/FiniteExtension.lean,Mathlib/Analysis/SpecialFunctions/Log/Summable.lean,Mathlib/Analysis/SpecialFunctions/Pochhammer.lean,Mathlib/Analysis/SpecialFunctions/Pow/NNReal.lean,Mathlib/Analysis/SpecialFunctions/Pow/Real.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Chebyshev/ChebyshevGauss.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Chebyshev/RootsExtrema.lean,Mathlib/Analysis/SpecificLimits/Normed.lean,Mathlib/Combinatorics/Hindman.lean,Mathlib/Combinatorics/SimpleGraph/LapMatrix.lean,Mathlib/Computability/AkraBazzi/SumTransform.lean,Mathlib/Data/DFinsupp/BigOperators.lean,Mathlib/Data/ENNReal/BigOperators.lean,Mathlib/Data/Finsupp/Basic.lean,Mathlib/Data/Nat/Choose/Lucas.lean,Mathlib/Data/Nat/Factorization/Basic.lean,Mathlib/Data/Nat/Squarefree.lean,Mathlib/Data/ZMod/Units.lean,Mathlib/FieldTheory/ChevalleyWarning.lean,Mathlib/FieldTheory/IntermediateField/Basic.lean,Mathlib/FieldTheory/Minpoly/MinpolyDiv.lean,Mathlib/Geometry/Manifold/Algebra/Monoid.lean,Mathlib/GroupTheory/Congruence/BigOperators.lean,Mathlib/LinearAlgebra/ConvexSpace/AffineSpace.lean,Mathlib/LinearAlgebra/DFinsupp.lean,Mathlib/LinearAlgebra/Dimension/LinearMap.lean,Mathlib/LinearAlgebra/Finsupp/Pi.lean,Mathlib/LinearAlgebra/Lagrange.lean,Mathlib/LinearAlgebra/Matrix/Charpoly/Coeff.lean,Mathlib/LinearAlgebra/Matrix/Ideal.lean,Mathlib/LinearAlgebra/Matrix/Polynomial.lean,Mathlib/LinearAlgebra/TensorProduct/Vanishing.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/Basic.lean,Mathlib/MeasureTheory/Function/ConditionalLExpectation.lean 218 31 ['Vierkantor', 'YaelDillies', 'adomani', 'github-actions', 'mathlib-bors', 'mathlib-merge-conflicts', 'themathqueen'] nobody 1
1-30392
1 day ago
1-47347
1 day ago
6-60672
6 days
37868 Jun2M
author:Jun2M
 feat(Combinatorics/Graph): map on `Graph` This PR introduces vertex map on graphs, `map`. Co-authored-by: Peter Nelson [apn.uni@gmail.com](mailto:apn.uni@gmail.com) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics maintainer-merge 115/0 Mathlib.lean,Mathlib/Combinatorics/Graph/Maps.lean 2 4 ['YaelDillies', 'github-actions', 'mathlib-merge-conflicts'] nobody 1
1-14294
1 day ago
1-14349
1 day ago
7-1457
7 days
36202 vihdzp
author:vihdzp
 feat: more theorems on the Cantor normal form We also remove some redundant assumptions. Used in the CGT repo. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory 68/17 Mathlib/SetTheory/Ordinal/CantorNormalForm.lean 1 16 ['SnirBroshi', 'github-actions', 'mathlib-merge-conflicts', 'vihdzp'] nobody 1
1-10626
1 day ago
22-66793
22 days ago
41-60602
41 days
36443 Fieldnote-Echo
author:Fieldnote-Echo
 feat(Combinatorics/SimpleGraph): add SimpleGraph.ball (open metric ball) Add `SimpleGraph.ball`, the open ball in the graph extended metric. ## Design decisions - **Open ball** (strict `<`, not `≤`): `ball c ⊤` coincides with the connected component of `c`, whereas a closed ball would give `closedBall c ⊤ = univ`. - **Named `SimpleGraph.ball`** (not `eball`): since `dist`-valued balls are less natural for disconnected graphs, the `e` prefix is unnecessary. - **Graph-specific** (not via `PseudoEMetricSpace`): avoids importing `ℝ`. AI assistance: Claude (Opus 4.6) helped draft and iterate on the implementation. I reviewed the code line by line and vouch for the final contents. Discussed on [Zulip](https://leanprover.zulipchat.com/#narrow/channel/252551-graph-theory/topic/SimpleGraph.20metric.20balls/with/577846803). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor LLM-generated 59/3 Mathlib/Combinatorics/SimpleGraph/Metric.lean 1 36 ['Fieldnote-Echo', 'Rida-Hamadani', 'SnirBroshi', 'github-actions', 'lauramonk', 'vlad902'] awainverse and b-mehta
assignee:b-mehta assignee:awainverse
 1
1-10057
1 day ago
37-44641
37 days ago
37-44630
37 days
37545 vihdzp
author:vihdzp
 feat: ℵ_ univ = univ --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory 74/4 Mathlib/SetTheory/Cardinal/Aleph.lean,Mathlib/SetTheory/Cardinal/Regular.lean 2 7 ['github-actions', 'mathlib-merge-conflicts', 'mattdiamond', 'plp127', 'vihdzp'] alreadydone
assignee:alreadydone
 1
1-10052
1 day ago
3-8509
3 days ago
14-44359
14 days
37400 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Acyclic): endpoints of a path have at most one neighbor in the path --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics maintainer-merge 15/0 Mathlib/Combinatorics/SimpleGraph/Acyclic.lean 1 5 ['Rida-Hamadani', 'Ruben-VandeVelde', 'SnirBroshi', 'github-actions'] nobody 2
1-4886
1 day ago
17-4450
17 days ago
17-4439
17 days
37247 yuma-mizuno
author:yuma-mizuno
 feat(GroupTheory/MonoidLocalization): add prime transport lemmas --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory awaiting-author 75/7 Mathlib/GroupTheory/MonoidLocalization/MonoidWithZero.lean,Mathlib/RingTheory/Localization/Basic.lean,Mathlib/RingTheory/Localization/Defs.lean 3 6 ['github-actions', 'riccardobrasca'] riccardobrasca
assignee:riccardobrasca
 1
0-66306
18 hours ago
0-66306
18 hours ago
20-41780
20 days
37449 dagurtomas
author:dagurtomas
 feat(Condensed): the free light condensed module on `ℕ∪∞` is internally projective From [LeanCondensed](https://github.com/dagurtomas/LeanCondensed) Co-authored by: @jonasvanderschaaf --- - [x] depends on: #37451 - [x] depends on: #37452 - [x] depends on: #37453 - [x] depends on: #37454 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-condensed delegated 363/0 Mathlib.lean,Mathlib/Condensed/Light/Sequence.lean,Mathlib/Topology/Category/LightProfinite/Sequence.lean 3 22 ['dagurtomas', 'github-actions', 'mathlib-bors', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib-splicebot', 'riccardobrasca'] riccardobrasca
assignee:riccardobrasca
 1
0-64985
18 hours ago
0-65024
18 hours ago
3-29289
3 days
37420 artie2000
author:artie2000
 refactor: change definitions to avoid `ConvexCone` Change the definitions of `PointedCone.positive` and `PointedCone.closure` to avoid mentioning `ConvexCone`. This PR is part of a series deprecating `ConvexCone`: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Replacing.20.60ConvexCone.60.20with.20.60PointedCone.60/with/582738985 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-convex-geometry maintainer-merge 10/4 Mathlib/Analysis/Convex/Cone/Closure.lean,Mathlib/Geometry/Convex/Cone/Pointed.lean 2 3 ['YaelDillies', 'github-actions', 'mathlib-merge-conflicts', 'ooovi', 'vihdzp'] nobody 3
0-58070
16 hours ago
0-58034
16 hours ago
15-78586
15 days
37874 yuanyi-350
author:yuanyi-350
 refactor(Analysis/PSeries): simplify `Real.summable_one_div_nat_add_rpow` via asymptotics ## Summary - replace the manual eventual-positivity and limit argument in `Real.summable_one_div_nat_add_rpow` with an asymptotic-equivalence proof - use `IsEquivalent.add_const_of_norm_tendsto_atTop` together with `Asymptotics.IsEquivalent.summable_iff_nat` - add the imports needed for the asymptotics-based proof This also removes the local `set_option linter.unusedSimpArgs false` workaround from the proof. t-analysis large-import maintainer-merge 12/26 Mathlib/Analysis/PSeries.lean,Mathlib/NumberTheory/LSeries/Nonvanishing.lean 2 20 ['YaelDillies', 'github-actions', 'grunweg', 'leanprover-radar', 'themathqueen', 'yuanyi-350'] ADedecker
assignee:ADedecker
 1
0-45466
12 hours ago
0-45467
12 hours ago
4-9448
4 days
36951 mbkybky
author:mbkybky
 feat(Algebra/Module): define stably free modules We define stably free modules: a module `M` over a commutative ring `R` is called stably free if there exists a finite free module `N` over `R` such that `M ⊕ N` is free. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 67/0 Mathlib.lean,Mathlib/Algebra/Module/StablyFree/Basic.lean 2 6 ['dagurtomas', 'github-actions', 'mbkybky'] dagurtomas
assignee:dagurtomas
 1
0-41511
11 hours ago
6-59288
6 days ago
25-30377
25 days
34571 xroblot
author:xroblot
 feat(CyclotomicField/Galois): the bijection between subfields and subgroups of Dirichlet characters This PR adds the first results relating the Galois theory of cyclotomic extensions to Dirichlet characters, following Washington, _Introduction to Cyclotomic Fields_. The main result is the definition of the order-preserving bijection between intermediate fields of `ℚ(ζₙ)/ℚ` and subgroups of the group of Dirichlet characters of level `n`. --- - [x] depends on: #33878 - [x] depends on: #37108 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-algebra
label:t-algebra$
 86/2 Mathlib/FieldTheory/Normal/Defs.lean,Mathlib/NumberTheory/NumberField/Cyclotomic/Galois.lean 2 8 ['dagurtomas', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'riccardobrasca'] dagurtomas
assignee:dagurtomas
 1
0-41235
11 hours ago
0-55813
15 hours ago
14-77404
14 days
37926 e-271828
author:e-271828
 feat(Analysis/Analytic): add AnalyticAt properties for iterated dslope This PR adds three fundamental lemmas in the `AnalyticAt` namespace to establish the analyticity of the (iterated) `dslope` function: * `AnalyticAt.dslope_of_ne` * `AnalyticAt.iterate_dslope_of_ne` * `AnalyticAt.iterate_dslope` (at the singularity, using `has_fpower_series_iterate_dslope_fslope`) These properties are crucial for factoring out removable singularities iteratively while preserving analyticity. This PR was assisted by LLMs (Aristotle and Gemini). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis new-contributor 29/0 Mathlib/Analysis/Analytic/IsolatedZeros.lean 1 6 ['e-271828', 'github-actions', 'wwylele'] j-loreaux
assignee:j-loreaux
 1
0-33723
9 hours ago
5-64134
5 days ago
5-64123
5 days
34154 euprunin
author:euprunin
 chore: golf using `grind` (and add four supporting `grind` annotations) The goal of this golfing PR is to decrease the number of times lemmas are called explicitly (replacing calls to lemmas with calls to tactics). Any decrease in compilation time is a welcome side effect, although it is not a primary objective. Trace profiling results (shown if ≥10 ms before or after): * `Orientation.nonneg_inner_and_areaForm_eq_zero_iff_sameRay`: 311 ms before, 284 ms after 🎉 * `UV.compression_self`: 29 ms before, 19 ms after 🎉 * `IsSepClosed.exists_root_C_mul_X_pow_add_C_mul_X_add_C`: 405 ms before, 291 ms after 🎉 * `InnerProductGeometry.norm_add_eq_add_norm_iff_angle_eq_zero`: 425 ms before, 309 ms after 🎉 This golfing PR is batched under the following guidelines: * Up to ~5 changed files per PR * Up to ~25 changed declarations per PR * Up to ~100 changed lines per PR --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 12/34 Mathlib/Algebra/Polynomial/Degree/Defs.lean,Mathlib/Algebra/Polynomial/Degree/Operations.lean,Mathlib/Analysis/InnerProductSpace/TwoDim.lean,Mathlib/Combinatorics/SetFamily/Compression/UV.lean,Mathlib/FieldTheory/IsSepClosed.lean,Mathlib/Geometry/Euclidean/Angle/Unoriented/Basic.lean 6 24 ['Parcly-Taxel', 'Vierkantor', 'artie2000', 'chenson2018', 'euprunin', 'github-actions', 'leanprover-radar', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'tb65536'] Vierkantor
assignee:Vierkantor
 1
0-30710
8 hours ago
10-30042
10 days ago
74-54921
74 days
36774 euprunin
author:euprunin
 chore: replace long terminal `rw […]`:s (≥4 lemmas) with bare `simp`:s The goal of this PR is to decrease the number of times lemmas are called explicitly. Any decrease in compilation time is a welcome side effect, although it is not a primary objective. Trace profiling results (differences <30 ms considered measurement noise): * `Finset.lcm_union`: unchanged 🎉 * `Finset.gcd_union`: unchanged 🎉 * `Polynomial.derivative_eval₂_C`: unchanged 🎉 * `Polynomial.expand_pow`: unchanged 🎉 * `Cardinal.mk_real`: unchanged 🎉 * `Real.log_zpow`: unchanged 🎉 * `Matroid.eRank_le_encard_add_eRk_compl`: unchanged 🎉 * `DFinsupp.single_tsub`: unchanged 🎉 * `EReal.inv_neg`: unchanged 🎉 * `Finsupp.toMultiset_map`: unchanged 🎉 * `Finsupp.single_tsub`: unchanged 🎉 * `Multiset.countP_map`: unchanged 🎉 * `Nat.ascFactorial_eq_factorial_mul_choose'`: unchanged 🎉 * `Real.sign_intCast`: unchanged 🎉 * `Real.volume_eball`: unchanged 🎉 * `Real.volume_closedEBall`: unchanged 🎉 * `LFunction_ne_zero_of_not_quadratic_or_ne_one`: 295 ms before, 152 ms after 🎉 * `hasSum_one_div_nat_pow_mul_cos`: unchanged 🎉 * `inv_eq_of_aeval_divX_ne_zero`: unchanged 🎉 * `AlgebraicIndependent.aeval_comp_mvPolynomialOptionEquivPolynomialAdjoin`: unchanged 🎉 * `Ordinal.deriv_mul_eq_opow_omega0_mul`: unchanged 🎉 Profiled using `set_option trace.profiler true in`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 22/24 Mathlib/Algebra/GCDMonoid/Finset.lean,Mathlib/Algebra/Polynomial/Derivative.lean,Mathlib/Algebra/Polynomial/Expand.lean,Mathlib/Analysis/Real/Cardinality.lean,Mathlib/Analysis/SpecialFunctions/Log/Basic.lean,Mathlib/Combinatorics/Matroid/Rank/ENat.lean,Mathlib/Data/DFinsupp/Order.lean,Mathlib/Data/EReal/Inv.lean,Mathlib/Data/Finsupp/Multiset.lean,Mathlib/Data/Finsupp/Order.lean,Mathlib/Data/Multiset/Filter.lean,Mathlib/Data/Nat/Choose/Basic.lean,Mathlib/Data/Real/Sign.lean,Mathlib/MeasureTheory/Measure/Lebesgue/Basic.lean,Mathlib/NumberTheory/LSeries/Nonvanishing.lean,Mathlib/NumberTheory/ZetaValues.lean,Mathlib/RingTheory/Algebraic/Basic.lean,Mathlib/RingTheory/AlgebraicIndependent/Basic.lean,Mathlib/SetTheory/Ordinal/FixedPoint.lean 19 2 ['artie2000', 'euprunin', 'github-actions'] nobody 1
0-30341
8 hours ago
30-38867
30 days ago
30-38856
30 days
32744 NoneMore
author:NoneMore
 feat(ModelTheory/Definablity): add `DefinableFun` definition and lemmas This PR adds two basic shapes of definable sets and `DefinableFun` definition with relevant lemmas. The main result is `Set.Definable.preimage_map` asserting that the preimage of a definable set under a definable map is definable. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-logic delegated 183/0 Mathlib/ModelTheory/Definability.lean 1 70 ['NoneMore', 'Vierkantor', 'github-actions', 'mathlib-bors', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'staroperator'] nobody 2
0-28790
7 hours ago
1-38816
1 day ago
116-75216
116 days
37908 WenrongZou
author:WenrongZou
 feat(LocalField): add an instance `IsAdicComplete 𝓂[K] 𝒪[K]` In this PR, I add an instance `IsAdicComplete 𝓂[K] 𝒪[K]`. Deletions: proof_wanted: isAdicComplete. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory maintainer-merge 40/2 Mathlib/LinearAlgebra/SModEq/Basic.lean,Mathlib/NumberTheory/LocalField/Basic.lean 2 30 ['WenrongZou', 'github-actions', 'tb65536'] tb65536
assignee:tb65536
 1
0-21147
5 hours ago
0-31392
8 hours ago
6-6141
6 days
38101 b-mehta
author:b-mehta
 feat(Order/OrderIsoNat): add WellFoundedLT.antitone_chain_condition This is an easy combination of existing things, but these are sometimes hard to find, and can be tricky to apply in practice since it involves a few different ideas. Since the informal statement here shows up fairly often, it's worth having for convenience downstream. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) easy t-order 9/0 Mathlib/Order/OrderIsoNat.lean 1 1 ['github-actions', 'vihdzp'] nobody 1
0-20659
5 hours ago
0-82311
22 hours ago
0-82300
22 hours
36743 Jun2M
author:Jun2M
 feat(Combinatorics/GraphLike): introduce `GraphLike` typeclass Per discussion at ([#graph theory > HasAdj](https://leanprover.zulipchat.com/#narrow/channel/252551-graph-theory/topic/HasAdj/with/575843445)), This PR introduces the `GraphLike` typeclass to capture the notions like `dart` and `walk` across various graph objects, such as `SimpleGraph`, `Graph`, and `Digraph`. The goal is that by abstracting these core components into a typeclass, we can prove these results once for all graph-like structures rather than duplicating them across different graph types. This PR generalises #35776 to also unify `Graph`. ### Main definitions * `GraphLike α β Gr`: A typeclass parameterized by a vertex type `α`, dart type `β` and a graph type `Gr` (with `α` as an `outParam`). * `GraphLike.verts : Set α`: The set of vertices of the graph. * `GraphLike.darts : Set β`: The set of darts of the graph. * `GraphLike.Adj : α → α → Prop`: The adjacency relation, defined by default as `Nonempty (darts G u v)`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 341/0 Mathlib.lean,Mathlib/Combinatorics/Digraph/GraphLike.lean,Mathlib/Combinatorics/Graph/GraphLike.lean,Mathlib/Combinatorics/GraphLike/Basic.lean,Mathlib/Combinatorics/SimpleGraph/GraphLike.lean 5 45 ['IvanRenison', 'Jun2M', 'SnirBroshi', 'github-actions', 'lauramonk', 'mathlib-merge-conflicts'] nobody 1
0-11734
3 hours ago
0-11788
3 hours ago
30-74456
30 days
33520 NoneMore
author:NoneMore
 feat(ModelTheory/ElementarySubstructures): add a variant of Tarski-Vaught test taking sets as input There should exist an `ElementarySubstructure.copy` such that we can directly bundle the set itself instaed of its closure as an elementary substructure. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic new-contributor 91/0 Mathlib/ModelTheory/ElementarySubstructures.lean 1 9 ['Citronhat', 'NoneMore', 'fpvandoorn', 'github-actions'] nobody 1
0-10625
2 hours ago
21-65665
21 days ago
103-57669
103 days
36794 vihdzp
author:vihdzp
 doc(SetTheory/Ordinal/Principal): improve documentation The module docstring now contains a description of what an `op`-principal actually is. I've also added some additional names for discoverability. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory documentation 26/20 Mathlib/SetTheory/Ordinal/Principal.lean,Mathlib/SetTheory/Ordinal/Veblen.lean 2 8 ['SnirBroshi', 'github-actions', 'mathlib-merge-conflicts', 'vihdzp'] nobody 1
0-10625
2 hours ago
27-10973
27 days ago
29-30165
29 days
34273 gasparattila
author:gasparattila
 feat(Topology/Sets): finite sets are dense in `(Nonempty)Compacts` --- - [x] depends on: #34266 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 35/0 Mathlib/Topology/Sets/VietorisTopology.lean 1 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'scholzhannah'] nobody 1
0-10624
2 hours ago
23-40000
23 days ago
23-41239
23 days
38003 grunweg
author:grunweg
 chore(downstream_repos.yml): update physlib name and repository --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) easy CI 2/2 scripts/downstream_repos.yml 1 1 ['github-actions', 'jstoobysmith'] jcommelin
assignee:jcommelin
 1
0-10157
2 hours ago
3-49070
3 days ago
3-49059
3 days
38075 yuanyi-350
author:yuanyi-350
 refactor: golf `CStarAlgebra/Unitization`, `Complex/Trigonometric`, `Asymptotics/SpecificAsymptotics` This PR extracts three file-level refactors from #37968 into a standalone branch: - `Mathlib/Analysis/CStarAlgebra/Unitization.lean` - `Mathlib/Analysis/Complex/Trigonometric.lean` - `Mathlib/Analysis/Asymptotics/SpecificAsymptotics.lean` The goal is to make these simplifications reviewable independently of the larger batch PR. t-analysis codex LLM-generated 7/24 Mathlib/Analysis/Asymptotics/SpecificAsymptotics.lean,Mathlib/Analysis/CStarAlgebra/Unitization.lean,Mathlib/Analysis/Complex/Trigonometric.lean 3 13 ['Parcly-Taxel', 'github-actions', 'leanprover-radar', 'themathqueen', 'yuanyi-350'] j-loreaux
assignee:j-loreaux
 1
0-10155
2 hours ago
0-46678
12 hours ago
1-44790
1 day
38131 eric-wieser
author:eric-wieser
 refactor: deprecate `Finset.affineCombinationSingleWeights` This is much more verbose than `Pi.single _ 1`, and the latter has more theorems. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-euclidean-geometry 63/70 Mathlib/Analysis/Convex/Between.lean,Mathlib/Analysis/Convex/Side.lean,Mathlib/Analysis/Convex/StrictCombination.lean,Mathlib/Geometry/Euclidean/Incenter.lean,Mathlib/Geometry/Euclidean/Sphere/SecondInter.lean,Mathlib/LinearAlgebra/AffineSpace/Ceva.lean,Mathlib/LinearAlgebra/AffineSpace/Combination.lean,Mathlib/LinearAlgebra/AffineSpace/Independent.lean,Mathlib/LinearAlgebra/AffineSpace/Simplex/Basic.lean 9 1 ['github-actions', 'wwylele'] jsm28
assignee:jsm28
 1
0-10147
2 hours ago
0-30766
8 hours ago
0-31775
8 hours
38100 b-mehta
author:b-mehta
 refactor(Pointwise/Finset): use IsLeftRegular/IsRightRegular Use `IsLeftRegular`/`IsRightRegular` in `card_le_card_mul_left_of_injective` and `card_le_card_mul_right_of_injective`. Rename `smul_finset_card_le` to `card_smul_finset_le` with deprecation aliases. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 5/3 Mathlib/Algebra/Group/Pointwise/Finset/Basic.lean,Mathlib/Algebra/Group/Pointwise/Finset/Scalar.lean 2 1 ['github-actions', 'vihdzp'] nobody 1
0-4210
1 hour ago
0-83025
23 hours ago
0-83014
23 hours
38097 NoahW314
author:NoahW314
 feat: add `IndiscreteTopology` instances --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 24/0 Mathlib/Topology/Homotopy/Contractible.lean,Mathlib/Topology/Inseparable.lean,Mathlib/Topology/NoetherianSpace.lean,Mathlib/Topology/Separation/Connected.lean 4 5 ['NoahW314', 'github-actions', 'scholzhannah', 'vihdzp'] nobody 1
0-3336
55 minutes ago
0-53501
14 hours ago
0-72529
20 hours
6777 adomani
author:adomani
 chore(Co*variantClass): replace eta-expanded (· * ·), (· + ·), (· ≤ ·), (· < ·) Replace `CovariantClass X X (· * ·) (· ≤ ·)` with -> `CovariantClass X X HMul.hMul LE.le` and similarly for `HAdd`, `LT`, `Contravariant`. This PR is inspired by [Issue #6646](https://github.com/leanprover-community/mathlib4/issues/6646) and, more specifically, [this comment](https://github.com/leanprover-community/mathlib4/issues/6646#issuecomment-1692792066). Note that https://github.com/leanprover/lean4/pull/2267 would make this unnecessary --- ```bash # First sed command: # the first captured pattern is `Co*variantClass ` # the second captured pattern is `` # the third captured pattern is `+` or `*` # the fourth captured pattern is `<` or `≤` # a match for `Co*variantClass (· ·) (· ·)` becomes # `Co*variantClass replaceop replaceop` # Second sed command: similar to the first, but looks for `(Function.swap (· ·))` sed -i ' s=\(Co[ntra]*variantClass \(..*\) \2 \)(· *\([+*]\) *·) (· *\([<≤]\) *·)=\1replaceop\3 replaceop\4=g s=\(Co[ntra]*variantClass \(..*\) \2 \)(\([Functio\.swap ]*\)(· *\([+*]\) *·)) (· *\([<≤]\) *·)=\1(\3replaceop\4) replaceop\5=g s=replaceop+=HAdd.hAdd=g s=replaceop\*=HMul.hMul=g s=replaceop<=LT.lt=g s=replaceop≤=LE.le=g s=\(Co[ntra]*variantClass N N\) (· \* ·) r=\1 HMul.hMul r=g s=\(Co[ntra]*variantClass N N (swap μ)\) (· ≤ ·)=\1 LE.le=g s=\(Co[ntra]*variantClass N N\) (swap (· \* ·)) r=\1 (swap HMul.hMul) r=g s=\(CovariantClass (Filter α) (Filter α)\) (· / ·) (· ≤ ·)=\1 HDiv.hDiv LE.le=g s=\(CovariantClass (Filter α) (Filter α)\) (swap (· / ·)) (· ≤ ·)=\1 (swap HDiv.hDiv) LE.le=g s=\(Co[ntra]*variantClass .* (fun x y .> . \* .)\) (· ≤ ·)=\1 LE.le=g s=\(Co[ntra]*variantClass .* (fun x y .> . \* .)\) (· < ·)=\1 LT.lt=g s=\(Co[ntra]*variantClass [^}]*\) (· ≤ ·)=\1 LE.le=g s=\(CovariantClass .* (Filter β)\) (· • ·) LE.le=\1 HSMul.hSMul LE.le=g ' $(git ls-files '*.lean') ``` [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 703/678 Counterexamples/ZeroDivisorsInAddMonoidAlgebras.lean,Mathlib/Algebra/BigOperators/Basic.lean,Mathlib/Algebra/Bounds.lean,Mathlib/Algebra/CovariantAndContravariant.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/Group/UniqueProds.lean,Mathlib/Algebra/GroupPower/Order.lean,Mathlib/Algebra/MonoidAlgebra/Degree.lean,Mathlib/Algebra/Order/Archimedean.lean,Mathlib/Algebra/Order/Group/Abs.lean,Mathlib/Algebra/Order/Group/Defs.lean,Mathlib/Algebra/Order/Group/DenselyOrdered.lean,Mathlib/Algebra/Order/Group/MinMax.lean,Mathlib/Algebra/Order/Group/OrderIso.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Order/Interval.lean,Mathlib/Algebra/Order/Kleene.lean,Mathlib/Algebra/Order/LatticeGroup.lean,Mathlib/Algebra/Order/Module.lean,Mathlib/Algebra/Order/Monoid/Basic.lean,Mathlib/Algebra/Order/Monoid/Cancel/Defs.lean,Mathlib/Algebra/Order/Monoid/Canonical/Defs.lean,Mathlib/Algebra/Order/Monoid/Defs.lean,Mathlib/Algebra/Order/Monoid/Lemmas.lean,Mathlib/Algebra/Order/Monoid/MinMax.lean,Mathlib/Algebra/Order/Monoid/NatCast.lean,Mathlib/Algebra/Order/Monoid/OrderDual.lean,Mathlib/Algebra/Order/Monoid/Prod.lean,Mathlib/Algebra/Order/Monoid/WithTop.lean,Mathlib/Algebra/Order/Monoid/WithZero/Basic.lean,Mathlib/Algebra/Order/Monoid/WithZero/Defs.lean,Mathlib/Algebra/Order/Nonneg/Ring.lean,Mathlib/Algebra/Order/Pointwise.lean,Mathlib/Algebra/Order/Positive/Ring.lean,Mathlib/Algebra/Order/Ring/Canonical.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Order/Ring/Lemmas.lean,Mathlib/Algebra/Order/Sub/Basic.lean,Mathlib/Algebra/Order/Sub/Canonical.lean,Mathlib/Algebra/Order/Sub/Defs.lean,Mathlib/Algebra/Order/WithZero.lean,Mathlib/Algebra/Parity.lean,Mathlib/Algebra/Star/Order.lean,Mathlib/Algebra/Tropical/Basic.lean,Mathlib/Analysis/Normed/Order/Lattice.lean,Mathlib/Data/DFinsupp/Lex.lean,Mathlib/Data/DFinsupp/Order.lean,Mathlib/Data/Finset/Fold.lean,Mathlib/Data/Finsupp/Lex.lean,Mathlib/Data/Finsupp/Order.lean,Mathlib/Data/List/BigOperators/Basic.lean,Mathlib/Data/List/BigOperators/Lemmas.lean,Mathlib/Data/Multiset/Basic.lean,Mathlib/Data/Nat/Cast/Order.lean,Mathlib/Data/PNat/Basic.lean,Mathlib/Data/Real/ENNReal.lean,Mathlib/Data/Real/NNReal.lean,Mathlib/Data/Set/Semiring.lean,Mathlib/Data/Sign.lean,Mathlib/MeasureTheory/Function/LpOrder.lean,Mathlib/MeasureTheory/Function/SimpleFuncDenseLp.lean,Mathlib/MeasureTheory/Measure/MeasureSpace.lean,Mathlib/MeasureTheory/Measure/VectorMeasure.lean,Mathlib/Order/ConditionallyCompleteLattice/Group.lean,Mathlib/Order/Filter/Basic.lean,Mathlib/Order/Filter/Pointwise.lean,Mathlib/Probability/Martingale/Basic.lean,Mathlib/Probability/Process/Stopping.lean,Mathlib/RingTheory/GradedAlgebra/Basic.lean,Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/Game/Basic.lean,Mathlib/SetTheory/Game/PGame.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/Basic.lean,Mathlib/SetTheory/Ordinal/NaturalOps.lean,Mathlib/Tactic/GCongr/Core.lean,Mathlib/Tactic/Positivity/Basic.lean,Mathlib/Topology/ContinuousFunction/Algebra.lean,lean-toolchain,test/Recall.lean,test/propose.lean 81 37 ['adomani', 'alreadydone', 'digama0', 'eric-wieser', 'ericrbg', 'jcommelin', 'leanprover-bot', 'sgouezel', 'vihdzp'] nobody 1
0-323
5 minutes ago
899-36483
899 days ago
35-63136
35 days

All open PRs

Number Author Title Description Labels +/- Modified files (first 100) 📝 💬 All users who commented or reviewed Assignee(s) Updated Last status change total time in review
14720 eric-wieser
author:eric-wieser
 refactor: change `CliffordAlgebra.lift` to use quadratic maps This works towards addressing a footnote on [page 152](https://eric-wieser.github.io/thesis/eric-wieser-thesis.pdf#page=164) of my thesis. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra
label:t-algebra$
 200/167 Mathlib/LinearAlgebra/CliffordAlgebra/Basic.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Equivs.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Prod.lean,Mathlib/LinearAlgebra/QuadraticForm/Complex.lean,Mathlib/LinearAlgebra/QuadraticForm/Dual.lean,Mathlib/LinearAlgebra/QuadraticForm/Isometry.lean,Mathlib/LinearAlgebra/QuadraticForm/IsometryEquiv.lean,Mathlib/LinearAlgebra/QuadraticForm/Prod.lean,Mathlib/LinearAlgebra/QuadraticForm/QuadraticModuleCat.lean,Mathlib/LinearAlgebra/QuadraticForm/Real.lean,Mathlib/LinearAlgebra/QuadraticForm/TensorProduct/Isometries.lean 11 1 ['github-actions'] nobody
624-70993
1 year ago
unknown
0-0
0 seconds
14889 yuma-mizuno
author:yuma-mizuno
 feat(CategoryTheory/Bicategory/Monad): define monad in bicategory --- - [ ] depends on: #12107 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP blocked-by-other-PR t-category-theory 1566/12 Mathlib.lean,Mathlib/CategoryTheory/Bicategory/Functor/Oplax.lean,Mathlib/CategoryTheory/Bicategory/LocallyDiscrete.lean,Mathlib/CategoryTheory/Bicategory/Monad/Adjunction.lean,Mathlib/CategoryTheory/Bicategory/Monad/Basic.lean,Mathlib/CategoryTheory/Bicategory/Monad/Cat.lean,Mathlib/CategoryTheory/Monad/Basic.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CategoryTheory/Coherence.lean,Mathlib/Tactic/Widget/StringDiagram.lean,scripts/noshake.json,test/StringDiagram.lean,widget/src/penrose/monoidal.dsl,widget/src/penrose/monoidal.sty 14 2 ['github-actions', 'leanprover-community-mathlib4-bot'] nobody
624-70993
1 year ago
unknown
0-0
0 seconds
13847 alreadydone
author:alreadydone
 feat(EllipticCurve): the universal elliptic curve + Define the universal Weierstrass curve (`Universal.curve`) over the polynomial ring `ℤ[A₁,A₂,A₃,A₄,A₆]`, and the universal pointed elliptic curve (`Universal.pointedCurve`) over the field of fractions (`Universal.Field`) of the universal ring `ℤ[A₁,A₂,A₃,A₄,A₆,X,Y]/⟨P⟩ = Universal.Poly/⟨P⟩` (`Universal.Ring`, where `P` is the Weierstrass polynomial) with distinguished point `(X,Y)`. + Given a Weierstrass curve `W` over a commutative ring `R`, we define the specialization homomorphism `W.specialize : ℤ[A₁,A₂,A₃,A₄,A₆] →+* R`. If `(x,y)` is a point on the affine plane, we define `W.polyEval x y : Universal.Poly →+* R`, which factors through `W.ringEval x y : Universal.Ring →+* R` if `(x,y)` is on `W`. + Introduce the cusp curve `Y² = X³`, on which lies the rational point `(1,1)`, with the nice property that `ψₙ(1,1) = n`, making it easy to prove nonvanishing of the universal `ψₙ` when `n ≠ 0` by specializing to the cusp curve, which shows that `(X,Y)` is a point of infinite order on the universal pointed elliptic curve. --- - [x] depends on: #13845 - [x] depends on: #12883 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra t-algebraic-geometry
label:t-algebra$
 543/208 Mathlib.lean,Mathlib/Algebra/Polynomial/Bivariate.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Group.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Universal.lean 6 4 ['Multramate', 'alreadydone', 'github-actions', 'leanprover-community-mathlib4-bot'] nobody
624-70992
1 year ago
unknown
0-0
0 seconds
14036 adomani
author:adomani
 Test/decl diff in lean --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 465/1040 .github/workflows/Lean_decl_diff.yml,.github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build.yml.in,.github/workflows/build_fork.yml,.github/workflows/mk_build_yml.sh,scripts/decls_diff_hybrid.sh,scripts/list_decls.lean 8 1 ['github-actions'] nobody
624-70992
1 year ago
unknown
0-0
0 seconds
14167 alreadydone
author:alreadydone
 feat: Group scheme structure on Weierstrass curve --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebraic-geometry workshop-AIM-AG-2024 727/41 Mathlib.lean,Mathlib/Algebra/GroupWithZero/NonZeroDivisors.lean,Mathlib/Algebra/Polynomial/Bivariate.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Group.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Scheme.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Universal.lean,Mathlib/Data/Finsupp/Basic.lean,Mathlib/GroupTheory/MonoidLocalization.lean,Mathlib/LinearAlgebra/Basis.lean,Mathlib/LinearAlgebra/FreeModule/Basic.lean,Mathlib/RingTheory/AlgebraTower.lean,Mathlib/RingTheory/MvPolynomial/Basic.lean 12 3 ['Multramate', 'github-actions', 'jcommelin'] nobody
624-70992
1 year ago
659-31347
659 days ago
0-12
12 seconds
12952 adomani
author:adomani
 test: length statistics --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP test-ci 124/0 .github/workflows/mathlib_stats.yml,.github/workflows/ml_stats_label.yaml,scripts/mathlib_stats.sh 3 9 ['github-actions'] nobody
624-70991
1 year ago
unknown
0-0
0 seconds
13297 urkud
author:urkud
 feat(Semicontinuous): add `comp` lemma --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-topology t-order 31/13 Mathlib/Topology/Semicontinuous.lean 1 3 ['sgouezel', 'urkud'] nobody
624-70991
1 year ago
688-71689
688 days ago
0-18201
5 hours
13372 adomani
author:adomani
 dev: generic replacement --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 446/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/ReplaceRefine.lean,Mathlib/Tactic/Replacements.lean 4 4 ['adomani', 'github-actions'] nobody
624-70991
1 year ago
unknown
0-0
0 seconds
13512 adomani
author:adomani
 test: count all --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 85/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter.lean,Mathlib/Tactic/Linter/Tally.lean 4 0 [] nobody
624-70991
1 year ago
unknown
0-0
0 seconds
12416 adomani
author:adomani
 chore: remove some cdots --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 3830/3239 Archive/Imo/Imo1972Q5.lean,Archive/Imo/Imo2006Q5.lean,Archive/Imo/Imo2008Q2.lean,Archive/Imo/Imo2021Q1.lean,Archive/Wiedijk100Theorems/AbelRuffini.lean,Archive/Wiedijk100Theorems/BallotProblem.lean,Archive/Wiedijk100Theorems/BirthdayProblem.lean,Archive/Wiedijk100Theorems/BuffonsNeedle.lean,Archive/Wiedijk100Theorems/CubingACube.lean,Archive/Wiedijk100Theorems/FriendshipGraphs.lean,Archive/Wiedijk100Theorems/Partition.lean,Counterexamples/Cyclotomic105.lean,Counterexamples/DirectSumIsInternal.lean,Mathlib.lean,Mathlib/Algebra/Algebra/Spectrum.lean,Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/BigOperators/List/Basic.lean,Mathlib/Algebra/Category/GroupCat/Colimits.lean,Mathlib/Algebra/Category/ModuleCat/Images.lean,Mathlib/Algebra/Category/Ring/Constructions.lean,Mathlib/Algebra/CharP/Quotient.lean,Mathlib/Algebra/ContinuedFractions/Computation/Approximations.lean,Mathlib/Algebra/DirectLimit.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/GCDMonoid/Finset.lean,Mathlib/Algebra/GeomSum.lean,Mathlib/Algebra/Group/UniqueProds.lean,Mathlib/Algebra/GroupPower/Order.lean,Mathlib/Algebra/GroupWithZero/WithZero.lean,Mathlib/Algebra/Homology/Exact.lean,Mathlib/Algebra/Homology/HomotopyCategory/HomComplex.lean,Mathlib/Algebra/Homology/HomotopyCategory/Triangulated.lean,Mathlib/Algebra/Homology/LocalCohomology.lean,Mathlib/Algebra/Homology/TotalComplex.lean,Mathlib/Algebra/Lie/DirectSum.lean,Mathlib/Algebra/Lie/IdealOperations.lean,Mathlib/Algebra/Lie/Nilpotent.lean,Mathlib/Algebra/Lie/Weights/Basic.lean,Mathlib/Algebra/Module/DedekindDomain.lean,Mathlib/Algebra/Module/LinearMap/End.lean,Mathlib/Algebra/Module/LocalizedModule.lean,Mathlib/Algebra/Module/PID.lean,Mathlib/Algebra/Module/Submodule/Bilinear.lean,Mathlib/Algebra/Module/Torsion.lean,Mathlib/Algebra/Module/Zlattice/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Degree.lean,Mathlib/Algebra/MonoidAlgebra/Ideal.lean,Mathlib/Algebra/MvPolynomial/Variables.lean,Mathlib/Algebra/Order/Archimedean.lean,Mathlib/Algebra/Order/BigOperators/Group/List.lean,Mathlib/Algebra/Order/CauSeq/BigOperators.lean,Mathlib/Algebra/Order/CompleteField.lean,Mathlib/Algebra/Order/Field/Basic.lean,Mathlib/Algebra/Order/Group/Abs.lean,Mathlib/Algebra/Order/Group/Int.lean,Mathlib/Algebra/Order/Group/MinMax.lean,Mathlib/Algebra/Order/Interval/Basic.lean,Mathlib/Algebra/Order/Pointwise.lean,Mathlib/Algebra/Order/Sub/Defs.lean,Mathlib/Algebra/Polynomial/BigOperators.lean,Mathlib/Algebra/Polynomial/Degree/Definitions.lean,Mathlib/Algebra/Polynomial/Derivative.lean,Mathlib/Algebra/Polynomial/Div.lean,Mathlib/Algebra/Polynomial/FieldDivision.lean,Mathlib/Algebra/Polynomial/Module/Basic.lean,Mathlib/Algebra/Polynomial/PartialFractions.lean,Mathlib/Algebra/Polynomial/Reverse.lean,Mathlib/Algebra/Polynomial/RingDivision.lean,Mathlib/Algebra/Polynomial/UnitTrinomial.lean,Mathlib/Algebra/Quandle.lean,Mathlib/Algebra/Quaternion.lean,Mathlib/AlgebraicGeometry/AffineScheme.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine.lean,Mathlib/AlgebraicGeometry/FunctionField.lean,Mathlib/AlgebraicGeometry/Gluing.lean,Mathlib/AlgebraicGeometry/Morphisms/Basic.lean,Mathlib/AlgebraicGeometry/Morphisms/QuasiCompact.lean,Mathlib/AlgebraicGeometry/Morphisms/QuasiSeparated.lean,Mathlib/AlgebraicGeometry/Morphisms/RingHomProperties.lean,Mathlib/AlgebraicGeometry/OpenImmersion.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Scheme.lean,Mathlib/AlgebraicGeometry/Properties.lean,Mathlib/AlgebraicGeometry/Pullbacks.lean,Mathlib/AlgebraicGeometry/StructureSheaf.lean,Mathlib/AlgebraicTopology/SimplexCategory.lean,Mathlib/AlgebraicTopology/SplitSimplicialObject.lean,Mathlib/Analysis/Analytic/Composition.lean,Mathlib/Analysis/Analytic/IsolatedZeros.lean,Mathlib/Analysis/BoundedVariation.lean,Mathlib/Analysis/BoxIntegral/Box/Basic.lean,Mathlib/Analysis/BoxIntegral/Partition/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/Deriv/Slope.lean,Mathlib/Analysis/Calculus/FDeriv/Basic.lean,Mathlib/Analysis/Calculus/FDeriv/Extend.lean,Mathlib/Analysis/Calculus/InverseFunctionTheorem/ApproximatesLinearOn.lean,Mathlib/Analysis/Calculus/LocalExtr/Basic.lean,Mathlib/Analysis/Calculus/ParametricIntegral.lean,Mathlib/Analysis/Calculus/TangentCone.lean 608 0 [] nobody
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12465 rosborn
author:rosborn
 style: Change Subtype.val to (↑) --- This is a test to see replacing `Subtype.val` with `(↑)` where appropriate. After performing the rewrite, some of the types subtly changed in a difficult to detect manner. Before the change, `openEmbedding' _` had type `OpenEmbedding Subtype.val` where `Subtype.val` expanded as `@Subtype.val α fun x ↦ x ∈ U : ↥U → α`. After the change, `Subtype.val` expands to `@Subtype.val α fun x ↦ x ∈ ↑U : { x // x ∈ ↑U } → α`. This caused some later proofs to fail due to the different definition. In a similar case, within the proof of `mfderiv_coe_sphere_injective` on line 553 `Subtype.val` expanded as `@Subtype.val E fun x ↦ x ∈ (Submodule.span ℝ {↑(-v)})ᗮ : ↥(Submodule.span ℝ {↑(-v)})ᗮ → E`. After changing to `(↑)`, it expanded to `@Subtype.val E fun x ↦ x ∈ ↑(Submodule.span ℝ {↑(-v)})ᗮ : { x // x ∈ ↑(Submodule.span ℝ {↑(-v)})ᗮ } → E`. One benefit to using `(↑)` was that it lead to a shorter proof as `ContinuousLinearEquiv.coe_coe` could be removed on line 559. In general, this subtle change in types is basically impossible to detect without a tool like leaff. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 50/50 Mathlib/Analysis/InnerProductSpace/Basic.lean,Mathlib/Analysis/Normed/Group/Hom.lean,Mathlib/CategoryTheory/Generator.lean,Mathlib/CategoryTheory/Limits/Shapes/Types.lean,Mathlib/CategoryTheory/Subobject/Types.lean,Mathlib/Data/Fin/Basic.lean,Mathlib/Data/Set/Function.lean,Mathlib/Data/Set/Image.lean,Mathlib/Data/Setoid/Basic.lean,Mathlib/Geometry/Manifold/ContMDiff/Basic.lean,Mathlib/Geometry/Manifold/Instances/Sphere.lean,Mathlib/Geometry/Manifold/LocalInvariantProperties.lean,Mathlib/GroupTheory/Subsemigroup/Operations.lean,Mathlib/LinearAlgebra/LinearIndependent.lean,Mathlib/Order/Directed.lean,Mathlib/Order/RelIso/Basic.lean,Mathlib/Order/RelIso/Set.lean,Mathlib/RingTheory/Artinian.lean,Mathlib/SetTheory/Cardinal/Cofinality.lean,Mathlib/SetTheory/Game/Basic.lean,Mathlib/SetTheory/Game/PGame.lean,Mathlib/SetTheory/Surreal/Basic.lean,Mathlib/Topology/Bornology/Constructions.lean,Mathlib/Topology/EMetricSpace/Lipschitz.lean,Mathlib/Topology/Germ.lean,Mathlib/Topology/UniformSpace/Basic.lean,Mathlib/Topology/UniformSpace/UniformConvergenceTopology.lean,Mathlib/Topology/UniformSpace/UniformEmbedding.lean 28 1 ['eric-wieser', 'rosborn'] nobody
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12473 adomani
author:adomani
 first translations --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 424/265 Mathlib.lean,Mathlib/Order/Lattice.lean,Mathlib/Order/WithBot.lean,Mathlib/Tactic.lean,Mathlib/Tactic/MinMax.lean 5 0 [] nobody
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1 year ago
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12528 adomani
author:adomani
 test: autotranslations Bot --> Top --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 350/294 Mathlib.lean,Mathlib/Order/WithBot.lean,Mathlib/Tactic.lean,Mathlib/Tactic/MinMax.lean,test/MinMax.lean 5 0 [] nobody
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1 year ago
717-20028
717 days ago
0-4
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12588 adomani
author:adomani
 remove trailingDegree --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 1280/979 Mathlib.lean,Mathlib/Algebra/MonoidAlgebra/Basic.lean,Mathlib/Algebra/Polynomial/Degree/Definitions.lean,Mathlib/Algebra/Polynomial/Degree/TrailingDegree.lean,Mathlib/Algebra/Polynomial/Div.lean,Mathlib/Algebra/Polynomial/Mirror.lean,Mathlib/Order/WithBot.lean,Mathlib/Tactic.lean,Mathlib/Tactic/MinMax.lean,Mathlib/Tactic/MinMaxTwo.lean,test/MinMax.lean 11 0 [] nobody
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1 year ago
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12608 eric-wieser
author:eric-wieser
 feat: allow `nsmul` / `zsmul` to be omitted again, with a warning --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra t-meta
label:t-algebra$
 118/2 Mathlib.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Tactic.lean,Mathlib/Tactic/DefaultFieldLinter.lean,scripts/noshake.json,test/default_field_linter.lean 6 12 ['YaelDillies', 'eric-wieser', 'fpvandoorn', 'github-actions'] nobody
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1 year ago
698-30977
698 days ago
5-74504
5 days
12637 adomani
author:adomani
 translation: MonoidAlgebra to AddMonoidAlgebra [Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/merge.20Add-MonoidAlgebra) * #12646 was found as a consequence of unification. * #12659 the typo `single 1 1` for `single 0 1`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra t-meta
label:t-algebra$
 615/986 Mathlib.lean,Mathlib/Algebra/MonoidAlgebra/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Division.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Tactic.lean,Mathlib/Tactic/MinMaxTwo.lean,scripts/noshake.json 7 0 [] nobody
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12679 MichaelStollBayreuth
author:MichaelStollBayreuth
 perf(NumberTheory/RamificationInertia): speed up slow file A repetition of the earlier experiment at [#12412](https://github.com/leanprover-community/mathlib4/pull/12412) with Lean 4.8.0-rc1. This time, I tried not to introduce local instances if possible, but instead to tweak instance priorities. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 57/14 Mathlib/NumberTheory/RamificationInertia.lean 1 3 ['MichaelStollBayreuth', 'github-actions', 'leanprover-bot'] nobody
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12984 adomani
author:adomani
 Adomani/periodic reports dev custom action --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP test-ci 366/0 .github/workflows/mathlib_stats.yml,.github/workflows/ml_stats_label.yaml,scripts/count_decls.lean,scripts/mathlib_stats.sh 4 69 ['github-actions'] nobody
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13057 alreadydone
author:alreadydone
 feat(NumberTheory): characterize elliptic divisibility sequences Main results: + Every `normEDS` is an elliptic divisibility sequence (EDS). The key proof is `rel₄_of_anti_oddRec_evenRec`, based on my original argument first published on [MathSE](https://math.stackexchange.com/a/4903422/12932) + Conversely, every EDS is equal to some `normEDS` (assuming that the first two terms are not zero divisors) --- - [ ] depends on: #13155 - [x] depends on: #13153 - [x] depends on: #10843 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra t-number-theory blocked-by-other-PR
label:t-algebra$
 1032/55 Mathlib/Algebra/Ring/NegOnePow.lean,Mathlib/Data/Int/Defs.lean,Mathlib/Data/Int/Parity.lean,Mathlib/GroupTheory/Perm/Sign.lean,Mathlib/NumberTheory/EllipticDivisibilitySequence.lean 5 6 ['Multramate', 'alreadydone', 'kbuzzard', 'leanprover-community-mathlib4-bot'] nobody
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1 year ago
693-9018
693 days ago
0-34672
9 hours
12192 Ruben-VandeVelde
author:Ruben-VandeVelde
 feat: generalize isLittleO_const_id_atTop/atBot From PNT+. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-analysis 10/4 Mathlib/Analysis/Asymptotics/Asymptotics.lean 1 6 ['Ruben-VandeVelde', 'llllvvuu', 'urkud'] nobody
624-70989
1 year ago
729-6685
729 days ago
1-21749
1 day
10024 ADedecker
author:ADedecker
 feat: rename `connectedComponentOfOne` to `identityComponent`, prove that it is normal and open --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology awaiting-CI 58/24 Mathlib/FieldTheory/AbsoluteGaloisGroup.lean,Mathlib/Topology/Algebra/Group/Basic.lean,Mathlib/Topology/Algebra/Group/TopologicalAbelianization.lean,Mathlib/Topology/Algebra/OpenSubgroup.lean,Mathlib/Topology/Connected/Basic.lean 5 0 [] nobody
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811-63112
811 days ago
0-832
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10521 eric-wieser
author:eric-wieser
 chore: generalize `IsBoundedLinearMap` to modules Most of the lemmas don't actually need the normed on the scalars at all. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-analysis 58/42 Mathlib/Analysis/NormedSpace/BoundedLinearMaps.lean 1 3 ['github-actions', 'j-loreaux', 'urkud'] nobody
624-70988
1 year ago
791-39038
791 days ago
1-29105
1 day
10594 lecopivo
author:lecopivo
 feat: `fun_trans` function transformation tactic e.g. for computing derivatives feat: `fun_trans` function transformation tactic e.g. for computing derivatives Function transformation tactic/simproc. For example it can be used for computing derivatives. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-meta 1819/56 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/FunProp/Core.lean,Mathlib/Tactic/FunProp/Decl.lean,Mathlib/Tactic/FunProp/Elab.lean,Mathlib/Tactic/FunProp/FunctionData.lean,Mathlib/Tactic/FunProp/MorExt.lean,Mathlib/Tactic/FunProp/Theorems.lean,Mathlib/Tactic/FunTrans/Attr.lean,Mathlib/Tactic/FunTrans/Core.lean,Mathlib/Tactic/FunTrans/Decl.lean,Mathlib/Tactic/FunTrans/Elab.lean,Mathlib/Tactic/FunTrans/Theorems.lean,Mathlib/Tactic/FunTrans/Types.lean,test/fun_prop2.lean,test/fun_prop_dev.lean,test/fun_trans_dev.lean 17 11 ['github-actions'] nobody
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10721 urkud
author:urkud
 feat(Order/FunLike): define `PointwiseLE` - introduce a mixin class `DFunLike.PointwiseLE`, use it to define `DFunLike.instPartialOrder`; - add a generic `DFunLike.orderEmbeddingCoe` - add `DFunLike.PointwiseLE` instances here and there. With this refactor and #13022, I'm going to generalize lemmas like `MeasureTheory.ae_mono` to `OuterMeasureClass`. --- - [x] depends on: #12983 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-order t-logic 123/50 Mathlib.lean,Mathlib/Algebra/Order/Hom/Ring.lean,Mathlib/Data/DFinsupp/Order.lean,Mathlib/Data/Finsupp/Order.lean,Mathlib/Data/FunLike/Basic.lean,Mathlib/Dynamics/Circle/RotationNumber/TranslationNumber.lean,Mathlib/GroupTheory/Congruence.lean,Mathlib/Order/FunLike.lean,Mathlib/Order/Heyting/Hom.lean,Mathlib/Order/Hom/Basic.lean,Mathlib/Order/Hom/Bounded.lean,Mathlib/Order/Hom/CompleteLattice.lean,Mathlib/Topology/Order/Hom/Basic.lean 13 48 ['YaelDillies', 'dupuisf', 'leanprover-community-mathlib4-bot', 'urkud'] nobody
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1 year ago
674-49390
674 days ago
64-12984
64 days
10842 mcdoll
author:mcdoll
 chore: simplify proofs using new positivity extensions and tests --- - [x] depends on: #10661 - [ ] depends on: #10796 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP blocked-by-other-PR 98/50 Mathlib/Analysis/Convolution.lean,Mathlib/Analysis/SpecialFunctions/Gaussian.lean,Mathlib/MeasureTheory/Covering/Differentiation.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/CondexpL1.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/Real.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/Unique.lean,Mathlib/MeasureTheory/Function/ContinuousMapDense.lean,Mathlib/MeasureTheory/Integral/Bochner.lean,Mathlib/MeasureTheory/Measure/Tilted.lean,Mathlib/Probability/Martingale/Upcrossing.lean,Mathlib/Probability/Moments.lean,Mathlib/Probability/Variance.lean,Mathlib/Tactic/Positivity/Core.lean,test/positivity.lean 14 1 ['leanprover-community-mathlib4-bot'] nobody
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10845 Shamrock-Frost
author:Shamrock-Frost
 Refactor: Make MonoidalFunctor carry the data of an inverse We change the definition of a strong monoidal functor from a lax monoidal functor for which the unitor and tensorator are `IsIso` to a lax monoidal functor with the data of inverses for the unitor and tensorator. This requires fixing a lot of knock on effects. --- This is a **draft PR**. I would like to talk with people on zulip before merging it, and plan ahead to when we have oplax/colax monoidal functors as well. I'm not sure the approach I took here where `MonoidalFunctor` inherits from `LaxMonoidalFunctor` is a good choice if we want to be lax/oplax symmetric. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP RFC t-category-theory 3799/1589 Mathlib/Algebra/Category/ModuleCat/Adjunctions.lean,Mathlib/Algebra/Homology/HomotopyCategory/DegreewiseSplit.lean,Mathlib/CategoryTheory/Adjunction/Basic.lean,Mathlib/CategoryTheory/Adjunction/Mates.lean,Mathlib/CategoryTheory/Adjunction/Opposites.lean,Mathlib/CategoryTheory/Adjunction/Prod.lean,Mathlib/CategoryTheory/Adjunction/Whiskering.lean,Mathlib/CategoryTheory/Bicategory/End.lean,Mathlib/CategoryTheory/Bicategory/SingleObj.lean,Mathlib/CategoryTheory/CatCommSq.lean,Mathlib/CategoryTheory/CatSquares.lean,Mathlib/CategoryTheory/Enriched/Basic.lean,Mathlib/CategoryTheory/Equivalence.lean,Mathlib/CategoryTheory/Iso.lean,Mathlib/CategoryTheory/Monoidal/Adjunction.lean,Mathlib/CategoryTheory/Monoidal/Braided.lean,Mathlib/CategoryTheory/Monoidal/Category.lean,Mathlib/CategoryTheory/Monoidal/Center.lean,Mathlib/CategoryTheory/Monoidal/CommMon_.lean,Mathlib/CategoryTheory/Monoidal/Discrete.lean,Mathlib/CategoryTheory/Monoidal/End.lean,Mathlib/CategoryTheory/Monoidal/Free/Basic.lean,Mathlib/CategoryTheory/Monoidal/Functor.lean,Mathlib/CategoryTheory/Monoidal/Limits.lean,Mathlib/CategoryTheory/Monoidal/Mon_.lean,Mathlib/CategoryTheory/Monoidal/NaturalTransformation.lean,Mathlib/CategoryTheory/Monoidal/Opposite.lean,Mathlib/CategoryTheory/Monoidal/Rigid/FunctorCategory.lean,Mathlib/CategoryTheory/Monoidal/Rigid/OfEquivalence.lean,Mathlib/CategoryTheory/Monoidal/Subcategory.lean,Mathlib/CategoryTheory/Monoidal/Transport.lean,Mathlib/CategoryTheory/Monoidal/Types/Basic.lean,Mathlib/CategoryTheory/Opposites.lean,Mathlib/CategoryTheory/Products/Associator.lean,Mathlib/CategoryTheory/Products/Basic.lean,Mathlib/CategoryTheory/Shift/Basic.lean,Mathlib/CategoryTheory/Shift/Pullback.lean,Mathlib/CategoryTheory/Whiskering.lean,Mathlib/RepresentationTheory/Action/Monoidal.lean,Mathlib/RepresentationTheory/GroupCohomology/Resolution.lean,Mathlib/RepresentationTheory/Rep.lean 41 7 ['Shamrock-Frost', 'joelriou'] nobody
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11100 eric-wieser
author:eric-wieser
 feat(CategoryTheory/Limits): add `Functor.mapBinaryBiconeInv` --- - [ ] depends on: #11130 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) It's tempting to try to prove something like ```lean theorem Functor.mapBinaryBiconeInv_toCone [Limits.HasZeroMorphisms C] [Limits.HasZeroMorphisms D] (e : D ⥤ C) [IsEquivalence e] {X Y : D} (b : BinaryBicone (e.obj X) (e.obj Y)) : (e.mapBinaryBiconeInv b).toCone = (e.mapConeInv <| (Cones.postcompose (pairComp X Y e).symm.hom).obj b.toCone) := by simp sorry theorem Functor.mapBinaryBiconeInv_toCocone [Limits.HasZeroMorphisms C] [Limits.HasZeroMorphisms D] (e : D ⥤ C) [IsEquivalence e] {X Y : D} (b : BinaryBicone (e.obj X) (e.obj Y)) : (e.mapBinaryBiconeInv b).toCocone = (e.mapCoconeInv <| (Cocones.precompose (pairComp X Y e).hom).obj b.toCocone) := by sorry ``` but maybe equality is evil here merge-conflict t-category-theory awaiting-CI 52/0 Mathlib/CategoryTheory/Adjunction/Basic.lean,Mathlib/CategoryTheory/Equivalence.lean,Mathlib/CategoryTheory/Limits/Preserves/Shapes/Biproducts.lean 3 6 ['TwoFX', 'eric-wieser', 'leanprover-community-mathlib4-bot'] nobody
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1 year ago
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8503 thorimur
author:thorimur
 feat: meta utils for `refine?` This PR introduces some metaprogramming infrastructure and utilities that are necessary for `refine?` (#8364). * `elabTermWithHoles'` (and `withCollectingNewGoalsFrom'`): a more configurable version of `elabTermWithHoles`, which allows: preserving the initial mvar type; *not* tagging untagged goals; and postponing mvars. * Some `Syntax` and `TSyntax` functionality, including: * `TSyntax.map`(`M`), for acting on `TSyntax` with functions `f : Syntax -> (m) Syntax` * Range operations: `includes` and `isEqByRange` * `setTrailingInfoBy?` and `unsetOriginalTrailing`, which is like `unsetTrailing`, but behaves as expected. * `Term.withoutModifyingState`, which does not allow unknown mvarIds to escape via the infotree * `hasNewErrors`, which runs a monad computation and returns the value along with `true` or `false` depending on whether new error messages have been logged * the option `pp.anonymousMVarSuffixes`, which can be set to `false` to replace all numeric suffixes of anonymous mvars with `✝`, which is useful in tandem with `#guard_msgs` for tests (but is essentially a workaround—although it can make some tactic states more legible). --- I'm open to suggestions on the location and name of the option/delaborator used for trimming the numeric suffixes of anonymous mvar names (which is used in the tests)—including whether or not it should exist in the first place, as it's essentially just a workaround. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-meta 312/5 Mathlib.lean,Mathlib/Lean/CoreM.lean,Mathlib/Lean/Elab/Tactic/ElabTerm.lean,Mathlib/Lean/Elab/Term.lean,Mathlib/Util/Delaborators.lean,Mathlib/Util/Syntax.lean 6 2 ['kmill', 'thorimur'] kmill
assignee:kmill
624-70987
1 year ago
841-43311
841 days ago
38-46649
38 days
8519 eric-wieser
author:eric-wieser
 refactor(LinearAlgebra/TensorProduct): golf using `liftAddHom` This new `TensorProduct.liftAddHom` doesn't require bilinearity, only that scalar multiplication can be moved between the arguments. While in theory we only need the `AddMonoidHom` version as it offers exactly the same generality, we first provide an unbundled `liftFun` as this seems to give a sizeable performance boost if used in downstream `lift` variants. --- - [x] depends on: #8571 - [x] depends on: #8584 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 53/50 Mathlib/Algebra/Category/AlgebraCat/Monoidal.lean,Mathlib/LinearAlgebra/TensorProduct.lean,Mathlib/LinearAlgebra/TensorProduct/Tower.lean 3 28 ['bustercopley', 'eric-wieser', 'jcommelin', 'jjaassoonn', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'mathlib-bors'] nobody
624-70987
1 year ago
864-36350
864 days ago
5-6524
5 days
8582 eric-wieser
author:eric-wieser
 wip --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 3/7 Mathlib/Algebra/Category/AlgebraCat/Monoidal.lean,Mathlib/LinearAlgebra/TensorProduct.lean 2 4 ['eric-wieser', 'leanprover-bot'] nobody
624-70987
1 year ago
unknown
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8616 eric-wieser
author:eric-wieser
 feat(Algebra/FreeAlgebra): add right action and `IsCentralScalar` --- - [ ] depends on: #8652 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra awaiting-CI
label:t-algebra$
 30/8 Mathlib/Algebra/FreeAlgebra.lean 1 1 ['leanprover-community-mathlib4-bot'] nobody
624-70987
1 year ago
872-18529
872 days ago
2-25170
2 days
8658 eric-wieser
author:eric-wieser
 feat: support right actions for `Con` This adds a new `Con.CompatibleSMul` typeclass that captures exactly the condition when `smul` descends to the quotient. I was not quite able to merge this with `MulAction.QuotientAction`: * The imports are such that the congruence relation `QuotientGroup.con` is not yet available in that file * `QuotientGroup.con` requires the subgroup to be normal, while `MulAction.QuotientAction` does not --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 80/18 Mathlib/GroupTheory/Congruence.lean,Mathlib/RingTheory/Congruence.lean 2 6 ['YaelDillies', 'eric-wieser'] nobody
624-70987
1 year ago
841-36634
841 days ago
29-65537
29 days
8788 FMLJohn
author:FMLJohn
 feat(Algebra/Module/GradeZeroModule): if `A` is a graded semiring and `M` is a graded `A`-module, then each grade of `M` is a module over the 0-th grade of `A`. --- - [ ] depends on: #8187 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 237/4 Mathlib.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/GradedMonoid.lean,Mathlib/Algebra/Module/GradeZeroModule.lean,Mathlib/RingTheory/GradedAlgebra/Basic.lean,Mathlib/RingTheory/GradedAlgebra/Noetherian.lean 6 4 ['FMLJohn', 'github-actions', 'leanprover-community-mathlib4-bot'] nobody
624-70987
1 year ago
864-60883
864 days ago
1-57831
1 day
8906 jjaassoonn
author:jjaassoonn
 feat: add some missing lemmas about linear algebra --- - [ ] depends on: #8905 [lifting injective modules to higher universe] [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 45/1 Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Module/Injective.lean,Mathlib/LinearAlgebra/Basic.lean,Mathlib/LinearAlgebra/BilinearMap.lean 4 21 ['AntoineChambert-Loir', 'alreadydone', 'jjaassoonn', 'leanprover-community-mathlib4-bot'] nobody
624-70987
1 year ago
860-44081
860 days ago
0-343
5 minutes
8961 eric-wieser
author:eric-wieser
 refactor: use the coinduced topology on ULift --- - [x] depends on: #8958 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt merge-conflict awaiting-author awaiting-CI 46/14 Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Topology/Bornology/Constructions.lean,Mathlib/Topology/Constructions.lean 3 6 ['eric-wieser', 'github-actions', 'leanprover-community-mathlib4-bot', 'urkud'] nobody
624-70987
1 year ago
858-16417
858 days ago
0-1
1 second
9146 laughinggas
author:laughinggas
 feat(Data/ZMod/Defs): Topological structure on `ZMod` Added a discrete topology structure to `ZMod n` for all `n` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra awaiting-author t-topology
label:t-algebra$
 55/3 Mathlib.lean,Mathlib/Topology/Algebra/Constructions.lean,Mathlib/Topology/Algebra/Group/Basic.lean,Mathlib/Topology/Instances/ZMod.lean,Mathlib/Topology/Maps.lean 5 61 ['YaelDillies', 'eric-wieser', 'github-actions', 'jcommelin', 'laughinggas', 'mo271', 'urkud'] nobody
624-70987
1 year ago
831-29078
831 days ago
7-11053
7 days
9229 eric-wieser
author:eric-wieser
 refactor(Algebra/GradedMonoid): Use `HMul` to define `GMul` This make the notation much nicer, but I'm pretty sure this is a bad idea for performance / ambiguity reasons. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra
label:t-algebra$
 114/125 Mathlib/Algebra/DirectSum/Algebra.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/DirectSum/Ring.lean,Mathlib/Algebra/GradedMonoid.lean,Mathlib/Algebra/GradedMulAction.lean,Mathlib/Algebra/Module/GradedModule.lean,Mathlib/Algebra/MonoidAlgebra/ToDirectSum.lean,Mathlib/LinearAlgebra/TensorAlgebra/ToTensorPower.lean,Mathlib/LinearAlgebra/TensorPower.lean,Mathlib/LinearAlgebra/TensorProduct/Graded/Internal.lean,Mathlib/RingTheory/GradedAlgebra/Basic.lean 11 6 ['eric-wieser', 'leanprover-bot'] nobody
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1 year ago
unknown
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9252 astrainfinita
author:astrainfinita
 chore: remove redundant covariance instances, add priority I noticed that the following code is surprisingly slow. ``` lean import Mathlib count_heartbeats in example {n : ℕ} : CovariantClass (Fin (n + 1)) (Fin (n + 1)) (· + ·) (· < ·) := by try infer_instance sorry ``` This PR removed some redundant instances. The heartbeats have dropped from 19118 to 11450 (still too slow). Lean4 still seems to make some redundant attempts. See also https://github.com/leanprover-community/mathlib4/issues/6646#issuecomment-1691792488. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra t-order merge-conflict slow-typeclass-synthesis awaiting-author
label:t-algebra$
 40/32 Mathlib/Algebra/CovariantAndContravariant.lean,Mathlib/Algebra/Order/Group/Defs.lean,Mathlib/Algebra/Order/Monoid/Defs.lean,Mathlib/CategoryTheory/Abelian/DiagramLemmas/Four.lean 4 8 ['astrainfinita', 'leanprover-bot', 'urkud'] nobody
624-70987
1 year ago
unknown
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9354 chenyili0818
author:chenyili0818
 feat: monotonicity of gradient on convex real-valued functions This file is based on Mathlib.Analysis.Calculus.Gradient.Basic, and describes the calculation properties co-authored-by: Ziyu Wang [tropicalfish910@gmail.com](mailto:tropicalfish910@gmail.com) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-analysis 540/0 Mathlib.lean,Mathlib/Analysis/Convex/ConvexFunction.lean 2 15 ['github-actions', 'winstonyin'] nobody
624-70987
1 year ago
815-15213
815 days ago
23-36394
23 days
9356 alexjbest
author:alexjbest
 feat: assumption? A little helper for replacing `assumption`s with `exact` statements quickly --- If this is approved I will add tests This begs the question of whether it might simply be better to add some sort of code action for "replace with trythis output" [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-meta 24/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Common.lean,Mathlib/Tactic/TryAssumption.lean 4 5 ['alexjbest', 'j-loreaux', 'jcommelin'] nobody
624-70987
1 year ago
819-20585
819 days ago
19-26336
19 days
9469 dupuisf
author:dupuisf
 feat: maximum modulus principle for functions vanishing at infinity This PR adds versions of the maximum modulus principle for functions vanishing at infinity that parallel those we already had for functions over a bounded set. These will have applications in e.g. norm interpolation. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-analysis 71/0 Mathlib/Analysis/Complex/AbsMax.lean 1 8 ['dupuisf', 'j-loreaux'] nobody
624-70987
1 year ago
819-25833
819 days ago
12-86009
12 days
9482 yuma-mizuno
author:yuma-mizuno
 refactor(CategoryTheory/Monoidal): add `LaxMonoidalStruct` Add a `LaxMonoidalStruct` with only the unit morphism `ε` and the tensorator `μ`. This is used in #6307 to provide two different constructors for `LaxMonoidal` that have common `ε` and `μ` but use the tensor of morphisms or the whiskerings. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-category-theory 21/8 Mathlib/Algebra/Category/ModuleCat/Adjunctions.lean,Mathlib/CategoryTheory/Monoidal/Functorial.lean,Mathlib/CategoryTheory/Monoidal/Limits.lean 3 0 [] nobody
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1 year ago
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9487 eric-wieser
author:eric-wieser
 feat: the exponential of dual numbers over non-commutative rings This is a work in progress, as I don't know my way around the measure theory library. --- - [x] depends on: #9489 - [x] depends on: #9486 - [x] depends on: #10427 - [ ] depends on: #10452 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra t-measure-probability merge-conflict t-analysis
label:t-algebra$
 97/0 Mathlib/Analysis/NormedSpace/TrivSqZeroExt.lean 1 7 ['github-actions', 'leanprover-community-mathlib4-bot'] nobody
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1 year ago
unknown
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9504 alreadydone
author:alreadydone
 chore: remove some IsSeparable assumptions --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra
label:t-algebra$
 41/14 Mathlib/NumberTheory/NumberField/Norm.lean,Mathlib/RingTheory/Norm.lean 2 0 [] nobody
624-70987
1 year ago
unknown
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9510 eric-wieser
author:eric-wieser
 feat(Analysis/Calculus/DualNumber): Extending differentiable functions to dual numbers This shows that this operation preserves multiplication and composition --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra t-analysis awaiting-CI
label:t-algebra$
 119/0 Mathlib/Analysis/Calculus/DualNumber.lean 1 4 ['github-actions'] nobody
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1 year ago
unknown
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9570 eric-wieser
author:eric-wieser
 feat(Algebra/Star): Non-commutative generalization of `StarModule` [Zulip thread](https://leanprover.zulipchat.com/#narrow/stream/116395-maths/topic/Star.20modules.20over.20non-commutative.20scalars/near/383664005). Until we address #7152, we have to have both `StarModule` and `StarModule'`. To prove this generalization is useful, this shows that with it as an assumption, `TrivSqZeroExt` is a `StarRing`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra awaiting-CI
label:t-algebra$
 66/6 Mathlib/Algebra/Star/Basic.lean,Mathlib/Algebra/Star/Pi.lean,Mathlib/Algebra/Star/Prod.lean,Mathlib/Algebra/TrivSqZeroExt.lean 4 0 [] nobody
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1 year ago
unknown
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9642 eric-wieser
author:eric-wieser
 refactor(Analysis/Normed/{Group/Field}/Basic): Let `extends` generate the repeated fields New-style structure shenanigans mean that instance constructors randomly complain about a missing field that can be found with `__ : MetricSpace _ := infer_instance`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) I will write a longer PR description for this once CI is happy WIP merge-conflict awaiting-author help-wanted t-analysis 122/202 Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Complex/Basic.lean,Mathlib/Analysis/Matrix.lean,Mathlib/Analysis/Normed/Field/Basic.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Analysis/Normed/Group/Completion.lean,Mathlib/Analysis/Normed/Order/Basic.lean,Mathlib/Analysis/NormedSpace/ProdLp.lean,Mathlib/Analysis/NormedSpace/Star/Matrix.lean,Mathlib/Analysis/NormedSpace/Unitization.lean,Mathlib/Analysis/Quaternion.lean,Mathlib/Geometry/Manifold/Instances/Sphere.lean,Mathlib/InformationTheory/Hamming.lean,Mathlib/MeasureTheory/Measure/Lebesgue/VolumeOfBalls.lean,Mathlib/NumberTheory/NumberField/CanonicalEmbedding.lean,Mathlib/NumberTheory/Padics/PadicIntegers.lean,Mathlib/Topology/ContinuousFunction/Bounded.lean 17 11 ['eric-wieser', 'leanprover-bot', 'urkud'] nobody
624-70987
1 year ago
unknown
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6580 adomani
author:adomani
 chore: `move_add`-driven replacements This PR accompanies #6576 and uses `move_add/mul` to simplify/streamline a selection of proofs. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author 12/13 Counterexamples/Monic_nonRegular.lean,Mathlib/Algebra/Associated.lean,Mathlib/Data/Polynomial/RingDivision.lean,Mathlib/LinearAlgebra/QuadraticForm/Basic.lean 4 0 [] nobody
624-70986
1 year ago
910-33750
910 days ago
62-34247
62 days
6630 MohanadAhmed
author:MohanadAhmed
 feat: Reduced Spectral Theorem For A hermitian matrix $A : n \times n$ with rank $A.rank \leq n$, we can eliminate the zero eigenvalues and their corresponding eigenvectors from the (alternate) spectral theorem. As such the matrix $A$ can be written as: $$A = V₁ D V₁ᴴ$$ where - $V₁$ : $n \times r$ is the matrix of eigenvector with non-zero associated eigenvalues. - $D$ is $r \times r$ is the diagonal matrix containing only non-zero eigenvalues on its main diagonal. with $r = A.rank$ being the rank of the matrix Towards that goal we make several equivalence definitions: - `{i // hA.eigenvalues i ≠ 0} ≃ Fin (A.rank)` the set of non-zero eigenvalues can be indexed by the numbers from 0 to (r - 1). - `{i // ¬ hA.eigenvalues i ≠ 0} ≃ Fin (n - A.rank)` the set of non-zero eigenvalues can be indexed by the numbers from 0 to (n - r - 1). - `{i // hA.eigenvalues i ≠ 0} ⊕ {i // ¬hA.eigenvalues i ≠ 0} ≃ n`: the index set of the matrix (together with the associated eigenvector matrix and eigenvalues matrix ) can be partitioned into two complement groups the ones corresponding to non-zero eigenvalues and the ones corresponding to zero eigenvalues. - We can then put the previous definitions together to obtain a: `Fin (A.rank) ⊕ Fin (Fintype.card n - A.rank) ≃ n` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra
label:t-algebra$
 31/0 Mathlib/LinearAlgebra/Matrix/Spectrum.lean 1 0 [] nobody
624-70986
1 year ago
unknown
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6791 eric-wieser
author:eric-wieser
 refactor: Use flat structures for morphisms This restores the symmetry we had in Lean3, where we had `MonoidHom.mk f one mul` not `MonoidHom.mk (OneHom.mk f one) mul`, and `f.toFun` wasn't notation for `f.toMulHom.toFun`. The nesting provided by the previous inheritance is useless to us in the face of `MonoidHomClass.toMonoidHom`, which completely eta-expands the structure anyway. We call the class `FunLikeFlatHack._` because this means the field is called `to_` which uses up less space in the goal view than any alternative. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author help-wanted awaiting-CI 174/201 Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Category/GroupCat/ZModuleEquivalence.lean,Mathlib/Algebra/Category/GroupWithZeroCat.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf.lean,Mathlib/Algebra/Category/MonCat/Basic.lean,Mathlib/Algebra/Group/Ext.lean,Mathlib/Algebra/Group/Prod.lean,Mathlib/Algebra/Group/UniqueProds.lean,Mathlib/Algebra/Hom/Equiv/Basic.lean,Mathlib/Algebra/Hom/Group/Defs.lean,Mathlib/Algebra/Hom/GroupAction.lean,Mathlib/Algebra/Hom/NonUnitalAlg.lean,Mathlib/Algebra/Hom/Ring/Defs.lean,Mathlib/Algebra/Lie/Basic.lean,Mathlib/Algebra/Module/Equiv.lean,Mathlib/Algebra/Module/LinearMap.lean,Mathlib/Algebra/Order/Hom/Ring.lean,Mathlib/Algebra/Order/Interval.lean,Mathlib/Algebra/Ring/Equiv.lean,Mathlib/Analysis/Normed/Group/SemiNormedGroupCat.lean,Mathlib/Data/FunLike/Basic.lean,Mathlib/Data/Rat/Cast/CharZero.lean,Mathlib/Data/Real/EReal.lean,Mathlib/Data/Real/Sqrt.lean,Mathlib/GroupTheory/FreeAbelianGroup.lean,Mathlib/GroupTheory/MonoidLocalization.lean,Mathlib/LinearAlgebra/Quotient.lean,Mathlib/LinearAlgebra/TensorProduct.lean,Mathlib/RingTheory/RingInvo.lean,Mathlib/Topology/Algebra/Module/Basic.lean,Mathlib/Topology/MetricSpace/Dilation.lean 32 0 [] nobody
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1 year ago
unknown
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6930 kmill
author:kmill
 feat: `resynth_instances` tactic for resynthesizing instances in the goal or local context This tactic can be useful for debugging non-canonical instances or for fixing up goals and hypotheses after using the `classical` tactic. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-meta 327/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/ResynthInstances.lean,test/ResynthInstances.lean 4 0 [] nobody
624-70986
1 year ago
unknown
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6931 urkud
author:urkud
 refactor(Analysis/Normed*): use `RingHomIsometric` for `*.norm_cast` --- I don't understand why linter fails. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict help-wanted t-analysis 78/68 Mathlib/Analysis/LocallyConvex/ContinuousOfBounded.lean,Mathlib/Analysis/Normed/Field/Basic.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Analysis/NormedSpace/Basic.lean,Mathlib/Analysis/NormedSpace/Exponential.lean,Mathlib/Analysis/NormedSpace/Spectrum.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/NumberTheory/NumberField/Embeddings.lean 8 0 [] nobody
624-70986
1 year ago
unknown
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7225 jjaassoonn
author:jjaassoonn
 some random stuff - Consider two commutative rings `R` and `S` and `X` and `(R, S)`-bimodule. Consider the tensor functor `(X ⊗[R] .)` from the category of `R`-modules to the category of `S`-modules and the hom functor `X →ₗ[S] .` from the category of `S`-modules to the category of `R`-modules, they form an adjunction. - direct limits of modules commute with tensor product - A proof of ![00HD](https://stacks.math.columbia.edu/tag/00HD) Three definitions for flatness: 1. in terms of injectiveness ```lean def Flat.injective : Prop := ∀ ⦃N N' : ModuleCat.{u} R⦄ (L : N ⟶ N'), Function.Injective L → Function.Injective ((tensorRight (ModuleCat.of R M)).map L) ``` 2. in terms of ideals ```lean def Flat.ideal : Prop := ∀ (I : Ideal R), Function.Injective (TensorProduct.lift ((lsmul R M).comp I.subtype)) ``` 3. in terms of finitely generated ideal ```lean def Flat.fg_ideal : Prop := ∀ ⦃I : Ideal R⦄ (_ : I.FG), Function.Injective (TensorProduct.lift ((lsmul R M).comp I.subtype)) ``` and they are all equivalent: ```lean lemma tfae : List.TFAE [ Flat.injective R M, Flat.ideal R M, Flat.fg_ideal R M ] := by ``` The dependencies between these changed files are: ``` Algebra.Module.LinearMap--------------------------------- | | | | v v Algebra.Category.ModuleCat.TensorProduct -----> Algebra.Character | | | v Algebra.DirectLimitAndTensorProduct -------------> RingTheory.Flat ``` to prove equivalence of other definitions, e.g. exact functor, tor, etc should be easier with this because the proof is will be categorical --- ------------- Some other stuff not about flatness 1. If $S$ is a submonoid and $I$ is maximally disjoint from $S$ then $I$ is prime 2. if $\mathfrak p$ is a minimal prime, then $x \in \mathfrak p$ implies that $x$ is a zero divisor 3. Noetherian rings has only finitely many minimal ideals 4. One version of [the prime avoidance lemma](https://en.wikipedia.org/wiki/Prime_avoidance_lemma): if $E$ is an addsubgroup of a ring and is mutiplicatively closed, and $\mathfrak p_i$ is some prime ideals, then not being any subset of the individual prime ideal implies that not being a subset of their union ---------- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 1828/16 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/TensorProduct.lean,Mathlib/Algebra/Character.lean,Mathlib/Algebra/DirectLimitAndTensorProduct.lean,Mathlib/Algebra/Module/LinearMap.lean,Mathlib/AlgebraicGeometry/PrimeSpectrum/Basic.lean,Mathlib/AlgebraicGeometry/PrimeSpectrum/Noetherian.lean,Mathlib/CategoryTheory/Functor/Fin.lean,Mathlib/CategoryTheory/ShortExactSequence.lean,Mathlib/RingTheory/Flat.lean,Mathlib/RingTheory/Ideal/Basic.lean,Mathlib/RingTheory/Ideal/MinimalPrime.lean,Mathlib/RingTheory/Ideal/PrimeAvoidance.lean 13 6 ['eric-wieser', 'jjaassoonn'] nobody
624-70986
1 year ago
unknown
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7227 kmill
author:kmill
 feat: flexible binders and integration into notation3 Introduces `flexibleBinders`, which is an extensible system for binder notations that allow destructuring, bounded domains, and other niceties. Integrates this into `notation3`, and makes `Finset.sum`/`Finset.prod` use it. --- - [ ] depends on: #6833 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-meta 1215/131 Mathlib.lean,Mathlib/Algebra/BigOperators/Basic.lean,Mathlib/Algebra/BigOperators/Intervals.lean,Mathlib/Algebra/BigOperators/NatAntidiagonal.lean,Mathlib/Mathport/Notation.lean,Mathlib/Util/FlexibleBinders.lean,Mathlib/Util/FlexibleBindersFinset.lean,Mathlib/Util/SyntaxFun.lean,test/FlexibleBinders.lean,test/notation3.lean 10 3 ['eric-wieser', 'kmill', 'leanprover-community-mathlib4-bot'] nobody
624-70986
1 year ago
unknown
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7351 shuxuezhuyi
author:shuxuezhuyi
 feat(Topology/Algebra/Order): extend function on `Ioo` to `Icc` Extend a strictly monotone function defined on an open interval. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-order 59/0 Mathlib.lean,Mathlib/Data/Set/Function.lean,Mathlib/Topology/Algebra/Order/IccExtendFromIoo.lean 3 7 ['j-loreaux', 'shuxuezhuyi'] nobody
624-70986
1 year ago
903-39814
903 days ago
30-32706
30 days
7467 ADedecker
author:ADedecker
 feat: spectrum of X →ᵇ ℂ is StoneCech X --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-analysis 121/23 Mathlib/Analysis/NormedSpace/Star/BoundedContinuousFunction.lean,Mathlib/Analysis/NormedSpace/Star/GelfandDuality.lean,Mathlib/Topology/ContinuousFunction/Bounded.lean,Mathlib/Topology/ContinuousFunction/Compact.lean 4 1 ['github-actions'] nobody
624-70986
1 year ago
unknown
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7512 Komyyy
author:Komyyy
 perf: override the data structures of coinductive types The data structures of the model of coinductive types (`Stream'`, `Computation`, `Stream'.Seq`) are inefficient, so we override their data structures. --- - [x] depends on: #7514 - [ ] depends on: leanprover/lean4#2292 - [x] depends on: leanprover/std4#371 - [x] depends on: #8460 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP blocked-by-core-PR blocked-by-other-PR merge-conflict t-meta 6919/3700 Mathlib.lean,Mathlib/Algebra/ContinuedFractions/Basic.lean,Mathlib/Algebra/ContinuedFractions/Computation/ApproximationCorollaries.lean,Mathlib/Algebra/ContinuedFractions/Computation/Approximations.lean,Mathlib/Algebra/ContinuedFractions/Computation/Basic.lean,Mathlib/Algebra/ContinuedFractions/Computation/CorrectnessTerminating.lean,Mathlib/Algebra/ContinuedFractions/Computation/TerminatesIffRat.lean,Mathlib/Algebra/ContinuedFractions/Computation/Translations.lean,Mathlib/Algebra/ContinuedFractions/ContinuantRecurrence.lean,Mathlib/Algebra/ContinuedFractions/EvalEquiv.lean,Mathlib/Algebra/ContinuedFractions/Real.lean,Mathlib/Algebra/ContinuedFractions/TerminatedStable.lean,Mathlib/Algebra/ContinuedFractions/Translations.lean,Mathlib/Combinatorics/Hindman.lean,Mathlib/Control/Fix.lean,Mathlib/Control/LawfulFix.lean,Mathlib/Data/Seq/Computation.lean,Mathlib/Data/Seq/Parallel.lean,Mathlib/Data/Seq/Seq.lean,Mathlib/Data/Seq/WSeq.lean,Mathlib/Data/Stream.lean,lean-toolchain 22 2 ['digama0', 'leanprover-community-mathlib4-bot'] nobody
624-70986
1 year ago
unknown
0-0
0 seconds
7564 shuxuezhuyi
author:shuxuezhuyi
 feat(Topology/Algebra/Order): extend strictly monotone function on `Ioo` to homeomorphism on `Icc` A strictly monotone function between open intervals can be extended to a homeomorphism between the closed intervals. --- - [ ] depends on: #7351 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology blocked-by-other-PR 162/0 Mathlib.lean,Mathlib/Topology/Algebra/Order/IccExtendFromIoo.lean 2 1 ['leanprover-community-mathlib4-bot'] nobody
624-70986
1 year ago
922-58218
922 days ago
0-537
8 minutes
7601 digama0
author:digama0
 feat: ring hom support in `ring` As [requested on Zulip](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/aroots/near/395750055). Adds support for distributing ring morphisms in `ring`: ```lean example (p : ℤ[X]) (r : ℤ) : C (2 * r) * p = C r * p + C r * p := by ring ``` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra t-meta
label:t-algebra$
 257/48 Mathlib/Tactic/Ring/Basic.lean,test/linear_combination.lean,test/ring.lean 3 1 ['eric-wieser'] nobody
624-70986
1 year ago
857-54589
857 days ago
62-28836
62 days
7615 eric-wieser
author:eric-wieser
 chore(LinearAlgebra/Basic): generalize compatibleMaps to semilinear maps Spotted while reviewing #7611 --- - [x] depends on: #7611 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra easy awaiting-CI
label:t-algebra$
 9/33 Mathlib/LinearAlgebra/Basic.lean 1 1 ['leanprover-community-mathlib4-bot'] nobody
624-70986
1 year ago
919-19294
919 days ago
0-1
1 second
7713 RemyDegenne
author:RemyDegenne
 feat: add_left/right_inj for measures `μ + ν₁ = μ + ν₂ ↔ ν₁ = ν₂`, and similarly on the right. This is not true in general for measures, but is true when `μ` is mutually singular with the two other measures or when `μ` is finite. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-measure-probability 53/1 Mathlib/MeasureTheory/Measure/MutuallySingular.lean,lean-toolchain 2 6 ['RemyDegenne', 'digama0', 'eric-wieser', 'fpvandoorn'] nobody
624-70986
1 year ago
912-65124
912 days ago
0-62955
17 hours
7835 shuxuezhuyi
author:shuxuezhuyi
 feat(LinearAlgebra/Matrix): `lift` for projective special linear group We provide converters to help with the use of "quotient.liftOn" on projective special linear groups. --- - [x] depends on: #7826 - [x] depends on: #7791 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 52/0 Mathlib/LinearAlgebra/Matrix/ProjectiveSpecialLinearGroup.lean 1 3 ['jcommelin', 'leanprover-community-mathlib4-bot', 'shuxuezhuyi'] jcommelin
assignee:jcommelin
624-70986
1 year ago
770-80817
770 days ago
1-85797
1 day
7875 astrainfinita
author:astrainfinita
 chore: make `SMulCommClass A A B` and `SMulCommClass A B B` higher priority --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict slow-typeclass-synthesis t-algebra
label:t-algebra$
 54/48 Mathlib/Algebra/Algebra/Basic.lean,Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/DirectSum/Algebra.lean,Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/Group/Subgroup/Actions.lean,Mathlib/Algebra/Lie/NonUnitalNonAssocAlgebra.lean,Mathlib/Algebra/Module/LinearMap/End.lean,Mathlib/Algebra/MonoidAlgebra/Basic.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/Ring/CentroidHom.lean,Mathlib/Algebra/Ring/Subring/Basic.lean,Mathlib/Algebra/Ring/Subsemiring/Basic.lean,Mathlib/Algebra/Star/NonUnitalSubalgebra.lean,Mathlib/Analysis/Complex/UnitDisc/Basic.lean,Mathlib/Analysis/NormedSpace/lpSpace.lean,Mathlib/Data/Matrix/Basic.lean,Mathlib/GroupTheory/GroupAction/Prod.lean,Mathlib/GroupTheory/GroupAction/Ring.lean,Mathlib/GroupTheory/GroupAction/SubMulAction.lean,Mathlib/GroupTheory/MonoidLocalization.lean,Mathlib/GroupTheory/Submonoid/Center.lean,Mathlib/LinearAlgebra/PiTensorProduct.lean,Mathlib/RingTheory/Ideal/Quotient.lean,Mathlib/RingTheory/TensorProduct/Basic.lean,Mathlib/Topology/ContinuousFunction/ContinuousMapZero.lean,Mathlib/Topology/ContinuousFunction/StoneWeierstrass.lean,Mathlib/Topology/ContinuousFunction/ZeroAtInfty.lean 27 15 ['Parcly-Taxel', 'astrainfinita', 'jcommelin', 'leanprover-bot'] nobody
624-70986
1 year ago
679-1094
679 days ago
1-47913
1 day
7909 mcdoll
author:mcdoll
 fix(Tactic/Continuity): remove npowRec and add new tag for Continuous.pow --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-topology t-meta 14/9 Mathlib/Tactic/Continuity.lean,Mathlib/Topology/Category/TopCat/Limits/Basic.lean,test/Continuity.lean 3 2 ['eric-wieser'] nobody
624-70986
1 year ago
904-9886
904 days ago
0-72515
20 hours
7932 eric-wieser
author:eric-wieser
 refactor(Algebra/TrivSqZeroExt): replace with a structure This is dogfooding my claim that "one-field structures are the lesser evil in Lean 4". This runs into the `simp [(stupid_parens)]` bug; or rather, a particular nasty instance of it where the offending simp call is inside `@[simps]`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra awaiting-CI
label:t-algebra$
 155/73 Mathlib/Algebra/DualNumber.lean,Mathlib/Algebra/TrivSqZeroExt.lean,Mathlib/Logic/Equiv/TransferInstance.lean,Mathlib/Topology/Instances/TrivSqZeroExt.lean 4 1 ['github-actions'] nobody
624-70986
1 year ago
unknown
0-0
0 seconds
7962 eric-wieser
author:eric-wieser
 feat: `DualNumber (Quaternion R)` as a `CliffordAlgebra` This provides a clifford algebra isomorphic to the dual quaternions --- - [x] depends on: #7934 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra
label:t-algebra$
 307/7 Mathlib/Algebra/DualNumber.lean,Mathlib/Algebra/QuaternionBasis.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Equivs.lean 3 16 ['github-actions', 'leanprover-community-mathlib4-bot'] nobody
624-70986
1 year ago
unknown
0-0
0 seconds
8364 thorimur
author:thorimur
 feat: `refine?` This PR adds `refine? e`, which suggests replacing unsynthesized `_`'s in `e` with `?_` in order to make `refine e'` work: ```lean example : Nat → Nat := by refine? fun (_ : _) => _ -- Try this: refine fun (_ : _) => ?_ ``` Note that this only suggests replacements for `_`'s present in the syntax; to create goals for implicit or instance arguments, the user is expected to use `refine'`. --- I'm especially open to suggestions on the filename (currently `RefineFix`). I'm also curious if this behaves as expected! Feel free to try it out "in real life" and comment here on edge cases. - [ ] depends on: #8503 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-meta 684/5 Mathlib.lean,Mathlib/Lean/CoreM.lean,Mathlib/Lean/Elab/Tactic/ElabTerm.lean,Mathlib/Lean/Elab/Term.lean,Mathlib/Tactic.lean,Mathlib/Tactic/RefineFix.lean,Mathlib/Util/Delaborators.lean,Mathlib/Util/Syntax.lean,test/RefineFix.lean 9 5 ['j-loreaux', 'leanprover-community-mathlib4-bot', 'thorimur'] nobody
624-70986
1 year ago
880-4720
880 days ago
6-59892
6 days
3575 Kha
author:Kha
 perf: selectively enable precompilation --- This is an initial performance test on Linux. TODO: - [ ] test on macOS and Windows as well - [ ] adapt caching merge-conflict WIP 3/0 lakefile.lean 1 21 ['Kha', 'kim-em', 'leanprover-bot', 'tydeu'] nobody
624-70985
1 year ago
unknown
0-0
0 seconds
4771 thorimur
author:thorimur
 feat: Backtrack minimize Utilities for backtracking in order to attain a minimum according to some arbitrary notion of size when generating lists of parts and alternatives in alternating fashion. Motivated by minimizing the number of generated subgoals under apply-like actions on the goal. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta 482/1 Mathlib/Tactic/Backtracking.lean,test/Backtracking.lean 2 0 [] nobody
624-70985
1 year ago
unknown
0-0
0 seconds
4775 thorimur
author:thorimur
 feat: `SubExpr` utilities This file contains utilities for handling positions in expressions, including folding over subexpressions along with their positions. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-meta 148/0 Mathlib.lean,Mathlib/Lean/SubExpr.lean 2 0 [] nobody
624-70985
1 year ago
unknown
0-0
0 seconds
4785 thorimur
author:thorimur
 feat: ExprWithLevels This introduces `ExprWithLevels`, a means of emulating universe polymorphism for non-constants during metaprogramming. [Description pending] - [ ] depends on: #4786 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-meta 491/1 Mathlib.lean,Mathlib/Lean/Meta/AppBuilder.lean,Mathlib/Lean/Meta/Basic.lean,Mathlib/Lean/Meta/ExprWithLevels.lean 4 1 ['kim-em'] nobody
624-70985
1 year ago
unknown
0-0
0 seconds
4871 j-loreaux
author:j-loreaux
 feat: define the additive submonoid of positive elements in a star ordered ring This file defines the `AddSubmonoid` of nonegative elements `StarOrderedRing.positive R` in a star ordered ring `R` with carrier `{ x : R | 0 ≤ x }` (in fact, the definition only requires `OrderedAddCommMonoid R` to allow for other use cases, but it is primarily intended for `StarOrderedRing R`). Equivalently, this is the `AddSubmonoid` generated by the elements of the form `star s * s`. Even though this technically corresponds to the nonnegative elements, the "positive" terminology is standard throughout the literature (at least in C⋆-algebra theory and operator theory), so we choose to prefer that. The advantage of using this over other definitions of positivity is that it allows us to unify several different concepts under a single umbrella. For example, one might be tempted to consider the collection of bounded linear operators on an Hilbert space and define positivity as `∀ x, 0 ≤ ⟪T x, x⟫`, but this doesn't generalize nicely to C⋆-algebras. Alternatively, one could define positivity as those self-adjoint elements with nonnegative spectrum, but this requires the algebra to be unital. Our definition herein conveniently sidesteps these issues. --- Note: I declared the `AddMonoidWithOne` and `AddGroupWithOne` instances for `selfAdjoint R` separately because it made the proof of the latter easier. - [x] depends on: #6229 - [x] depends on: #10209 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra awaiting-CI
label:t-algebra$
 216/12 Mathlib.lean,Mathlib/Algebra/Order/Ring/CharZero.lean,Mathlib/Algebra/Star/Order.lean,Mathlib/Algebra/Star/Positive.lean,Mathlib/Algebra/Star/SelfAdjoint.lean,Mathlib/GroupTheory/Submonoid/Operations.lean 6 28 ['eric-wieser', 'j-loreaux', 'leanprover-community-mathlib4-bot'] nobody
624-70985
1 year ago
1037-57037
1037 days ago
5-55287
5 days
5133 kmill
author:kmill
 feat: IntermediateField adjoin syntax for sets of elements Adds support for both `F⟮S⟯` and `F⟮α⟯`. The term `x` in `F⟮x⟯` is elaborated, and if it has type `Set _` the first interpretation is used, and otherwise the second is. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra
label:t-algebra$
 110/55 Mathlib/FieldTheory/Adjoin.lean 1 0 [] nobody
624-70985
1 year ago
1035-72111
1035 days ago
0-20
20 seconds
5912 ADedecker
author:ADedecker
 feat(Analysis.Distribution.ContDiffMapSupportedIn): space of smooth maps with support in a fixed compact --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-analysis 513/13 Mathlib.lean,Mathlib/Analysis/Distribution/ContDiffMapSupportedIn.lean,Mathlib/Analysis/LocallyConvex/WithSeminorms.lean,Mathlib/Analysis/Seminorm.lean,Mathlib/Data/FunLike/Basic.lean,Mathlib/Data/Set/Function.lean,Mathlib/Topology/Algebra/Module/StrongTopology.lean,Mathlib/Topology/ContinuousFunction/Bounded.lean 8 0 [] nobody
624-70985
1 year ago
unknown
0-0
0 seconds
6002 slerpyyy
author:slerpyyy
 feat(Analysis.SpecialFunctions.Gaussian): add `integrable_fun_mul_exp_neg_mul_sq` If `f : ℝ → ℝ` is bounded by a polynomial, `fun x : ℝ => f x * exp (-b * x ^ 2)` is integrable. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-analysis 26/0 Mathlib/Analysis/SpecialFunctions/Gaussian.lean 1 3 ['ocfnash', 'slerpyyy', 'urkud'] nobody
624-70985
1 year ago
992-71347
992 days ago
9-71263
9 days
6195 eric-wieser
author:eric-wieser
 chore(RingTheory/TensorProduct): golf the `mul` definition --- - [x] depends on: #6211 - [x] depends on: #6187 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) Strangely this causes a timeout downstream merge-conflict t-algebra awaiting-CI
label:t-algebra$
 4/29 Mathlib/RingTheory/TensorProduct.lean 1 1 ['leanprover-community-mathlib4-bot'] nobody
624-70985
1 year ago
unknown
0-0
0 seconds
6307 yuma-mizuno
author:yuma-mizuno
 refactor(CategoryTheory/Monoidal): add whiskering operators We introduce whiskering operators. This allows us to introduce a simp-normal form for morphisms in monoidal categories. Rewriting into simp-normal forms is especially useful when combined with the coherence tactic. --- - [x] depends on: #6420 - [x] depends on: #8191 - [x] depends on: #9988 - [x] depends on: #9991 - [x] depends on: #9995 - [x] depends on: #10061 - [x] depends on: #10078 - [x] depends on: #10898 - [x] depends on: #10912 - [x] depends on: #11223 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory 325/280 Mathlib/Algebra/Category/ModuleCat/Adjunctions.lean,Mathlib/CategoryTheory/Bicategory/End.lean,Mathlib/CategoryTheory/Closed/Ideal.lean,Mathlib/CategoryTheory/Monoidal/Category.lean,Mathlib/CategoryTheory/Monoidal/Center.lean,Mathlib/CategoryTheory/Monoidal/Free/Basic.lean,Mathlib/CategoryTheory/Monoidal/Free/Coherence.lean,Mathlib/CategoryTheory/Monoidal/Functor.lean,Mathlib/CategoryTheory/Monoidal/FunctorCategory.lean,Mathlib/CategoryTheory/Monoidal/Limits.lean,Mathlib/CategoryTheory/Monoidal/Mon_.lean,Mathlib/CategoryTheory/Monoidal/NaturalTransformation.lean,Mathlib/CategoryTheory/Monoidal/Opposite.lean,Mathlib/CategoryTheory/Monoidal/Transport.lean,test/CategoryTheory/Coherence.lean 15 38 ['eric-wieser', 'github-actions', 'grunweg', 'jcommelin', 'kim-em', 'leanprover-community-mathlib4-bot', 'yuma-mizuno'] nobody
624-70985
1 year ago
763-37259
763 days ago
60-84345
60 days
6328 astrainfinita
author:astrainfinita
 chore: make some instance about `Sub...Class` lower priority Many similar instances have been marked as lower priority. I'd like to see if this would make things faster. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra awaiting-CI
label:t-algebra$
 14/14 Mathlib/RingTheory/NonUnitalSubsemiring/Basic.lean,Mathlib/RingTheory/Subsemiring/Basic.lean,lean-toolchain 3 1 ['digama0'] nobody
624-70985
1 year ago
unknown
0-0
0 seconds
6330 astrainfinita
author:astrainfinita
 chore: make some instance about `Sub...Class` higher priority than `Sub...` The opposite direction to #6328. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra slow-typeclass-synthesis
label:t-algebra$
 123/128 Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Star/NonUnitalSubalgebra.lean,Mathlib/FieldTheory/IsAlgClosed/Basic.lean,Mathlib/FieldTheory/Subfield.lean,Mathlib/RingTheory/NonUnitalSubring/Basic.lean,Mathlib/RingTheory/NonUnitalSubsemiring/Basic.lean,Mathlib/RingTheory/Polynomial/Quotient.lean,Mathlib/RingTheory/Subring/Basic.lean,Mathlib/RingTheory/Subsemiring/Basic.lean,lean-toolchain 11 13 ['astrainfinita', 'digama0', 'leanprover-bot'] nobody
624-70985
1 year ago
unknown
0-0
0 seconds
6403 astrainfinita
author:astrainfinita
 chore: change instance priorities of `Ordered*` hierarchy --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-order merge-conflict slow-typeclass-synthesis awaiting-author
label:t-algebra$
 253/79 Mathlib/Algebra/Order/CompleteField.lean,Mathlib/Algebra/Order/Field/Canonical/Defs.lean,Mathlib/Algebra/Order/Field/Defs.lean,Mathlib/Algebra/Order/Group/Defs.lean,Mathlib/Algebra/Order/Monoid/Basic.lean,Mathlib/Algebra/Order/Monoid/Canonical/Defs.lean,Mathlib/Algebra/Order/Monoid/Defs.lean,Mathlib/Algebra/Order/Monoid/WithZero/Defs.lean,Mathlib/Algebra/Order/Ring/Canonical.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Order/Ring/Star.lean,Mathlib/Algebra/Order/WithZero.lean,Mathlib/Analysis/InnerProductSpace/Orientation.lean,Mathlib/LinearAlgebra/Orientation.lean,Mathlib/RingTheory/HahnSeries.lean,Mathlib/RingTheory/LaurentSeries.lean,Mathlib/Tactic/Positivity/Core.lean,Mathlib/Topology/Algebra/WithZeroTopology.lean 18 39 ['Vierkantor', 'astrainfinita', 'digama0', 'eric-wieser', 'j-loreaux', 'leanprover-bot'] nobody
624-70985
1 year ago
869-23727
869 days ago
13-18399
13 days
6491 eric-wieser
author:eric-wieser
 chore(Mathlib/Algebra/Hom/GroupAction): add `SMulHomClass.comp_smul` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 24/10 Mathlib/Algebra/Hom/GroupAction.lean 1 0 [] nobody
624-70985
1 year ago
896-56985
896 days ago
83-76369
83 days
7076 grunweg
author:grunweg
 feat: define measure zero subsets of a manifold A topological manifold has no canonical measure, but there is a canonical notion of measure zero subsets. We show that these are closed under subsets and countable unions (hence define a filter, the almost everywhere filter) and that a closed nowhere dense has empty interior. This is necessary for stating the general version of Sard's theorem (in finite dimensions), and a first step towards its proof. This code was written at LftCM 2023. Thanks for @fpvandoorn for mentoring me! :heart: --- Unresolved questions/looking for feedback - Is "measure zero" a good name or would "null set" be better? I tend towards the former, but welcome input from a measure theorist (which I'm not). - What is the correct definition? One could also define "measure zero" using any `IsOpenPosMeasure` on the charted space. I think all results in this file still hold then, but for applications (e.g., Sard's theorem), this might be too general. - define custom notation, similar to the a.e. filter on a measure space? (We could include $J$ instead of $\mu$.) - what's the right syntax for formulas in docstrings --- use LaTeX or backticks? I don't know how to preview the generated docs, the guidelines are a bit ambiguous for me. merge-conflict WIP t-differential-geometry t-measure-probability 165/0 Mathlib.lean,Mathlib/Geometry/Manifold/MeasureZero.lean,docs/references.bib 3 27 ['ADedecker', 'github-actions', 'grunweg', 'mo271', 'sgouezel'] ADedecker
assignee:ADedecker
624-70985
1 year ago
779-68294
779 days ago
43-56110
43 days
3757 thorimur
author:thorimur
 feat: config options for `fail_if_no_progress` This PR creates config options for `fail_if_no_progress` that allow the user to tweak what exactly counts as "progress". This includes whether to use defeq or `BEq`, what transparency to use, and which parts of the goal and local context to check. It also splits off the comparison functionality into `Mathlib.Lean.Meta.Compare`, which provides fully configurable comparison functions for common complex metaprogramming types not specific to `fail_if_no_progress`. These types are `Expr`, `LocalDecl`, `LocalContext`, `MetavarDecl`, `MVarId`, and `List MVarId`. --- See [zulip](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/progress.20on.20fail_if_no_progress) for a couple review questions. Status update: this PR is now basically done, save for some extra tests which should probably be included. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-meta 603/54 Mathlib.lean,Mathlib/Lean/Meta.lean,Mathlib/Lean/Meta/Compare.lean,Mathlib/Tactic/FailIfNoProgress.lean,test/fail_if_no_progress.lean 5 38 ['alexjbest', 'github-actions', 'joneugster', 'kim-em', 'thorimur'] nobody
624-70984
1 year ago
964-8720
964 days ago
45-49128
45 days
12353 thorimur
author:thorimur
 feat: `conv%` This PR introduces `conv% e => tac`, along with `simp%`, `norm_num%`, and `push_neg%`, which are defined in terms of `conv%`. It also introduces `conv%?` (and `simp%?`, `norm_num%?`, and `push_neg%?`) as shortcuts for `show_term ...`. This is a relatively straightforward refactor of code already present in the implementation of `#conv`, and otherwise relies entirely on simple macros. This PR also introduces some modifications to existing command syntax for `#conv`, `#simp`, and `#norm_num`: * The syntax for `#conv` was `#conv tac => e`; however, this is inconsistent with the tactic syntax, and so this has been flipped to `#conv e => tac`. Likewise, `conv%` uses the same (new) syntax `conv% e => tac`. * `#simp` and `#norm_num` separated their config and `only` syntax from the expression by an optional `=>` (for `#simp`) and an optional `:` (for `#norm_num`) (e.g. `#simp only [lem] => e`). These have both been replaced with an optional`on` (e.g. `#simp only [lem] on e`) which is also used for `simp%` and `norm_num%`. Although `#whnf` is implemented in terms of `#conv`, this PR doesn't introduce `whnf%` in the same way, as that's probably better off being implemented directly instead of through `conv`. --- WIP: needs tests. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-meta 131/32 Mathlib/Tactic/Conv.lean,Mathlib/Tactic/NormNum/Core.lean,Mathlib/Tactic/PushNeg.lean,docs/Conv/Guide.lean 4 0 [] nobody
620-47294
1 year ago
723-85336
723 days ago
0-17
17 seconds
13852 astrainfinita
author:astrainfinita
 perf: skip some typeclasses in TC search --- - [ ] depends on: #7873 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict slow-typeclass-synthesis blocked-by-other-PR 45/33 Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Ring/Defs.lean,Mathlib/RingTheory/Norm.lean 3 21 ['MichaelStollBayreuth', 'astrainfinita', 'github-actions', 'leanprover-bot', 'leanprover-community-mathlib4-bot'] nobody
620-40974
1 year ago
unknown
0-0
0 seconds
7903 urkud
author:urkud
 feat: define `UnboundedSpace` --- The new instances generate some timeouts, and I don't understand why. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict help-wanted t-topology 111/59 Mathlib/Analysis/BoxIntegral/Basic.lean,Mathlib/Analysis/Normed/Module/Basic.lean,Mathlib/Topology/Bornology/Basic.lean,Mathlib/Topology/Bornology/Constructions.lean,Mathlib/Topology/MetricSpace/Bounded.lean,Mathlib/Topology/MetricSpace/GromovHausdorffRealized.lean 6 1 ['github-actions'] nobody
617-58963
1 year ago
unknown
0-0
0 seconds
15679 adomani
author:adomani
 test: refactor in CI --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 213/5 .github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build.yml.in,.github/workflows/build_fork.yml,Mathlib.lean,Mathlib/Algebra/Homology/HomotopyCategory/SingleFunctors.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Order.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Unique.lean,Mathlib/Analysis/Convex/Combination.lean,Mathlib/Analysis/Convex/Segment.lean,Mathlib/CategoryTheory/Bicategory/Adjunction.lean,Mathlib/CategoryTheory/Monoidal/Braided/Basic.lean,Mathlib/CategoryTheory/Monoidal/Center.lean,Mathlib/GroupTheory/Coxeter/Matrix.lean,Mathlib/Order/Filter/Cocardinal.lean,Mathlib/Order/UpperLower/Basic.lean,Mathlib/TestRefactor.lean,Refactor/Main.lean,lakefile.lean,lean-toolchain 21 1 ['github-actions'] nobody
612-28139
1 year ago
614-37581
614 days ago
0-8
8 seconds
7565 shuxuezhuyi
author:shuxuezhuyi
 feat(Topology/Algebra/Order): extend homeomorphism of `Ioo` to `Icc` We extend the homeomorphisms between open intervals to homeomorphisms between the closed intervals. --- - [ ] depends on: #7018 - [ ] depends on: #7351 - [ ] depends on: #7564 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology blocked-by-other-PR t-order 389/5 Mathlib.lean,Mathlib/Data/Set/Intervals/Image.lean,Mathlib/Order/Directed.lean,Mathlib/Topology/Algebra/Order/IccExtendFromIoo.lean,Mathlib/Topology/Algebra/Order/IntermediateValue.lean 5 1 ['leanprover-community-mathlib4-bot'] nobody
610-64639
1 year ago
922-45518
922 days ago
0-222
3 minutes
10629 madvorak
author:madvorak
 feat: List.cons_sublist_append_iff_right --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 11/0 Mathlib/Data/List/Basic.lean 1 1 ['eric-wieser'] nobody
610-64530
1 year ago
736-73367
736 days ago
53-73442
53 days
9973 Ruben-VandeVelde
author:Ruben-VandeVelde
 feat: polynomials formed by lists From https://github.com/leanprover-community/mathlib/pull/15476 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt merge-conflict t-data 311/0 Mathlib.lean,Mathlib/Data/Polynomial/OfList.lean 2 0 [] nobody
610-64063
1 year ago
unknown
0-0
0 seconds
12926 joelriou
author:joelriou
 feat(CategoryTheory): the monoidal category structure induced by a monoidal functor In this PR, given a monoidal functor `F : MonoidalFunctor C D`, we define a monoidal category structure on the category `InducedCategory D F.obj`, which has the "same" objects as `C`, but the morphisms between `X` and `Y` identify to `F.obj X ⟶ F.obj Y`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-category-theory 105/0 Mathlib.lean,Mathlib/CategoryTheory/Monoidal/Induced.lean 2 3 ['eric-wieser', 'github-actions', 'joelriou'] nobody
610-62462
1 year ago
701-67667
701 days ago
0-10
10 seconds
12869 adomani
author:adomani
 feat: linter and script for `theorem` vs `lemma` This PR contains a linter for flagging doc-string-less `theorem`s, as well as a bash script that, once the linter ran on Mathlib, automatically replaces every linter-offending `theorem` by `lemma`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-linter awaiting-author 106/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/ThmLemma.lean,scripts/thmLemma.sh 4 13 ['adomani', 'github-actions', 'grunweg', 'joneugster'] nobody
610-49226
1 year ago
664-69721
664 days ago
38-16364
38 days
14563 awueth
author:awueth
 feat: if-then-else of exclusive or statement --- If `¬(P ∧ Q)` then `ite (P ∨ Q) a 1 = (ite P a 1) * (ite Q a 1)` [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-algebra new-contributor
label:t-algebra$
 5/0 Mathlib/Algebra/Group/Basic.lean 1 3 ['eric-wieser', 'github-actions', 'kim-em'] nobody
609-63378
1 year ago
640-23960
640 days ago
6-38745
6 days
14308 grhkm21
author:grhkm21
 feat(Algebra/Category): Direct construction of colimits in algebraic categories (Below I only write about colimits since that's what I'm familiar with after working on it the last few days, but maybe it's the same for other categorical constructions) **Main feature:** Construct colimits in `AddCommGrp`/`ModuleCat`/`FGModuleCat`(/...) directly as coequalizer (i.e. cokernel i.e. quotient) of two maps, allowing one to say $\coprod_j M_j \cong *$ Currently, if you look at how colimits are constructed for [AddCommGrp](https://github.com/leanprover-community/mathlib4/blob/master/Mathlib/Algebra/Category/Grp/Colimits.lean#L69-L92), you see this massive block of code of all relations generating the quotient relation, but that's kind of bad, you can't say anything concretely about it. Also as noted in the TODOs of a few files: ``` TODO: In fact, in `ModuleCat R` there is a much nicer model of colimits as quotients of finitely supported functions, and we really should implement this as well. ``` I wrote it down [here](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Braided.20left.20rigid.20categories.20are.20right.20rigid/near/447490672), and **have formalised it** in a small file already [here](https://gist.github.com/grhkm21/5b2d938753c0ce0900d21c93a39e3b7d#file-addcommgrpcolimits-lean-L162-L163) (I also have a `ModuleCat` version, and proving existence of colimits in `FGModuleCat` from it). Usually I will try to merge the file into Mathlib directly (preferably in one sitting), but I have been trying for a while now and been struggling. One issue is I am struggling to understand universes, which I asked [here](https://leanprover.zulipchat.com/#narrow/stream/113489-new-members/topic/Universe.20constraints!/near/448049266) along with many other places. A more concrete issue is that - [ ] FGModuleCat (and `FullSubcategory` in general) requires morphism and objects to be on the same universe, whereas generally `Category.{v, u}` don't. So that seems to limit what I can express, and maybe I have to fix it first. Here are a few more TODOs just so I don't forget, probably done before the one above: - [ ] Generalise `cokernelIsoQuotient` to other categories. - [ ] Also prove `coproductIsoDirectSum` - [ ] Also prove coequalizer (f + h) (g + h) ~ coequalizer f g ~ cokernel (f - g) 0 - [ ] Fix typo `FGModuleCatCat` If anyone is familiar with universe stuff and can answer my many questions that'll be great too. I need help understanding just [these five lines](https://github.com/leanprover-community/mathlib4/blob/master/Mathlib/Algebra/Category/Grp/Colimits.lean#L267-L271) merge-conflict WIP t-algebra
label:t-algebra$
 10/3 Mathlib/Algebra/DirectSum/Module.lean,Mathlib/LinearAlgebra/FreeModule/Basic.lean 2 1 ['github-actions'] nobody
609-61247
1 year ago
655-9524
655 days ago
0-23
23 seconds
13010 ADedecker
author:ADedecker
 feat: relax universe constraint in stoneCechExtend --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology 33/3 Mathlib/Topology/StoneCech.lean 1 2 ['ADedecker', 'erdOne'] nobody
609-61044
1 year ago
unknown
0-0
0 seconds
12411 adomani
author:adomani
 feat: more linting of cdots --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-linter 953/617 Archive/Wiedijk100Theorems/CubingACube.lean,Mathlib.lean,Mathlib/Algebra/Category/GroupCat/Colimits.lean,Mathlib/Algebra/Homology/Exact.lean,Mathlib/Algebra/Homology/LocalCohomology.lean,Mathlib/Algebra/Lie/Nilpotent.lean,Mathlib/Algebra/Module/PID.lean,Mathlib/Algebra/Module/Submodule/Bilinear.lean,Mathlib/Algebra/Module/Torsion.lean,Mathlib/Algebra/MonoidAlgebra/Basic.lean,Mathlib/Algebra/Order/Archimedean.lean,Mathlib/AlgebraicGeometry/StructureSheaf.lean,Mathlib/Analysis/Analytic/Composition.lean,Mathlib/Analysis/Calculus/Deriv/Slope.lean,Mathlib/Analysis/Calculus/InverseFunctionTheorem/ApproximatesLinearOn.lean,Mathlib/Analysis/Calculus/LocalExtr/Basic.lean,Mathlib/Analysis/Calculus/TangentCone.lean,Mathlib/Analysis/InnerProductSpace/Basic.lean,Mathlib/Analysis/InnerProductSpace/Projection.lean,Mathlib/Analysis/MeanInequalitiesPow.lean,Mathlib/Analysis/Normed/Group/ControlledClosure.lean,Mathlib/Analysis/Normed/Group/Pointwise.lean,Mathlib/Analysis/NormedSpace/FiniteDimension.lean,Mathlib/Analysis/NormedSpace/HahnBanach/Separation.lean,Mathlib/Analysis/NormedSpace/Multilinear/Basic.lean,Mathlib/Analysis/NormedSpace/Star/Basic.lean,Mathlib/Analysis/NormedSpace/Star/Multiplier.lean,Mathlib/Analysis/NormedSpace/lpSpace.lean,Mathlib/Analysis/PSeries.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/Analysis/SpecialFunctions/Complex/Arg.lean,Mathlib/Analysis/SpecialFunctions/Log/Base.lean,Mathlib/Analysis/SpecialFunctions/Log/Monotone.lean,Mathlib/Analysis/SpecialFunctions/Pow/NNReal.lean,Mathlib/Analysis/SpecialFunctions/Pow/Real.lean,Mathlib/Analysis/SpecificLimits/Normed.lean,Mathlib/CategoryTheory/Abelian/Basic.lean,Mathlib/CategoryTheory/Action.lean,Mathlib/CategoryTheory/Bicategory/NaturalTransformation.lean,Mathlib/CategoryTheory/Category/Cat/Limit.lean,Mathlib/CategoryTheory/Category/PartialFun.lean,Mathlib/CategoryTheory/Category/TwoP.lean,Mathlib/CategoryTheory/Closed/Cartesian.lean,Mathlib/CategoryTheory/Functor/Flat.lean,Mathlib/CategoryTheory/Galois/GaloisObjects.lean,Mathlib/CategoryTheory/Limits/Over.lean,Mathlib/CategoryTheory/Limits/VanKampen.lean,Mathlib/CategoryTheory/Localization/Predicate.lean,Mathlib/CategoryTheory/Monad/Coequalizer.lean,Mathlib/CategoryTheory/Monad/Monadicity.lean,Mathlib/CategoryTheory/Pi/Basic.lean,Mathlib/CategoryTheory/Sites/DenseSubsite.lean,Mathlib/CategoryTheory/Sites/InducedTopology.lean,Mathlib/CategoryTheory/Subobject/Lattice.lean,Mathlib/Combinatorics/Additive/PluenneckeRuzsa.lean,Mathlib/Combinatorics/HalesJewett.lean,Mathlib/Combinatorics/SimpleGraph/Regularity/Chunk.lean,Mathlib/Computability/Reduce.lean,Mathlib/Data/Holor.lean,Mathlib/Data/Nat/Multiplicity.lean,Mathlib/Data/Nat/Pairing.lean,Mathlib/Data/Real/Cardinality.lean,Mathlib/Data/Real/Hyperreal.lean,Mathlib/Data/Real/Irrational.lean,Mathlib/Data/Set/Card.lean,Mathlib/Dynamics/Circle/RotationNumber/TranslationNumber.lean,Mathlib/FieldTheory/Finite/Polynomial.lean,Mathlib/FieldTheory/Minpoly/IsIntegrallyClosed.lean,Mathlib/FieldTheory/PerfectClosure.lean,Mathlib/FieldTheory/RatFunc.lean,Mathlib/Geometry/RingedSpace/OpenImmersion.lean,Mathlib/Geometry/RingedSpace/PresheafedSpace/Gluing.lean,Mathlib/GroupTheory/GroupAction/Quotient.lean,Mathlib/GroupTheory/Nilpotent.lean,Mathlib/GroupTheory/Perm/Cycle/Factors.lean,Mathlib/GroupTheory/Perm/Finite.lean,Mathlib/GroupTheory/SpecificGroups/Quaternion.lean,Mathlib/GroupTheory/Sylow.lean,Mathlib/LinearAlgebra/Dimension/RankNullity.lean,Mathlib/LinearAlgebra/Dual.lean,Mathlib/LinearAlgebra/LinearIndependent.lean,Mathlib/LinearAlgebra/LinearPMap.lean,Mathlib/LinearAlgebra/Matrix/Charpoly/Coeff.lean,Mathlib/LinearAlgebra/Prod.lean,Mathlib/LinearAlgebra/QuadraticForm/Complex.lean,Mathlib/LinearAlgebra/Reflection.lean,Mathlib/MeasureTheory/Constructions/Pi.lean,Mathlib/MeasureTheory/Covering/VitaliFamily.lean,Mathlib/MeasureTheory/Measure/Haar/Basic.lean,Mathlib/MeasureTheory/Measure/MeasureSpace.lean,Mathlib/MeasureTheory/Measure/Typeclasses.lean,Mathlib/MeasureTheory/OuterMeasure/Basic.lean,Mathlib/ModelTheory/Skolem.lean,Mathlib/NumberTheory/Dioph.lean,Mathlib/NumberTheory/LegendreSymbol/Basic.lean,Mathlib/NumberTheory/Padics/Hensel.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/NumberTheory/Padics/RingHoms.lean,Mathlib/NumberTheory/RamificationInertia.lean,Mathlib/RingTheory/AdjoinRoot.lean 147 2 ['adomani', 'leanprover-bot'] nobody
609-60907
1 year ago
unknown
0-0
0 seconds
12279 casavaca
author:casavaca
 WIP: feat: Holder's inequality n-ary --- - [x] depends on #12291 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-analysis 129/0 Mathlib/Analysis/MeanInequalities.lean,Mathlib/Analysis/SpecialFunctions/Pow/Real.lean 2 13 ['github-actions'] nobody
609-60892
1 year ago
726-35597
726 days ago
0-50185
13 hours
12093 ADedecker
author:ADedecker
 feat: tweak the definition of semicontinuity to behave better in nonlinear orders Summary of the changes: - change definitions to make [lowerSemicontinuous_iff_isClosed_preimage](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Topology/Semicontinuous.html#lowerSemicontinuous_iff_isClosed_preimage) true without assuming `LinearOrder`, so that semicontinuity corresponds to continuity for lower/upper order topology on the codomain. See discussion on [Zulip](https://leanprover.zulipchat.com/#narrow/stream/116395-maths/topic/Semicontinuity.20definition.20for.20non-linear.20orders/near/432898278) - add new `iff` lemmas for unfolding the definition - add `iff` lemmas with the old definition in the linearly ordered case - some basic lemmas need to be changed in an easy way - minimize assumptions for continuity => semicontinuity - prove the semicontinuity criterion for indicators using "preimage of Ici/Iic" instead of a direct proof, because the proof is more natural (especially because we have no `filter_upwards` for `Frequently`) - in the rest of the file (which is about linear orders anyway), we don't touch the statements and just rewrite to the old definition. Some of these could be generalized, but we keep that for a later PR. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-topology 274/130 Mathlib/Analysis/BoundedVariation.lean,Mathlib/MeasureTheory/Integral/FundThmCalculus.lean,Mathlib/Order/Filter/Basic.lean,Mathlib/Topology/Semicontinuous.lean 4 0 [] nobody
609-60854
1 year ago
unknown
0-0
0 seconds
11520 thorimur
author:thorimur
 feat: `linting_rules` and deprecated syntax --- Experimental. WIP. Might not be performance-viable. - [ ] depends on: #11519 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-meta 1016/0 Mathlib.lean,Mathlib/Command/Linter.lean,Mathlib/Command/Linter/Deprecated.lean,Mathlib/Command/Linter/LintingRules.lean,Mathlib/Command/SyntaxRules.lean,Mathlib/Command/SyntaxRules/Attr.lean,Mathlib/Command/SyntaxRules/Elab.lean,Mathlib/Command/SyntaxRules/Header.lean,Mathlib/Command/SyntaxRules/Util.lean,Mathlib/Tactic/Common.lean,scripts/noshake.json 11 11 ['leanprover-bot', 'leanprover-community-mathlib4-bot', 'thorimur'] nobody
609-60844
1 year ago
unknown
0-0
0 seconds
11519 thorimur
author:thorimur
 feat: `syntax_rules` --- Experimental. WIP. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta 485/0 Mathlib.lean,Mathlib/Command/SyntaxRules.lean,Mathlib/Command/SyntaxRules/Attr.lean,Mathlib/Command/SyntaxRules/Elab.lean,Mathlib/Command/SyntaxRules/Header.lean,Mathlib/Command/SyntaxRules/Util.lean,scripts/noshake.json 7 0 [] nobody
609-60830
1 year ago
unknown
0-0
0 seconds
11393 mcdoll
author:mcdoll
 feat(Analysis/Distribution/SchwartzSpace): The Heine-Borel property --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-analysis 688/3 Mathlib.lean,Mathlib/Analysis/Distribution/SchwartzSpace.lean,Mathlib/Topology/Constructions.lean,Mathlib/Topology/UniformSpace/Ascoli.lean,Mathlib/Topology/UniformSpace/Pi.lean,Mathlib/Topology/UniformSpace/UniformConvergenceTopology.lean 6 0 [] nobody
609-60820
1 year ago
unknown
0-0
0 seconds
9444 erdOne
author:erdOne
 feat: Various instances regarding `𝓞 K`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict help-wanted t-number-theory 27/0 Mathlib/NumberTheory/NumberField/Basic.lean,Mathlib/RingTheory/IntegralClosure.lean 2 9 ['erdOne', 'leanprover-bot', 'mattrobball', 'riccardobrasca', 'xroblot'] nobody
609-60739
1 year ago
831-60166
831 days ago
1-62292
1 day
8931 hmonroe
author:hmonroe
 feat(Computable): define P, NP, and NP-complete Revised to focus on languages that are binary strings, given the issue of non-acceptable encodings of unspecified Types --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability awaiting-author 381/5 Mathlib.lean,Mathlib/Computability/Complexity copy.lean,Mathlib/Computability/Complexity.lean,Mathlib/Computability/Encoding.lean,Mathlib/Computability/TMComputable.lean,Mathlib/Computability/TuringMachine.lean,Mathlib/Computability/halting example.lean,docs/references.bib 8 3 ['fpvandoorn', 'github-actions', 'hmonroe'] nobody
609-60704
1 year ago
765-70086
765 days ago
93-64275
93 days
10641 newell
author:newell
 feat(Topology/MetricSpace/WellSpaced): Define sets that are *well-spaced*. Create a new file `Mathlib.Topology.MetricSpace.WellSpaced` that contains definitions of sets which are in some sense *well-spaced*. Some examples are Delone and Meyer sets, which find applications in Quasicrystals and Coding Theory, among others. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology 1073/14 Mathlib.lean,Mathlib/Analysis/LocallyConvex/WithSeminorms.lean,Mathlib/Topology/EMetricSpace/Basic.lean,Mathlib/Topology/GMetric/Basic.lean,Mathlib/Topology/GMetric/GInfSep.lean,Mathlib/Topology/GMetric/WellSpaced.lean,Mathlib/Topology/GPseudoMetric/Basic.lean,Mathlib/Topology/MetricSpace/WellSpaced.lean 8 1 ['edegeltje'] nobody
609-60672
1 year ago
unknown
0-0
0 seconds
10387 adomani
author:adomani
 feat(Tactic/ComputeDegree): add `polynomial` tactic Introducing the `polynomial` tactic, summing up `compute_degree, monicity` and adding support for `leadingCoeff`. This is more of a proof of concept: if there is interest in this tactic, I can polish it up. See [this Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/113489-new-members/topic/Compute.20roots.20of.20polynomials/near/420713624). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP RFC t-meta 24/0 Mathlib/Tactic/ComputeDegree.lean 1 0 [] nobody
609-60526
1 year ago
653-43556
653 days ago
143-73801
143 days
9154 astrainfinita
author:astrainfinita
 feat: `npow` / `nsmul` / `Nat.cast`/ `zpow` / `zsmul` implemented using `Nat.binaryRec` --- - [ ] depends on: https://github.com/leanprover/lean4/pull/3756 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra blocked-by-other-PR
label:t-algebra$
 168/359 Mathlib/Algebra/Group/Defs.lean,Mathlib/Computability/PartrecCode.lean,Mathlib/Computability/Primrec.lean,Mathlib/Data/Bool/Basic.lean,Mathlib/Data/Int/Bitwise.lean,Mathlib/Data/Nat/Bits.lean,Mathlib/Data/Nat/Bitwise.lean,Mathlib/Data/Nat/Digits.lean,Mathlib/Data/Nat/EvenOddRec.lean,Mathlib/Data/Nat/Fib/Basic.lean,Mathlib/Data/Nat/Multiplicity.lean,Mathlib/Data/Nat/Order/Basic.lean,Mathlib/Data/Nat/Parity.lean,Mathlib/Data/Nat/Size.lean,Mathlib/Data/Num/Lemmas.lean,Mathlib/Init/Data/Nat/Bitwise.lean,Mathlib/LinearAlgebra/TensorProduct/Graded/Internal.lean,Mathlib/Logic/Basic.lean,Mathlib/Logic/Denumerable.lean,Mathlib/Logic/Encodable/Basic.lean,Mathlib/Logic/Equiv/Basic.lean,Mathlib/Logic/Equiv/Nat.lean,lake-manifest.json,lakefile.lean,test/zmod.lean 25 7 ['astrainfinita', 'eric-wieser', 'kim-em', 'leanprover-community-mathlib4-bot'] nobody
609-60317
1 year ago
unknown
0-0
0 seconds
6603 tydeu
author:tydeu
 feat: automatically try `cache get` before build --- A quick proof-of-concept. With this, `lake build` will always try `cache get` before building mathlib. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP CI 29/0 lakefile.lean 1 3 ['kim-em', 'tydeu'] nobody
609-60291
1 year ago
963-76814
963 days ago
11-2031
11 days
6058 apurvnakade
author:apurvnakade
 feat: duality theory for cone programs This PR tracks the development of duality theory for cone programs. [Reference](https://ti.inf.ethz.ch/ew/courses/ApproxSDP09/notes/conelp.pdf) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #6059 - [ ] define direct sum of cones - [ ] weak duality - [ ] regular duality - [ ] slater condition - [ ] strong duality merge-conflict WIP t-analysis 159/0 Mathlib.lean,Mathlib/Analysis/Convex/Cone/ConeLinearProgram.lean 2 1 ['leanprover-community-mathlib4-bot'] nobody
609-60236
1 year ago
999-10744
999 days ago
0-9
9 seconds
6449 ADedecker
author:ADedecker
 feat: functions with finite fibers --- This has been discussed before on [Zulip](https://leanprover.zulipchat.com/#narrow/stream/217875-Is-there-code-for-X.3F/topic/.E2.9C.94.20Cofinite.20maps.3F) and it came up again while working with @kkytola's student. As explained in the docstring, we could absolutely just use `Tendsto f cofinite cofinite` all the time, but (1) we lack some API for it (2) the API is nicer to setup if we have a separate def (e.g for dot notation) and (3) mentioning filters for such a simple concept is really not beginner-friendly. I'm not sure at all about the name. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-topology 203/0 Mathlib.lean,Mathlib/Logic/Function/HasFiniteFibers.lean,Mathlib/Order/Filter/Basic.lean,Mathlib/Order/Filter/Cofinite.lean 4 14 ['ADedecker', 'YaelDillies', 'alexjbest', 'kkytola'] nobody
609-60230
1 year ago
975-58284
975 days ago
6-70040
6 days
8100 digama0
author:digama0
 feat: add support for other types in norm_num --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta 177/12 Mathlib/Tactic/NormNum/Basic.lean,Mathlib/Tactic/NormNum/Eq.lean,Mathlib/Tactic/NormNum/Ineq.lean,Mathlib/Tactic/NormNum/Pow.lean,Mathlib/Tactic/NormNum/Result.lean,Mathlib/Tactic/NormNum/Structural.lean,test/norm_num.lean 7 4 ['dwrensha'] nobody
609-60098
1 year ago
unknown
0-0
0 seconds
13163 erdOne
author:erdOne
 feat(.vscode/module-docstring.code-snippet): Prevent auto-complete from firing on `do` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-meta 5/0 .vscode/module-docstring.code-snippets 1 5 ['erdOne', 'grunweg', 'robertylewis', 'trivial1711'] nobody
609-58840
1 year ago
641-73032
641 days ago
50-78405
50 days
15585 astrainfinita
author:astrainfinita
 test make `HasQuotient.quotient'` reducible --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 8/1 Mathlib/Algebra/Quotient.lean,Mathlib/GroupTheory/Coset.lean 2 1 ['github-actions'] nobody
608-6106
1 year ago
unknown
0-0
0 seconds
15586 astrainfinita
author:astrainfinita
 test make `HasQuotient` out put a `setoid` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 22/36 Mathlib/Algebra/Lie/CartanExists.lean,Mathlib/Algebra/Lie/Quotient.lean,Mathlib/Algebra/Lie/Weights/Basic.lean,Mathlib/Algebra/Quotient.lean,Mathlib/Analysis/Normed/Group/AddCircle.lean,Mathlib/GroupTheory/Commensurable.lean,Mathlib/GroupTheory/Coset.lean,Mathlib/GroupTheory/CosetCover.lean,Mathlib/GroupTheory/GroupAction/Quotient.lean,Mathlib/GroupTheory/Nilpotent.lean,Mathlib/GroupTheory/QuotientGroup.lean,Mathlib/LinearAlgebra/Quotient.lean,Mathlib/RingTheory/Ideal/Quotient.lean,Mathlib/Topology/Algebra/UniformRing.lean 14 5 ['astrainfinita', 'github-actions', 'leanprover-bot'] nobody
608-6106
1 year ago
unknown
0-0
0 seconds
13791 digama0
author:digama0
 refactor: Primrec and Partrec General cleanup of the `Primrec` and `Partrec` files, to better adjust to lean 4 things. The main user-visible change is that `Primrec₂` is no longer a `def` but an `abbrev`, because it was causing inference issues in lean 4. I also removed all the nonterminal `simp`s in `PartrecCode.lean`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability tech debt 585/778 Mathlib/Computability/Ackermann.lean,Mathlib/Computability/Halting.lean,Mathlib/Computability/Partrec.lean,Mathlib/Computability/PartrecCode.lean,Mathlib/Computability/Primrec.lean 5 2 ['github-actions', 'grunweg'] nobody
606-27375
1 year ago
670-16961
670 days ago
1-84718
1 day
12418 rosborn
author:rosborn
 style: replace preimage_val with ↓∩ notation --- This is a rough draft of what the new `↓∩` notation would look like within mathlib. I believe this is an improvement in clarity and would like to have `↓∩` as a standard notation (along with `''`, `⁻¹'`, `↑`, etc...). As `↓∩` is specialized for `Set`s, I have only changed `preimage_val` when the left-hand side of `↓∩` is a `Set`. The introduction of the `↓∩` notation to Data.Set.Image is temporary as it isn't possible to import Data.Set.Subset directly. If we want `↓∩` unscoped, where would be the best place to define it? An option is Data.Set.Defs, but the notation cannot be defined without additional imports as the file does not import `notation3`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 56/61 Mathlib/Analysis/InnerProductSpace/Projection.lean,Mathlib/Data/Set/Function.lean,Mathlib/Data/Set/Image.lean,Mathlib/Data/Set/Subset.lean,Mathlib/MeasureTheory/Constructions/Polish.lean,Mathlib/MeasureTheory/MeasurableSpace/Basic.lean,Mathlib/MeasureTheory/Measure/Restrict.lean,Mathlib/Order/UpperLower/Basic.lean,Mathlib/Topology/Bases.lean,Mathlib/Topology/Clopen.lean,Mathlib/Topology/Connected/Basic.lean,Mathlib/Topology/Connected/PathConnected.lean,Mathlib/Topology/Constructions.lean,Mathlib/Topology/ContinuousOn.lean,Mathlib/Topology/LocalAtTarget.lean,Mathlib/Topology/LocallyConstant/Basic.lean,Mathlib/Topology/Separation.lean,Mathlib/Topology/Sober.lean 18 3 ['grunweg', 'rosborn'] nobody
606-27133
1 year ago
692-37117
692 days ago
29-50022
29 days
9978 astrainfinita
author:astrainfinita
 chore(FieldTheory/KummerExtension): move some lemmas earlier --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 197/177 Mathlib.lean,Mathlib/Data/Polynomial/FieldDivision.lean,Mathlib/FieldTheory/KummerExtension.lean,Mathlib/RingTheory/AdjoinRoot.lean,Mathlib/RingTheory/Polynomial/Irreducible.lean 5 5 ['alreadydone', 'grunweg', 'riccardobrasca'] nobody
606-26925
1 year ago
804-21107
804 days ago
8-83342
8 days
12429 adomani
author:adomani
 feat: toND -- auto-generating natDegree This is an experiment to automatically translate theorems about `degree` to theorems about `natDegree`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra RFC merge-conflict awaiting-author t-meta
label:t-algebra$
 167/132 Mathlib.lean,Mathlib/Algebra/Polynomial/Degree/Definitions.lean,Mathlib/Algebra/Polynomial/Degree/Lemmas.lean,Mathlib/Algebra/Polynomial/EraseLead.lean,Mathlib/Algebra/Polynomial/HasseDeriv.lean,Mathlib/Algebra/Polynomial/Inductions.lean,Mathlib/Algebra/Polynomial/Mirror.lean,Mathlib/Algebra/Polynomial/Reverse.lean,Mathlib/Tactic.lean,Mathlib/Tactic/ToNatDegree.lean,scripts/noshake.json 11 2 ['adomani', 'grunweg'] nobody
606-26236
1 year ago
717-60309
717 days ago
3-76602
3 days
15823 eric-wieser
author:eric-wieser
 Quotients of rings in model theory --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-logic 55/13 Mathlib/ModelTheory/Algebra/Ring/FreeCommRing.lean,Mathlib/ModelTheory/Syntax.lean 2 1 ['github-actions'] nobody
606-4799
1 year ago
unknown
0-0
0 seconds
12178 joneugster
author:joneugster
 feat(Data/Matrix/Basic): add notation for `m×n`-Matrices Introduce the notation `Mat[m,n][R]` for `Matrix (Fin m) (Fin n) R`. [Zulip thread](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Why.20does.20.60Matrix.2Erow.60.20use.20.20.60Unit.60.20instead.20of.20.60Fin.201.60.3F/near/427949223) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 139/135 Mathlib/Algebra/Lie/CartanMatrix.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Basic.lean,Mathlib/Data/Matrix/Basic.lean,Mathlib/Data/Matrix/Notation.lean,Mathlib/Data/Matrix/Rank.lean,Mathlib/Data/Matrix/Reflection.lean,Mathlib/GroupTheory/Coxeter/Matrix.lean,Mathlib/LinearAlgebra/Matrix/Adjugate.lean,Mathlib/LinearAlgebra/Matrix/Charpoly/Coeff.lean,Mathlib/LinearAlgebra/Matrix/Determinant.lean,Mathlib/LinearAlgebra/Matrix/SpecialLinearGroup.lean,Mathlib/LinearAlgebra/Matrix/Trace.lean,Mathlib/LinearAlgebra/Matrix/Transvection.lean,Mathlib/LinearAlgebra/PID.lean,Mathlib/LinearAlgebra/Vandermonde.lean,Mathlib/NumberTheory/Modular.lean,Mathlib/NumberTheory/ModularForms/CongruenceSubgroups.lean,Mathlib/NumberTheory/ModularForms/SlashActions.lean,Mathlib/NumberTheory/ModularForms/SlashInvariantForms.lean,Mathlib/NumberTheory/RamificationInertia.lean,Mathlib/RingTheory/SimpleModule.lean,test/matrix.lean 22 9 ['YaelDillies', 'eric-wieser', 'grunweg', 'joneugster'] nobody
605-68323
1 year ago
724-58716
724 days ago
5-76679
5 days
12751 Command-Master
author:Command-Master
 feat: add lemmas for Nat/Bits, Nat/Bitwise and Nat/Size Remove `@[simp]` from `Nat.bit_false` and `Nat.bit_true`, as `bit0` and `bit1` are deprecated, and add some lemmas to `Bits`, `Bitwise` and `Size`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data new-contributor 66/7 Mathlib/Data/Nat/Bits.lean,Mathlib/Data/Nat/Bitwise.lean,Mathlib/Data/Nat/Multiplicity.lean,Mathlib/Data/Nat/Size.lean 4 26 ['Command-Master', 'Rida-Hamadani', 'Ruben-VandeVelde', 'YaelDillies', 'github-actions', 'jcommelin'] nobody
605-48287
1 year ago
640-54509
640 days ago
56-40668
56 days
15448 urkud
author:urkud
 chore(*): deprecate `Option.elim'` Use `Option.elim` instead. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author tech debt 54/50 Mathlib/Algebra/BigOperators/Option.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Algebra/MvPolynomial/Variables.lean,Mathlib/Analysis/BoxIntegral/Partition/Additive.lean,Mathlib/Analysis/BoxIntegral/Partition/Basic.lean,Mathlib/Analysis/BoxIntegral/Partition/Split.lean,Mathlib/Analysis/Calculus/LagrangeMultipliers.lean,Mathlib/CategoryTheory/Category/PartialFun.lean,Mathlib/Computability/TMToPartrec.lean,Mathlib/Data/Option/Defs.lean,Mathlib/LinearAlgebra/Basis.lean,Mathlib/Logic/Embedding/Set.lean,Mathlib/Logic/Equiv/Basic.lean,Mathlib/MeasureTheory/OuterMeasure/Induced.lean,Mathlib/NumberTheory/Dioph.lean,Mathlib/Topology/Compactness/Paracompact.lean,Mathlib/Topology/LocallyFinite.lean 17 12 ['Ruben-VandeVelde', 'YaelDillies', 'github-actions', 'grunweg', 'urkud'] nobody
605-37340
1 year ago
614-83502
614 days ago
7-18420
7 days
10350 Shamrock-Frost
author:Shamrock-Frost
 feat(Data/Setoid): add the operations of taking the equivalence class of an element and of saturating a set wrt an equivalence relation I'm open to suggestions about changing the name "saturate", someone on zulip rightly pointed out this is a very overloaded term in math. That said, I think it's unlikely to cause confusion and that there's only one reasonable interpretation in the context of setoids. --- - [x] depends on: #10347 - [x] depends on: #10348 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 169/3 Mathlib/Data/Setoid/Basic.lean,Mathlib/Data/Setoid/Partition.lean,Mathlib/Order/Closure.lean 3 1 ['leanprover-community-mathlib4-bot'] nobody
603-50561
1 year ago
722-42189
722 days ago
19-74546
19 days
13573 Shamrock-Frost
author:Shamrock-Frost
 feat: add multivariate polynomial modules Add a type synonym for multivariate polynomials with coefficients in a module. --- Multivariate polynomials with module coefficients are sort of silly, but they sometimes show up in commutative algebra (eg in the definition of a quasi regular sequence). Writing this code involved a lot of copy and pasting from `PolynomialModule` and `MvPolynomial`. The API is definitely lacking at this stage but it's a start. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 691/6 Mathlib.lean,Mathlib/Algebra/MvPolynomial/Module/Basic.lean,Mathlib/Algebra/MvPolynomial/Module/MvAEval.lean,Mathlib/Algebra/Polynomial/Module/Basic.lean 4 9 ['Shamrock-Frost', 'erdOne', 'github-actions'] nobody
603-50541
1 year ago
639-42909
639 days ago
39-72752
39 days
6517 MohanadAhmed
author:MohanadAhmed
 feat: discrete Fourier transform of a finite sequence # Discrete Fourier Transform (DFT) Matrix and DFT of a (finite) sequence This file defines the `dft` opertaion on a sequence (also a vecotr) and the DFT operation matrix ## Main definitions - `dft v`: given a sequence (v : (Fin n) → ℂ) we can transform it into a sequence (V : (Fin n) →ℂ) such that $$V [p] = ∑_{k = 0}^{N - 1} e^{-j*2πkp/n} v [k]$$ - `idft V` : given a sequence (V : (Fin n) → ℂ) we can transform it into a sequence (v : (Fin n) → ℂ) such that $$v [k] = \frac{1}{N}∑_{p = 0}^{n - 1} e^{j*2πkp/N} v [p]$$ - `dftMatrix n` : the dft matrix of dimensions $n \times n$ with the `k, p` entry equal to $$Wₙ[k, p] = e^{-j2πkp/n}$$ - `(dftMatrix n)⁻¹` : the idft matrix of dimensions $n \times n$ with the `k, p` entry equal to $$Wₙ[k, p] = (1/N) e^{j2πkp/n}$$ ## Main results - `dft v = (dftMatrix n) v` : the dft operation on a sequence is the same as the dft matrix applied to the vector - `idft V = (dftMatrix n)⁻¹ V` : the idft operation on a sequence is the same as the idft matrix applied to the vector - `dft (idft v) = dft ( idft v) = v` the dft and idft operations are inverses - `Wₙ = vandermonde (w)` : the dft matrix is vandermonde with `w` being the first row of the dft matrix - `circulant t = (dftMatrix n)⁻¹ ⬝ diagonal (dft t) ⬝ (dftMatrix n)` : a circulant matrix is diagonalizable by the dft and idft matrix pair. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 294/0 Mathlib.lean,Mathlib/LinearAlgebra/Matrix/DFT.lean 2 26 ['MohanadAhmed', 'ericrbg'] nobody
603-50379
1 year ago
912-74595
912 days ago
65-20427
65 days
13155 alreadydone
author:alreadydone
 feat(NumberTheory/EllipticDivisibilitySequence): show elliptic relations follow from even-odd recursion This PR is centered around the (generalized) elliptic relations (`rel₄`) $E(a,b,c,d): W_{a+b}W_{a-b}W_{c+d}W_{c-d}=W_{a+c}W_{a-c}W_{b+d}W_{b-d}-W_{a+d}W_{a-d}W_{b+c}W_{b-c}$. For an integer-indexed sequence W valued in a commutative ring, the relation makes sense only when a,b,c,d are all integers or all half integers. For convenience of formalization, we instead consider integers a,b,c,d of the same parity and divide all subscripts by 2. We extract the subexpression $W_{(a+b)/2}W_{(a-b)/2}$ (which appear six times) as `addMulSub W a b`. The collection of all $E(a,b,c,d)$ is equivalent to Stange's axiom for elliptic nets (`net`), and the literature (e.g. Silverman) commonly consider only the three-index special case $E(m,n,r,0)$ (`Rel₃`). Important special cases of these relations are (i) $E(m+1,m,1,0): W_{2m+1}W_1^3=W_{m+2}W_m^3-W_{m+1}^3 W_{m-1}$ (`oddRec`) and (ii) $E(m+1,m-1,1,0): W_{2m}W_2 W_1^2=W_m(W_{m+2}W_{m-1}^2-W_{m-2}W_{m+1}^2)$ (`evenRec`), which suffice to uniquely specify $W$ on all positive integers recursively from four initial values $W_1, W_2, W_3, W_4$ (`IsEllSequence.ext`, if $W_1 W_2$ is not a zero divisor). In the usual setting where $W_1=1$ and $W_2\mid W_4$, there does exist a sequence (`normEDS`) satisfying (i) and (ii) given initial values $W_2, W_3$ and $W_4/W_2$. It turns out the same non-zerodivisor condition also guarantees that W is an odd function with $W_0=0$, which naturally extends W to all integers. The main result of this PR (`rel₄_of_oddRec_evenRec`, `IsEllSequence.of_oddRec_evenRec`) is a purely algebraic proof that the sequence W defined by the single-parameter elliptic relations (i) and (ii) implies all $E(a,b,c,d)$, based on my original argument first published on [Math.SE](https://math.stackexchange.com/a/4903422/12932). It's based on the observation that a nonzerodivisor-multiple of $E(a,b,c,d)$ can be expressed as a linear combination of various $E(a,b,c_\min,d_\min)$ with the two smallest indices fixed at their minimal possible values, which can be transformed (`transf`) to an elliptic relation with smaller `a` (which can be assumed to hold by induction), unless they are of the form (i) or (ii) which hold by assumption. For this argument it's necessary to assume `a > b > c > d ≥ 0` (see `StrictAnti₄` and `Rel₄OfValid`), but it's easy to extend to arbitrary a,b,c,d by symmetry properties of `rel₄` under negation and permutations of indices. In the subsequent PR #13057, we show all normalized EDSs (`normEDS`), defined using the even-odd recursion (i)-(ii), are elliptic (i.e. satisfy the elliptic relations) divisibility sequences. This PR doesn't directly apply because a normEDS doesn't always satisfy the nonzerodivisor condition, but they are specializations of the universal normEDS, which does satisfy the condition. The technique of reducing to the universal case will be applied many times, and relies on the naturality (`map`) lemmas. We also change the `ℕ` in the definition `IsDivSequence` to `ℤ` which is more natural given that W is a `ℤ`-indexed sequence. --- - [x] depends on: #13153 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra awaiting-author t-number-theory
label:t-algebra$
 565/12 Mathlib/NumberTheory/EllipticDivisibilitySequence.lean 1 55 ['Multramate', 'alreadydone', 'github-actions', 'grunweg', 'leanprover-community-mathlib4-bot'] nobody
597-63983
1 year ago
646-65870
646 days ago
26-39367
26 days
15600 adomani
author:adomani
 feat: lint also `let` vs `have` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-linter 77/26 Mathlib/Tactic/Linter/HaveLetLinter.lean,test/HaveLetLinter.lean 2 1 ['github-actions'] nobody
596-32259
1 year ago
617-25957
617 days ago
0-8
8 seconds
16253 Shreyas4991
author:Shreyas4991
 feat: Basics of Discrete Fair Division in Mathlib This PR adds the basics of discrete fair division in mathlib. We include the definitions of allocations, valuations, properties of valuations, and the following notions : Envy-Freeness (EF), Envy-Freeness upto 1 good (EF1), and envy freeness upto any good (EFX). We also include the various implications between these notions. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP awaiting-author 144/0 Mathlib/GameTheory/FairDivision/Discrete/Basic.lean 1 9 ['Shreyas4991', 'eric-wieser', 'github-actions'] nobody
595-30172
1 year ago
595-34433
595 days ago
0-20853
5 hours
13970 adomani
author:adomani
 feat: a linter to flag unnecessary uses of `nolint simpNF` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-linter awaiting-author 230/0 Mathlib.lean,Mathlib/Analysis/CStarAlgebra/Basic.lean,Mathlib/Analysis/Quaternion.lean,Mathlib/CategoryTheory/Comma/Arrow.lean,Mathlib/CategoryTheory/Monoidal/End.lean,Mathlib/Data/NNRat/Defs.lean,Mathlib/Data/Rat/Defs.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Even.lean,Mathlib/LinearAlgebra/CliffordAlgebra/EvenEquiv.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter.lean,Mathlib/Tactic/Linter/UnnecessarySyntax.lean,test/UnnecessarySyntax.lean 13 4 ['adomani', 'github-actions', 'grunweg', 'leanprover-bot'] nobody
594-55473
1 year ago
unknown
0-0
0 seconds
15162 adomani
author:adomani
 feat: checkAsSorry linter A very preliminary version of the `checkAsSorry` linter. It flags declarations whose type is not equal to the 'asSorry'ed one. [Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Running.20Mathlib.20under.20.60set_option.20debug.2EbyAsSorry.60) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-linter 119/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/CheckAsSorry.lean,test/CheckAsSorry.lean 4 1 ['github-actions'] nobody
594-54461
1 year ago
unknown
0-0
0 seconds
15121 Eloitor
author:Eloitor
 feat: iff theorems for IsSplitEpi and IsSplitMono in opposite category --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-category-theory new-contributor 40/0 Mathlib/CategoryTheory/EpiMono.lean 1 3 ['github-actions', 'joelriou', 'mattrobball'] nobody
592-23122
1 year ago
623-68781
623 days ago
7-3203
7 days
15895 madvorak
author:madvorak
 feat(Computability/ContextFreeGrammar): mapping between two types of nonterminal symbols --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability WIP 172/0 Mathlib/Computability/ContextFreeGrammar.lean 1 43 ['YaelDillies', 'github-actions', 'madvorak'] nobody
591-39915
1 year ago
595-73424
595 days ago
1-43047
1 day
14038 adomani
author:adomani
 test/decl diff in lean dev --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 231/2 .github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build.yml.in,.github/workflows/build_fork.yml,.github/workflows/mk_build_yml.sh,Mathlib/Tactic/Eval.lean,scripts/decls_diff_hybrid.sh,scripts/list_decls.lean 8 3 ['github-actions'] nobody
590-47975
1 year ago
663-18094
663 days ago
0-8
8 seconds
14046 adomani
author:adomani
 test: diff of declarations in lean --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 231/2 .github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build.yml.in,.github/workflows/build_fork.yml,.github/workflows/mk_build_yml.sh,Mathlib/Tactic/Eval.lean,scripts/decls_diff_hybrid.sh,scripts/list_decls.lean 8 2 ['github-actions'] nobody
590-47975
1 year ago
unknown
0-0
0 seconds
12107 yuma-mizuno
author:yuma-mizuno
 feat(Mathlib/Tactic/Widget/StringDiagram): support 2-morphisms in bicategories --- - [x] depends on: #11080 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory t-meta 1158/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CategoryTheory/Coherence.lean,Mathlib/Tactic/Widget/StringDiagram.lean,scripts/noshake.json,test/StringDiagram.lean,widget/src/penrose/monoidal.dsl,widget/src/penrose/monoidal.sty 8 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
585-42719
1 year ago
unknown
0-0
0 seconds
15925 yuma-mizuno
author:yuma-mizuno
 feat(CategoryTheory/Monoida): proof producing coherence tactic --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory t-meta 5018/265 Mathlib.lean,Mathlib/CategoryTheory/Bicategory/Adjunction.lean,Mathlib/CategoryTheory/Bicategory/Kan/Adjunction.lean,Mathlib/CategoryTheory/Monoidal/Braided/Basic.lean,Mathlib/CategoryTheory/Monoidal/CoherenceLemmas.lean,Mathlib/CategoryTheory/Monoidal/Opposite.lean,Mathlib/CategoryTheory/Monoidal/Rigid/Basic.lean,Mathlib/CategoryTheory/Monoidal/Rigid/Braided.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CategoryTheory/BicategoricalComp.lean,Mathlib/Tactic/CategoryTheory/Bicategory/Normalize.lean,Mathlib/Tactic/CategoryTheory/Bicategory/PureCoherence.lean,Mathlib/Tactic/CategoryTheory/Coherence.lean,Mathlib/Tactic/CategoryTheory/Coherence/Basic.lean,Mathlib/Tactic/CategoryTheory/Coherence/Datatypes.lean,Mathlib/Tactic/CategoryTheory/Coherence/Normalize.lean,Mathlib/Tactic/CategoryTheory/Coherence/PureCoherence.lean,Mathlib/Tactic/CategoryTheory/CoherenceNew.lean,Mathlib/Tactic/CategoryTheory/Monoidal.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Basic.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Datatypes.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Normalize.lean,Mathlib/Tactic/CategoryTheory/Monoidal/PureCoherence.lean,Mathlib/Tactic/CategoryTheory/MonoidalComp.lean,Mathlib/Tactic/Widget/StringDiagram.lean,lake-manifest.json,scripts/noshake.json,test/CategoryTheory/Bicategory.lean,test/CategoryTheory/Coherence.lean,test/CategoryTheory/CoherenceNew.lean,test/CategoryTheory/Monoidal.lean,test/CategoryTheory/Monoidal/Basic.lean,test/CategoryTheory/Monoidal/Normalize.lean,test/CategoryTheory/MonoidalComp.lean,test/StringDiagram.lean 35 1 ['github-actions'] nobody
585-2856
1 year ago
unknown
0-0
0 seconds
7861 shuxuezhuyi
author:shuxuezhuyi
 feat(Geometry/Hyperbolic/UpperHalfPlane): instance IsometricSMul PSL(2, ℝ) ℍ --- - [ ] depends on: #7835 - [ ] depends on: #7791 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-euclidean-geometry 98/0 Mathlib.lean,Mathlib/Geometry/Hyperbolic/UpperHalfPlane/Basic.lean,Mathlib/LinearAlgebra/Matrix/ProjectiveSpecialLinearGroup.lean 3 1 ['leanprover-community-mathlib4-bot'] nobody
584-70316
1 year ago
645-24444
645 days ago
43-50453
43 days
16570 yuma-mizuno
author:yuma-mizuno
 chore(Tactic/CategoryTheory): change `TermElabM` to `MetaM` Separated from #15335. To use `Qq`, we need to modify `Qq` to support universe matching. See [Zulip](https://leanprover.zulipchat.com/#narrow/stream/144837-PR-reviews/topic/.2315335.20meta.20code.20for.20monoidal.20categories). --- - [ ] depends on: #15335 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-meta 26/15 Mathlib/Tactic/CategoryTheory/BicategoryCoherence.lean,Mathlib/Tactic/CategoryTheory/Coherence.lean 2 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mergify'] nobody
584-46781
1 year ago
unknown
0-0
0 seconds
6475 joneugster
author:joneugster
 refactor(LinearAlgebra/Span): replace ∙ with • as notation for `span R {x}` Change the notation for `Submodule.span R {x}` from `R ∙ x` to the bullet `R • x`, which is also used for scalar multiplication. --- (this was an experiment originating from a [Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/270676-lean4/topic/.2E.C2.B7.E2.AC.9D.20.5Brant.5D), I don't have a clear opinion if this is actually a desired thing to do...) Generally this works and Lean seems to do fine figuring out the difference between `r • x` and `R • x` (The former is scalar multiplication in an `R`-module `M`, the latter is the `Submodule R M` generated by `x`). Encountered a few regressions that should be considered (the first two might be also bugs that could be looked at independently): 1. `(· • ·)`, and general simple function syntax, does not work as notation for `HSMul.hSMul` anymore. For this reason, I introduced the notation `scoped` to minimise the effect of this. Now it's only a problem if you `open Span`. Note that `fun x₁ x₂ ↦ x₁ • x₂` works flawlessly all the time. 4. `change` and `convert` have troubles to deal with the two competing notations. `have := _; convert this` works. 5. `R • x - y` is not valid anymore and needs parentheses: `R • (x - y)`. I do think this actually helps readability, so I don't mind. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra RFC
label:t-algebra$
 323/240 Mathlib/Algebra/Algebra/Operations.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Lie/Engel.lean,Mathlib/Algebra/Lie/Normalizer.lean,Mathlib/Algebra/Module/PID.lean,Mathlib/Algebra/Module/Torsion.lean,Mathlib/Analysis/InnerProductSpace/Basic.lean,Mathlib/Analysis/InnerProductSpace/GramSchmidtOrtho.lean,Mathlib/Analysis/InnerProductSpace/Orthogonal.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Analysis/InnerProductSpace/Projection.lean,Mathlib/Analysis/InnerProductSpace/TwoDim.lean,Mathlib/Analysis/NormedSpace/ContinuousLinearMap.lean,Mathlib/Analysis/NormedSpace/HahnBanach/Extension.lean,Mathlib/Analysis/NormedSpace/OperatorNorm.lean,Mathlib/Data/ZMod/Quotient.lean,Mathlib/Geometry/Euclidean/Angle/Oriented/Basic.lean,Mathlib/Geometry/Euclidean/Inversion/Calculus.lean,Mathlib/Geometry/Euclidean/MongePoint.lean,Mathlib/Geometry/Euclidean/PerpBisector.lean,Mathlib/Geometry/Euclidean/Sphere/SecondInter.lean,Mathlib/Geometry/Manifold/Instances/Sphere.lean,Mathlib/LinearAlgebra/AffineSpace/AffineSubspace.lean,Mathlib/LinearAlgebra/AffineSpace/FiniteDimensional.lean,Mathlib/LinearAlgebra/BilinearForm.lean,Mathlib/LinearAlgebra/DFinsupp.lean,Mathlib/LinearAlgebra/Dimension.lean,Mathlib/LinearAlgebra/FiniteDimensional.lean,Mathlib/LinearAlgebra/LinearIndependent.lean,Mathlib/LinearAlgebra/LinearPMap.lean,Mathlib/LinearAlgebra/ProjectiveSpace/Basic.lean,Mathlib/LinearAlgebra/QuadraticForm/Basic.lean,Mathlib/LinearAlgebra/Quotient.lean,Mathlib/LinearAlgebra/SesquilinearForm.lean,Mathlib/LinearAlgebra/Span.lean,Mathlib/MeasureTheory/Integral/Periodic.lean,Mathlib/RingTheory/Coprime/Ideal.lean,Mathlib/RingTheory/Finiteness.lean,Mathlib/RingTheory/Ideal/AssociatedPrime.lean,Mathlib/RingTheory/Ideal/IdempotentFG.lean,Mathlib/RingTheory/Noetherian.lean,Mathlib/Topology/Instances/AddCircle.lean 42 3 ['eric-wieser', 'joneugster', 'leanprover-bot'] nobody
583-67612
1 year ago
977-62950
977 days ago
2-35869
2 days
10591 adri326
author:adri326
 feat(Topology/Algebra/ConstMulAction): properties of continuous actions in Hausdorff spaces Defines some useful properties of `ContinuousConstSMul` group actions on Hausdorff spaces: - `MulAction.isClosed_fixedBy`, which proves that the `fixedBy α m` set is closed - `t2_separation_smul`, which constructs an open set `s` such that `s` and `g • s` are disjoint - `Set.InjOn.t2_separation_smul`, the extension of `t2_separation_smul` to a set of group elements whose action is injective --- This PR belongs my series of PR around the formalization of Rubin's theorem. `MulAction.isClosed_fixedBy` is used in several places along the proof, and the separation lemmas are primarily used in showing that `(fixedBy α g)ᶜ` and `(fixedBy α h)ᶜ` are disjoint under some intricate but fully group-theoretic condition. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology awaiting-author t-algebra
label:t-algebra$
 57/0 Mathlib/Topology/Algebra/ConstMulAction.lean 1 9 ['ADedecker', 'adri326', 'j-loreaux', 'jcommelin'] ADedecker
assignee:ADedecker
583-38773
1 year ago
735-51515
735 days ago
55-82204
55 days
7545 shuxuezhuyi
author:shuxuezhuyi
 feat: APIs of `Function.extend f g e'` when `f` is injective We characterizes `range g`, `Injective g`, `Surjective g` and `Bijective g` in terms of `extend f g e'`.​ --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-logic 50/0 Mathlib.lean,Mathlib/Logic/Function/ApiForExtend.lean 2 1 ['fpvandoorn'] nobody
582-83148
1 year ago
891-30930
891 days ago
32-32325
32 days
16658 adomani
author:adomani
 add tips file --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP awaiting-author test-ci 51/508 .github/build.in.yml,.github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build_fork.yml,scripts/Tips.lean 5 1 ['github-actions'] nobody
579-25681
1 year ago
unknown
0-0
0 seconds
14078 Ruben-VandeVelde
author:Ruben-VandeVelde
 feat(CI): continue after mk_all fails --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author CI 43/0 .github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build.yml.in,.github/workflows/build_fork.yml,Mathlib/Data/Nat/Test.lean 5 2 ['bryangingechen', 'github-actions'] nobody
579-5981
1 year ago
661-58941
661 days ago
0-13311
3 hours
11283 hmonroe
author:hmonroe
 feat(ModelTheory/Satisfiability): define theory with independent sentence --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-logic 8/0 Mathlib/ModelTheory/Satisfiability.lean 1 2 ['fpvandoorn', 'hmonroe'] nobody
576-62935
1 year ago
763-36605
763 days ago
3-63452
3 days
16914 siddhartha-gadgil
author:siddhartha-gadgil
 Loogle syntax with non-reserved This is PR mainly to test that loogle syntax does not break stuff downstream --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 4/4 lake-manifest.json,lakefile.lean 2 1 ['github-actions'] nobody
574-51544
1 year ago
575-48633
575 days ago
0-14835
4 hours
13782 alreadydone
author:alreadydone
 feat(EllipticCurve): ZSMul formula in terms of division polynomials The formula $[n]P = (\phi_n(x,y) : \omega_n(x,y) : \psi_n(x,y))$ in Jacobian coordinates for $P=(x,y)$ a nonsingular point on a Weierstrass/elliptic curve. --- - [x] depends on: #12883 - [x] depends on: #13399 - [ ] depends on: #13057 - [ ] depends on: #13155 - [x] depends on: #13845 - [x] depends on: #13846 - [ ] depends on: #13847 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-number-theory blocked-by-other-PR merge-conflict t-algebraic-geometry
label:t-algebra$
 2462/232 Mathlib.lean,Mathlib/Algebra/MvPolynomial/PDeriv.lean,Mathlib/Algebra/Polynomial/Bivariate.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine.lean,Mathlib/AlgebraicGeometry/EllipticCurve/DivisionPolynomial/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/DivisionPolynomial/ZSMul.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Group.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Universal.lean,Mathlib/NumberTheory/EllipticDivisibilitySequence.lean 10 8 ['Multramate', 'alreadydone', 'github-actions', 'leanprover-community-mathlib4-bot'] nobody
572-14509
1 year ago
unknown
0-0
0 seconds
8118 iwilare
author:iwilare
 feat(CategoryTheory): add dinatural transformations A starting point to define [dinatural transformations](https://ncatlab.org/nlab/show/dinatural+transformation). This is my first PR so style comments and improvements are very welcome! --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory 147/7 Mathlib.lean,Mathlib/CategoryTheory/DinatTrans.lean,Mathlib/CategoryTheory/Functor/Category.lean,Mathlib/CategoryTheory/Products/Bifunctor.lean 4 49 ['Shamrock-Frost', 'github-actions', 'iwilare', 'joelriou'] Shamrock-Frost
assignee:Shamrock-Frost
569-73830
1 year ago
673-54307
673 days ago
21-30729
21 days
14242 js2357
author:js2357
 feat: Prove equivalence of `isDedekindDomain` and `isDedekindDomainDvr` Prove that `isDedekindDomainDvr` is equivalent to both `isDedekindDomain` and `isDedekindDomainInv`. Specifically, prove `isDedekindDomainDvr A → isDedekindDomainInv A`, because `isDedekindDomain A → isDedekindDomainDvr A` and `IsDedekindDomain A ↔ IsDedekindDomainInv A` are already in Mathlib. - [x] depends on: #14099 - [x] depends on: #14216 - [ ] depends on: #14237 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra blocked-by-other-PR new-contributor
label:t-algebra$
 269/1 Mathlib.lean,Mathlib/RingTheory/DedekindDomain/Dvr.lean,Mathlib/RingTheory/FractionalIdeal/LocalizedAtPrime.lean,Mathlib/RingTheory/Localization/Basic.lean 4 2 ['github-actions', 'leanprover-community-mathlib4-bot'] nobody
569-34181
1 year ago
657-23128
657 days ago
0-273
4 minutes
17171 astrainfinita
author:astrainfinita
 test extends carrier and property --- We need https://github.com/leanprover/lean4/issues/2666 ... [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 433/309 Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Directed.lean,Mathlib/Algebra/DirectSum/Decomposition.lean,Mathlib/Algebra/Field/Subfield.lean,Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/Algebra/Group/Subgroup/MulOpposite.lean,Mathlib/Algebra/Group/Submonoid/Basic.lean,Mathlib/Algebra/Group/Submonoid/MulOpposite.lean,Mathlib/Algebra/Group/Submonoid/Pointwise.lean,Mathlib/Algebra/Group/Submonoid/Units.lean,Mathlib/Algebra/Group/Subsemigroup/Basic.lean,Mathlib/Algebra/Group/Subsemigroup/Operations.lean,Mathlib/Algebra/Module/Submodule/Basic.lean,Mathlib/Algebra/Module/Submodule/Lattice.lean,Mathlib/Algebra/Module/Submodule/Map.lean,Mathlib/Algebra/Module/Submodule/Pointwise.lean,Mathlib/Algebra/Ring/Subring/Basic.lean,Mathlib/Algebra/Ring/Subsemiring/Basic.lean,Mathlib/Algebra/Ring/Subsemiring/MulOpposite.lean,Mathlib/Algebra/Ring/Subsemiring/Order.lean,Mathlib/Algebra/Star/Subalgebra.lean,Mathlib/Algebra/Star/Subsemiring.lean,Mathlib/Data/Complex/Module.lean,Mathlib/Data/SetLike/Basic.lean,Mathlib/Deprecated/Subfield.lean,Mathlib/Deprecated/Subgroup.lean,Mathlib/Deprecated/Submonoid.lean,Mathlib/Deprecated/Subring.lean,Mathlib/FieldTheory/IntermediateField/Basic.lean,Mathlib/GroupTheory/ArchimedeanDensely.lean,Mathlib/GroupTheory/DoubleCoset.lean,Mathlib/GroupTheory/Finiteness.lean,Mathlib/GroupTheory/GroupAction/SubMulAction.lean,Mathlib/LinearAlgebra/AffineSpace/AffineSubspace.lean,Mathlib/LinearAlgebra/Span.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/NonUnitalSubring/Basic.lean,Mathlib/RingTheory/NonUnitalSubsemiring/Basic.lean,Mathlib/SetTheory/Cardinal/Subfield.lean,Mathlib/Topology/Algebra/Algebra.lean,Mathlib/Topology/Algebra/OpenSubgroup.lean 42 1 ['github-actions'] nobody
565-32523
1 year ago
unknown
0-0
0 seconds
7516 ADedecker
author:ADedecker
 perf: use `abbrev` to prevent unifying useless data --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 4/3 Mathlib/Topology/ContinuousFunction/Bounded.lean 1 3 ['ADedecker', 'leanprover-bot', 'mattrobball'] nobody
564-4183
1 year ago
924-54800
924 days ago
0-16
16 seconds
17127 astrainfinita
author:astrainfinita
 chore: remove global `Quotient.mk` `⟦·⟧` notation --- Merge this PR when we are ready to migrate to `QuotLike` API (#16421). [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 137/2 Counterexamples/Pseudoelement.lean,Mathlib/Algebra/Associated/Basic.lean,Mathlib/Algebra/BigOperators/Group/Finset.lean,Mathlib/Algebra/Group/Conj.lean,Mathlib/Algebra/GroupWithZero/NonZeroDivisors.lean,Mathlib/Algebra/Order/CauSeq/Completion.lean,Mathlib/Algebra/Quandle.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Projective.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/Basic.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/FundamentalGroup.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/InducedMaps.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/Product.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/SimplyConnected.lean,Mathlib/CategoryTheory/Abelian/Pseudoelements.lean,Mathlib/CategoryTheory/Limits/Shapes/SingleObj.lean,Mathlib/CategoryTheory/Monoidal/Free/Basic.lean,Mathlib/CategoryTheory/Monoidal/Free/Coherence.lean,Mathlib/CategoryTheory/Skeletal.lean,Mathlib/Data/Finset/Card.lean,Mathlib/Data/Fintype/List.lean,Mathlib/Data/Fintype/Quotient.lean,Mathlib/Data/Multiset/Basic.lean,Mathlib/Data/QPF/Multivariate/Constructions/Fix.lean,Mathlib/Data/QPF/Univariate/Basic.lean,Mathlib/Data/Quot.lean,Mathlib/Data/Real/Basic.lean,Mathlib/Data/Set/Finite.lean,Mathlib/Data/Set/Image.lean,Mathlib/Data/Setoid/Basic.lean,Mathlib/GroupTheory/GroupAction/Basic.lean,Mathlib/GroupTheory/GroupAction/Quotient.lean,Mathlib/LinearAlgebra/Dual.lean,Mathlib/LinearAlgebra/Ray.lean,Mathlib/Logic/Encodable/Basic.lean,Mathlib/Logic/Equiv/Basic.lean,Mathlib/ModelTheory/DirectLimit.lean,Mathlib/ModelTheory/Fraisse.lean,Mathlib/ModelTheory/Quotients.lean,Mathlib/NumberTheory/NumberField/CanonicalEmbedding/FundamentalCone.lean,Mathlib/NumberTheory/NumberField/Embeddings.lean,Mathlib/NumberTheory/NumberField/Units/DirichletTheorem.lean,Mathlib/NumberTheory/Padics/PadicIntegers.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/Order/RelIso/Basic.lean,Mathlib/RepresentationTheory/Action/Concrete.lean,Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/Cardinal/Ordinal.lean,Mathlib/SetTheory/Game/Basic.lean,Mathlib/SetTheory/Game/Birthday.lean,Mathlib/SetTheory/Game/Impartial.lean,Mathlib/SetTheory/Game/Ordinal.lean,Mathlib/SetTheory/Game/State.lean,Mathlib/SetTheory/Lists.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/Basic.lean,Mathlib/SetTheory/Surreal/Basic.lean,Mathlib/SetTheory/Surreal/Dyadic.lean,Mathlib/SetTheory/Surreal/Multiplication.lean,Mathlib/SetTheory/ZFC/Basic.lean,Mathlib/SetTheory/ZFC/Rank.lean,Mathlib/Topology/Connected/PathConnected.lean,Mathlib/Topology/Homotopy/HomotopyGroup.lean,Mathlib/Topology/Homotopy/Path.lean,Mathlib/Topology/Homotopy/Product.lean,Mathlib/Topology/MetricSpace/GromovHausdorff.lean,Mathlib/Topology/UniformSpace/Separation.lean,test/interactiveUnfold.lean 68 1 ['github-actions'] nobody
563-85626
1 year ago
563-85626
563 days ago
4-72805
4 days
16887 metinersin
author:metinersin
 feat(ModelTheory/Complexity): define conjunctive and disjunctive formulas Defines `FirstOrder.Language.BoundedFormula.IsConjunctive` and `FirstOrder.Language.BoundedFormula.IsDisjunctive`. --- - [ ] depends on: #16885 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR new-contributor t-logic 300/7 Mathlib/ModelTheory/Complexity.lean,Mathlib/ModelTheory/Equivalence.lean,Mathlib/ModelTheory/Syntax.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
561-30159
1 year ago
576-58233
576 days ago
0-1299
21 minutes
16888 metinersin
author:metinersin
 feat(ModelTheory/Complexity): Define conjunctive and disjunctive normal forms Define `FirstOrder.Language.BoundedFormula.IsDNF` and `FirstOrder.Language.BoundedFormula.IsCNF`. --- - [ ] depends on: #16887 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR new-contributor t-logic 415/7 Mathlib/ModelTheory/Complexity.lean,Mathlib/ModelTheory/Equivalence.lean,Mathlib/ModelTheory/Syntax.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
561-30159
1 year ago
576-58234
576 days ago
0-1045
17 minutes
16889 metinersin
author:metinersin
 feat(ModelTheory/Complexity): Normal forms Defines `FirstOrder.Language.BoundedFormula.toDNF` and `FirstOrder.Language.BoundedFormula.toCNF` - given a quantifier-free formula, these construct a semantically equivalent formula in disjunctive normal form and conjunctive normal form, respectively. --- - [ ] depends on: #16888 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR new-contributor t-logic 525/7 Mathlib/ModelTheory/Complexity.lean,Mathlib/ModelTheory/Equivalence.lean,Mathlib/ModelTheory/Syntax.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
561-30158
1 year ago
576-53984
576 days ago
0-613
10 minutes
5995 astrainfinita
author:astrainfinita
 feat: add APIs about `Quotient.choice` Some docs in this PR refer to the definition in #5576. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author RFC t-data 76/6 Mathlib/Data/Quot.lean 1 3 ['YaelDillies', 'astrainfinita', 'gebner'] eric-wieser
assignee:eric-wieser
554-44368
1 year ago
679-65029
679 days ago
285-35716
285 days
14619 Command-Master
author:Command-Master
 chore: Merge `Trunc` to `Squash` Remove `Trunc` and use `Squash` instead --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP new-contributor 197/211 Mathlib/CategoryTheory/EpiMono.lean,Mathlib/CategoryTheory/Preadditive/Biproducts.lean,Mathlib/Data/DFinsupp/Basic.lean,Mathlib/Data/Fintype/Basic.lean,Mathlib/Data/Fintype/Card.lean,Mathlib/Data/Fintype/Option.lean,Mathlib/Data/Fintype/Perm.lean,Mathlib/Data/Fintype/Quotient.lean,Mathlib/Data/Quot.lean,Mathlib/Data/Semiquot.lean,Mathlib/GroupTheory/Perm/Cycle/Factors.lean,Mathlib/GroupTheory/Perm/Sign.lean,Mathlib/Logic/Equiv/List.lean 13 3 ['Command-Master', 'github-actions', 'vihdzp'] nobody
551-76709
1 year ago
unknown
0-0
0 seconds
13156 erdOne
author:erdOne
 refactor(Algebra/Module/LocalizedModule): Redefine `LocalizedModule` in terms of `OreLocalization`. --- - [x] depends on: #13151 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 519/628 Mathlib.lean,Mathlib/Algebra/Module/LocalizedModule.lean,Mathlib/AlgebraicGeometry/Modules/Tilde.lean,Mathlib/RingTheory/DedekindDomain/Different.lean,Mathlib/RingTheory/Localization/BaseChange.lean,Mathlib/RingTheory/OreLocalization/Basic.lean,Mathlib/RingTheory/OreLocalization/Module.lean,Mathlib/RingTheory/OreLocalization/Ring.lean 8 4 ['github-actions', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'mattrobball'] nobody
549-51508
1 year ago
552-49206
552 days ago
49-319
49 days
16348 urkud
author:urkud
 refactor(Topology): require `LinearOrder` with `OrderTopology` While the definition formally makes sense for a preorder, this topology is usually not the right one for a non-linear order (e.g., `Real × Real`). See [Zulip thread](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Open.20Ioi) --- This PR doesn't cleanup any API, I'm going to do it in a later PR. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-topology t-order 33/46 Mathlib/Analysis/Asymptotics/SuperpolynomialDecay.lean,Mathlib/Topology/Algebra/Order/LiminfLimsup.lean,Mathlib/Topology/Instances/Sign.lean,Mathlib/Topology/Order/Basic.lean,Mathlib/Topology/Order/Filter.lean,Mathlib/Topology/Order/MonotoneContinuity.lean 6 10 ['YaelDillies', 'github-actions', 'jcommelin', 'urkud'] nobody
549-51132
1 year ago
589-83466
589 days ago
3-83049
3 days
13965 pechersky
author:pechersky
 feat(Data/DigitExpansion): reals via digit expansion are complete --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [ ] depends on: #13964 merge-conflict blocked-by-other-PR t-data 3876/0 Mathlib.lean,Mathlib/Data/DigitExpansion/Add.lean,Mathlib/Data/DigitExpansion/Defs.lean,Mathlib/Data/DigitExpansion/Hensel.lean,Mathlib/Data/DigitExpansion/Integer/Basic.lean,Mathlib/Data/DigitExpansion/Integer/Mul.lean,Mathlib/Data/DigitExpansion/Real/Basic.lean,Mathlib/Data/DigitExpansion/Real/CompleteSpace.lean,Mathlib/Data/DigitExpansion/Real/ConditionallyComplete.lean,docs/references.bib 10 4 ['github-actions', 'leanprover-community-mathlib4-bot'] nobody
548-1900
1 year ago
666-34519
666 days ago
0-600
10 minutes
16984 hrmacbeth
author:hrmacbeth
 feat: extend `module` tactic to handle multiple rings, not strictly ordered by inclusion The `module` tactic currently in Mathlib handles scalars from multiple rings, but only if for any two rings `R` and `S` which appear, either `R` is an algebra over `S` or vice versa. This PR extends the tactic by providing a syntax `module T`, which will handle scalars from any ring `R` which `T` is an algebra over. For example, ```lean example : (2:ℤ) • x = (2:ℚ≥0) • x := by module ``` fails since `ℤ` is not a `ℚ≥0`-algebra and `ℚ≥0` is not a `ℤ`-algebra, but ```lean example : (2:ℤ) • x = (2:ℚ≥0) • x := by module ℚ ``` works since `ℚ` is both a `ℤ`-algebra and a `ℚ≥0`-algebra. This PR is a quick proof-of-concept implementation, just to record the desired approach and tactic syntax. It should not be merged as-is. It has with a lot of code duplication and should be rewritten more efficiently (for example, `parse` and `parseEnsuringType` should be merged to a single function, and the `some`/`none` cases in `matchScalarsAux` should be merged to a uniform treatment) before being considered for merging to Mathlib. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta 158/35 Mathlib/Tactic/Module.lean,test/module.lean 2 1 ['github-actions'] nobody
545-73572
1 year ago
unknown
0-0
0 seconds
10796 mcdoll
author:mcdoll
 feat(Tactic/Positivity): non-negativity of functions --- This makes the `Finset.sum` and `integral_nonneg` extensions even more useful. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-meta 27/0 Mathlib/Tactic/Positivity/Core.lean 1 1 ['YaelDillies'] nobody
543-70154
1 year ago
unknown
0-0
0 seconds
12750 Command-Master
author:Command-Master
 feat: define Gray code --- Define binary reflected gray code, both as a permutation of `Nat` and as a permutation of `BitVec n`, and prove some theorems about them. Additionally, remove `@[simp]` from `Nat.bit_false` and `Nat.bit_true`, as `bit0` and `bit1` are deprecated, and add some lemmas to `Bits`, `Bitwise` and `Size`. - [ ] depends on: #12751 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-data new-contributor merge-conflict awaiting-author 226/0 Mathlib.lean,Mathlib/Data/Nat/Bits.lean,Mathlib/Data/Nat/Bitwise.lean,Mathlib/Data/Nat/GrayCode.lean,Mathlib/Data/Nat/Size.lean 5 5 ['Rida-Hamadani', 'alreadydone', 'github-actions', 'grunweg', 'leanprover-community-mathlib4-bot'] nobody
543-52816
1 year ago
692-34914
692 days ago
16-49744
16 days
12414 adomani
author:adomani
 test: lint and unlint `·` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 64/14 Archive/Wiedijk100Theorems/CubingACube.lean,Mathlib/Algebra/Module/Submodule/Bilinear.lean,Mathlib/Tactic/Linter/Multigoal.lean,test/Multigoal.lean 4 4 ['adomani', 'github-actions', 'grunweg', 'leanprover-bot'] nobody
541-49357
1 year ago
unknown
0-0
0 seconds
16647 eric-wieser
author:eric-wieser
 feat: partitions of lists The length of this list is the bell numbers. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-combinatorics t-data 311/0 Mathlib.lean,Mathlib/Data/List/Partition.lean 2 1 ['github-actions'] nobody
538-69831
1 year ago
unknown
0-0
0 seconds
13514 madvorak
author:madvorak
 feat(Computability/ContextFreeGrammar): closure under union - [ ] depends on: #15895 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability blocked-by-other-PR 448/4 Mathlib/Computability/ContextFreeGrammar.lean 1 50 ['Rida-Hamadani', 'YaelDillies', 'github-actions', 'leanprover-community-mathlib4-bot', 'madvorak'] nobody
530-64144
1 year ago
608-38125
608 days ago
72-28417
72 days
5364 thorimur
author:thorimur
 feat: `wlog ... replacing` This allows hypotheses to be removed from the set of generalized hypotheses. E.g. `wlog h : P replacing h'` will remove `h'` from the hypotheses of the type of `this` and from the context of the goal that will suppose `h`. See [zulip](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/wlog.20.2E.2E.2E.20replacing.20.2E.2E.2E.3F). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta 125/18 Mathlib/Tactic/WLOG.lean,test/wlog.lean 2 2 ['thorimur', 'urkud'] nobody
529-10783
1 year ago
unknown
0-0
0 seconds
9654 urkud
author:urkud
 feat: add `@[mk_eq]` version of `@[mk_iff]` The new attribute generates theorems like ```lean List.chain_eq : @List.Chain = fun {α} R a a_1 => a_1 = [] ∨ ∃ b l, R a b ∧ List.Chain R b l ∧ a_1 = b :: l ``` and is useful to rewrite in a theorem that argues about the properties of an unapplied inductive predicate. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-meta 63/9 Mathlib/Lean/Meta.lean,Mathlib/Tactic/MkIffOfInductiveProp.lean,test/MkIffOfInductive.lean 3 6 ['Vierkantor', 'github-actions', 'urkud'] nobody
529-10537
1 year ago
800-60236
800 days ago
25-70825
25 days
16704 AntoineChambert-Loir
author:AntoineChambert-Loir
 feat(Mathlib.Data.Ordering.Dickson): Dickson orders Dickson orders are a particular class of well founded orders characterized by the fact that every nonempty set has finitely many minimal elements. They appear in the classical theory of Groebner bases because it is easier to prove that some sets are well founded using this property. WiP. In the `tfae` function, property 2 is exactly `Set.PartiallyWellOrderedOn`, so the PR should be rewritten so as to use that property (and not define `IsDickson`). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-order 324/0 Mathlib.lean,Mathlib/Data/Ordering/Dickson.lean,scripts/noshake.json 3 9 ['AntoineChambert-Loir', 'b-mehta', 'github-actions'] nobody
528-75494
1 year ago
579-64325
579 days ago
2-84515
2 days
16355 Ruben-VandeVelde
author:Ruben-VandeVelde
 feat: odd_{add,sub}_one --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra awaiting-author t-number-theory
label:t-algebra$
 12/0 Mathlib/Algebra/Ring/Int.lean,Mathlib/Algebra/Ring/Parity.lean 2 4 ['Ruben-VandeVelde', 'github-actions', 'urkud'] nobody
528-23291
1 year ago
593-11737
593 days ago
0-57608
16 hours
8638 alreadydone
author:alreadydone
 refactor: noncommutative tensor product Co-authored-by: Eric Wieser Co-authored-by: Jujian Zhang This draft PR currently only generalizes a single file TensorProduct.lean; it allows TensorProduct to be taken over a non-commutative ring. Most of the declarations in TensorProduct.lean are now generalized to the non-commutative setting, and very few are deleted (their commutative version will be restored in another file). Next plans: + Change the namespace in TensorProduct.lean from TensorProduct to NonCommTensorProduct, and remove the #aligns + I plan to use the same notation for the non-commutative and the commutative TensorProduct, and the user will need to `open scoped` different namespaces to use the one of their choice. + Start a new file TensorProduct/Comm.lean, copy the content of TensorProduct.lean on master into it, change the definition TensorProduct to be semi-reducibly defeq to NonCommTensorProduct (in order to support more instances or unify non-defeq instances that become prop-eq in the commutative setting, e.g. we've chosen the R-action on a tensor product over commutative R to come from the left factor, since the action from the right factor is the same), and reuse the NonComm constructions as much as possible. We then change all files that imports TensorProduct.lean to import TensorProduct/Comm.lean instead. Once we do that, mathlib would compile and this PR would be complete. We can gradually generalize other files about tensor products this way. In this PR: `TensorProduct.map` is now defined in terms of `lTensor` and `rTensor` rather than the other way around, which requires moving `lTensor` and `rTensor` up from their original location. The definition of `rid` also becomes more challenging and is moved down. An evident observation is that actions on the domain of AddMonoidHom / LinearMap is really natural in the context of tensor products and Hom-tensor adjunction (`TensorProduct.lift`), not the default actions on the codomain. For example, it allows us to write the "balanced biadditive monoid homs" in #8536 as simply `N →ₗ[R] M →+ P` (where the right R-action on M turns into the left action on `M →+ P`). For this reason, we disable the default instances `AddMonoidHom/LinearMap.module` at the beginning of the file and enable the `AddMonoidHom/LinearMap.domModule` instances instead. (The action on the codomain would be necessary for the non-commutative version of [TensorProduct.lTensorHomToHomLTensor](https://leanprover-community.github.io/mathlib4_docs/Mathlib/LinearAlgebra/TensorProduct.html#TensorProduct.lTensorHomToHomLTensor) (in the form of `P ⊗[R] (M →+ Q) →+ M →+ P ⊗[R] Q`), but I've deleted it for now.) We register actions on the left factor of a tensor product as the default instance, but we also talk about actions on the right factor (`attribute [local instance] rightModule`). The Tensor-Hom adjunction #8495 is now `uncurryEquiv` in this PR. #8519 is now included in this PR and #8584 is now called `lift` in this PR. `CharacterModule.homEquiv` in #8559 can be obtained by combining `liftEquiv` and `flipMop` in this PR (except for a mop). To refactor the commutative tensor product, we'd need to transfer many R^mop-action to R-action and R^mop-LinearMaps to R-LinearMaps, which can be achieved via `Module.compHom` and `LinearMap.restrictScalars` (requires `LinearMap.CompatibleSMul` instance) given `RingEquiv.toOpposite`. `LinearMap.characterfy` and `CharacterModule.cong` could be obtained from `LinearMap.compAddMonoidHom` in this PR. TODO: + Move delarations that belong to other files. + Change docstrings that are no longer accurate. + Fix some argument order to be more natural. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra
label:t-algebra$
 793/676 Mathlib/Algebra/Module/LinearMap.lean,Mathlib/GroupTheory/GroupAction/DomAct/Basic.lean,Mathlib/LinearAlgebra/TensorProduct.lean 3 6 ['alreadydone', 'eric-wieser', 'grhkm21', 'jjaassoonn'] nobody
527-49504
1 year ago
unknown
0-0
0 seconds
14598 Command-Master
author:Command-Master
 chore: add typeclasses to unify various `add_top`, `add_eq_top`, etc. Add the four typeclasses `IsTopAbsorbing`, `IsBotAbsorbing`, `NoTopSum`, `NoBotSum`, as additive equivalents for `MulZeroClass` and `NoZeroDivisors`. Add instances of these for `ENNReal`, `WithTop α`, `WithBot α`, `PUnit`, `EReal`, `PartENat`, `Measure`, `Interval` and `Filter`. Also split `Algebra/Order/AddGroupWithTop` to `Algebra/Order/Group/WithTop` and `Algebra/Order/Monoid/WithTop` --- Previous usages of lemmas with quantified names like `WithTop.add_top` have to be changed to just `add_top`. `add_lt_top` is `@[simp]`, in accordance with `ENNReal.add_lt_top` being `@[simp]`. This affects `WithTop.add_lt_top` which previously hadn't been `@[simp]`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra t-order new-contributor
label:t-algebra$
 264/195 Archive/Wiedijk100Theorems/BallotProblem.lean,Mathlib.lean,Mathlib/Algebra/Order/Group/WithTop.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/Interval/Basic.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Basic.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Defs.lean,Mathlib/Algebra/Order/Monoid/Unbundled/WithTop.lean,Mathlib/Algebra/Order/Monoid/WithTop.lean,Mathlib/Algebra/PUnitInstances/Order.lean,Mathlib/Algebra/Polynomial/Degree/Definitions.lean,Mathlib/Algebra/Polynomial/Monic.lean,Mathlib/Algebra/Tropical/Basic.lean,Mathlib/Analysis/Analytic/Meromorphic.lean,Mathlib/Analysis/Normed/Lp/ProdLp.lean,Mathlib/Analysis/NormedSpace/ENorm.lean,Mathlib/Analysis/SpecialFunctions/JapaneseBracket.lean,Mathlib/Analysis/SpecialFunctions/Log/ENNRealLog.lean,Mathlib/Data/ENNReal/Operations.lean,Mathlib/Data/ENat/Basic.lean,Mathlib/Data/Nat/PartENat.lean,Mathlib/Data/Nat/WithBot.lean,Mathlib/Data/Real/EReal.lean,Mathlib/LinearAlgebra/Lagrange.lean,Mathlib/MeasureTheory/Covering/Differentiation.lean,Mathlib/MeasureTheory/Decomposition/Lebesgue.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/CondexpL1.lean,Mathlib/MeasureTheory/Function/Jacobian.lean,Mathlib/MeasureTheory/Function/L1Space.lean,Mathlib/MeasureTheory/Function/L2Space.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Function/LpSeminorm/TriangleInequality.lean,Mathlib/MeasureTheory/Function/LpSpace.lean,Mathlib/MeasureTheory/Function/StronglyMeasurable/Basic.lean,Mathlib/MeasureTheory/Function/UniformIntegrable.lean,Mathlib/MeasureTheory/Integral/Bochner.lean,Mathlib/MeasureTheory/Integral/MeanInequalities.lean,Mathlib/MeasureTheory/Integral/SetIntegral.lean,Mathlib/MeasureTheory/Integral/VitaliCaratheodory.lean,Mathlib/MeasureTheory/Measure/Hausdorff.lean,Mathlib/MeasureTheory/Measure/Lebesgue/Basic.lean,Mathlib/MeasureTheory/Measure/LevyProkhorovMetric.lean,Mathlib/MeasureTheory/Measure/MeasureSpace.lean,Mathlib/MeasureTheory/Measure/MeasureSpaceDef.lean,Mathlib/MeasureTheory/Measure/Regular.lean,Mathlib/MeasureTheory/Measure/Typeclasses.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/Order/Filter/Pointwise.lean,Mathlib/Probability/Kernel/Defs.lean,Mathlib/Probability/Martingale/Convergence.lean,Mathlib/RingTheory/Multiplicity.lean,Mathlib/RingTheory/MvPowerSeries/NoZeroDivisors.lean,Mathlib/RingTheory/UniqueFactorizationDomain.lean,Mathlib/Topology/EMetricSpace/Defs.lean,Mathlib/Topology/MetricSpace/Bounded.lean,Mathlib/Topology/MetricSpace/HausdorffDistance.lean,Mathlib/Topology/MetricSpace/Lipschitz.lean 57 30 ['Command-Master', 'YaelDillies', 'github-actions'] nobody
526-81092
1 year ago
526-81092
526 days ago
7-45599
7 days
18636 adomani
author:adomani
 Test/latest import report dev This PR is a test accompanying #18631. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict CI 147/0 .github/workflows/latest_import.yml,lakefile.lean 2 1 ['github-actions'] nobody
525-68363
1 year ago
unknown
0-0
0 seconds
16885 metinersin
author:metinersin
 feat(ModelTheory/Complexity): define literals Defines `FirstOrder.Language.BoundedFormula.IsLiteral` and `FirstOrder.Language.BoundedFormula.simpleNot` - an auxiliary operation that takes the negation of a formula and does some simplification. --- - [x] depends on: #16800 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author new-contributor t-logic 148/5 Mathlib/ModelTheory/Complexity.lean,Mathlib/ModelTheory/Equivalence.lean,Mathlib/ModelTheory/Semantics.lean,Mathlib/ModelTheory/Syntax.lean 4 20 ['YaelDillies', 'awainverse', 'github-actions', 'mathlib4-dependent-issues-bot', 'metinersin'] nobody
524-37213
1 year ago
560-26525
560 days ago
0-19926
5 hours
18716 jjaassoonn
author:jjaassoonn
 feat(Algebra/Module/GradedModule): quotient and subgrading - [ ] depends on: #9820 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra blocked-by-other-PR awaiting-CI merge-conflict
label:t-algebra$
 997/191 Counterexamples/HomogeneousPrimeNotPrime.lean,Mathlib.lean,Mathlib/Algebra/Group/Subgroup/Defs.lean,Mathlib/Algebra/Module/GradedModule/Basic.lean,Mathlib/Algebra/Module/GradedModule/QuotientGrading.lean,Mathlib/Algebra/Module/GradedModule/Subgrading.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Topology.lean,Mathlib/RingTheory/GradedAlgebra/Homogeneous/Ideal.lean,Mathlib/RingTheory/GradedAlgebra/Homogeneous/Submodule.lean,Mathlib/RingTheory/GradedAlgebra/Quotient.lean,Mathlib/RingTheory/GradedAlgebra/Radical.lean,scripts/no_lints_prime_decls.txt 12 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
524-36844
1 year ago
unknown
0-0
0 seconds
9341 winstonyin
author:winstonyin
 feat: Naturality of integral curves Let `v` and `v'` be sections of the tangent bundle of manifolds `M` and `M'`, respectively, and let `f : M → M'` be a differentiable map. Then `f` maps integral curves of `v` to integral curves of `v'` if and only if `v` and `v'` are `f`-related. - [x] depends on: #8483 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-differential-geometry 45/0 Mathlib/Geometry/Manifold/IntegralCurve.lean,Mathlib/Topology/Algebra/Module/Basic.lean 2 9 ['github-actions', 'grunweg', 'leanprover-community-mathlib4-bot', 'winstonyin'] nobody
521-2636
1 year ago
828-59106
828 days ago
0-28222
7 hours
13248 hcWang942
author:hcWang942
 feat: basic concepts of auction theory ## Description Formalise some core concepts and results in auction theory: this includes definitions for first-price and second-price auctions, as well as several fundamental results and helping lemmas. This is the very first PR of the project formalizing core concepts and results in auction theory. Our group is working on more contributions on the formalization of game theory prefix. Co-authored-by: Ma Jiajun ## Reference Roughgarden, Tim. ***Twenty Lectures on Algorithmic Game Theory***. Cambridge University Press, 2020. [Link](https://www.cambridge.org/core/books/twenty-lectures-on-algorithmic-game-theory/A9D9427C8F43E7DAEF8C702755B6D72B) --- - [x] Will depend on #14163 once that PR is merged. The Fintype lemmas introduced by this PR have been added in that PR and will be removed from here once that PR gets merged ## Current plan for formalization of Game Theory The current plan for the formalizing of Game Theory include: #### 1. Auction Theory. 🎉 _(200+ lines, this PR)_ - Essential definitions of Sealed-bid auction, First-price auction and Second-price auction. - First-price auction has no dominant strategy. - Second-price auction has dominant strategy. (Second-price auction is DSIC) #### 2. Mechanism design & Myerson's Lemma. 🎉 (400+ lines, pending for modification to Mathlib Standard) - Mechanism design An allocation rule is implementable if there exists - Dominant Strategy Incentive Compatible (DSIC) payment rule - An allocation rule is monotone if for every bidder’s gain is nondecreasing w.r.t. her/his bid - Myerson's Lemma Implementable ⇔ Monotone In the above case, the DSIC payment rule is unique. #### 3. von Neumann‘s Minimax Theorem. 🎉 (800+ lines, pending for modification to Mathlib Standard) - Equilibrium in zero sum game - Formalization strategy: via Loomis’s theorem. #### 4. Nash Equilibrium. 🎉 (pending for modification to Mathlib Standard) #### 5. Brouwer fixed-point theorem. (Work in Progress) #### 6. More Mechanism design. (Planning) merge-conflict awaiting-author new-contributor t-logic 204/0 Mathlib.lean,Mathlib/GameTheory/Auction/Basic.lean,docs/references.bib 3 148 ['Shreyas4991', 'YaelDillies', 'eric-wieser', 'faenuccio', 'github-actions', 'grunweg', 'hcWang942', 'tb65536', 'urkud', 'vihdzp'] hcWang942
assignee:hcWang942
519-76045
1 year ago
533-62233
533 days ago
109-82807
109 days
17675 astrainfinita
author:astrainfinita
 perf: do not search algebraic hierarchy when searching `FunLike` hierarchy --- Unification is still very slow. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict slow-typeclass-synthesis t-algebra
label:t-algebra$
 144/4 Mathlib.lean,Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Algebra/NonUnitalHom.lean,Mathlib/Algebra/Algebra/Rat.lean,Mathlib/Algebra/Group/Equiv/Basic.lean,Mathlib/Algebra/GroupWithZero/Hom.lean,Mathlib/Algebra/Module/Equiv/Defs.lean,Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/Algebra/Order/Hom/Basic.lean,Mathlib/Algebra/Ring/CentroidHom.lean,Mathlib/Algebra/Ring/Equiv.lean,Mathlib/Algebra/Ring/Hom/Defs.lean,Mathlib/Algebra/Star/StarAlgHom.lean,Mathlib/Analysis/Normed/Algebra/Spectrum.lean,Mathlib/Analysis/Normed/Operator/LinearIsometry.lean,Mathlib/GroupTheory/GroupAction/Hom.lean,Mathlib/RingTheory/Bialgebra/Equiv.lean,Mathlib/RingTheory/Bialgebra/Hom.lean,Mathlib/RingTheory/Coalgebra/Equiv.lean,Mathlib/Topology/Algebra/Module/Basic.lean,Mathlib/Util/SetSynthOrder.lean,MathlibTest/TCSynth.lean,scripts/noshake.json 24 5 ['astrainfinita', 'github-actions', 'leanprover-bot'] nobody
519-51178
1 year ago
unknown
0-0
0 seconds
9344 erdOne
author:erdOne
 feat: Add `AddGroup.FG` -> `Module.Finite ℤ` as instances --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 4/0 Mathlib/RingTheory/Finiteness.lean 1 4 ['alreadydone', 'erdOne', 'leanprover-bot'] nobody
518-60438
1 year ago
817-60881
817 days ago
21-27905
21 days
12133 ADedecker
author:ADedecker
 feat: generalize instIsLowerProd to arbitrary products Also change a bit the proof of the product case to match my own taste, feel free to tell if you prefer the old one. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-topology t-order 34/14 Mathlib/Topology/Constructions.lean,Mathlib/Topology/Order/LowerUpperTopology.lean 2 13 ['Ruben-VandeVelde', 'TwoFX', 'github-actions', 'jcommelin', 'mans0954', 'mathlib-bors', 'riccardobrasca'] nobody
517-70192
1 year ago
668-65828
668 days ago
63-69226
63 days
16637 astrainfinita
author:astrainfinita
 perf: reorder `extends` of `(Add)Monoid` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra
label:t-algebra$
 46/51 Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/BigOperators/Ring/List.lean,Mathlib/Algebra/GCDMonoid/Basic.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Ext.lean,Mathlib/Algebra/Group/Opposite.lean,Mathlib/Algebra/Group/Prod.lean,Mathlib/Algebra/Order/Group/Unbundled/Abs.lean,Mathlib/Algebra/Polynomial/Roots.lean,Mathlib/Algebra/Ring/SumsOfSquares.lean,Mathlib/CategoryTheory/Preadditive/FunctorCategory.lean,Mathlib/Data/Finset/NoncommProd.lean,Mathlib/GroupTheory/Congruence/Defs.lean,Mathlib/GroupTheory/Torsion.lean,Mathlib/LinearAlgebra/LinearPMap.lean,Mathlib/LinearAlgebra/TensorProduct/Basic.lean,Mathlib/Order/Filter/Germ/Basic.lean,Mathlib/RingTheory/Bialgebra/Hom.lean,Mathlib/RingTheory/Coalgebra/Hom.lean,Mathlib/RingTheory/TensorProduct/MvPolynomial.lean 20 3 ['astrainfinita', 'github-actions', 'leanprover-bot'] nobody
517-69430
1 year ago
582-76786
582 days ago
1-49655
1 day
18765 astrainfinita
author:astrainfinita
 chore: changing `outParam` of `MulActionSemiHomClass` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 60/34 Mathlib/Algebra/Algebra/NonUnitalHom.lean,Mathlib/Algebra/Category/ModuleCat/Limits.lean,Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/GroupTheory/GroupAction/Hom.lean 4 4 ['astrainfinita', 'github-actions', 'leanprover-bot'] nobody
517-25691
1 year ago
unknown
0-0
0 seconds
15822 kmill
author:kmill
 feat: greedy colorings of finite graphs Proves that the greedy coloring only takes `G.maxDegree + 1` colors. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-combinatorics 159/0 Mathlib/Combinatorics/SimpleGraph/ConcreteColorings.lean 1 1 ['github-actions'] nobody
514-50884
1 year ago
unknown
0-0
0 seconds
8661 joelriou
author:joelriou
 feat(CategoryTheory/Sites): descent of sheaves In this PR, it is shown that the category of sheaves on a site `(C, J)` identifies as a full subcategory of a category of families of sheaves equipped with a descent data (for a family of objects which cover the final object). Under suitable conditions, it shall be shown that this is an equivalence of categories (TODO). --- This shall be split in small PRs later. - [x] depends on: #8622 - [x] depends on: #8632 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-category-theory 1396/26 Mathlib.lean,Mathlib/CategoryTheory/Over.lean,Mathlib/CategoryTheory/Sites/CoverPreserving.lean,Mathlib/CategoryTheory/Sites/Descent.lean,Mathlib/CategoryTheory/Sites/EqualizerSheafCondition.lean,Mathlib/CategoryTheory/Sites/InducedTopology.lean,Mathlib/CategoryTheory/Sites/ObjectsCoverTop.lean,Mathlib/CategoryTheory/Sites/Over.lean,Mathlib/CategoryTheory/Sites/SheafHom.lean,Mathlib/CategoryTheory/Sites/Sieves.lean 10 3 ['github-actions', 'leanprover-community-mathlib4-bot'] nobody
514-46412
1 year ago
unknown
0-0
0 seconds
19055 JLimperg
author:JLimperg
 Test precompilation (batteries + aesop) again merge-conflict 9/8 lake-manifest.json,lakefile.lean 2 5 ['JLimperg', 'github-actions', 'leanprover-bot'] nobody
514-28055
1 year ago
unknown
0-0
0 seconds
10476 shuxuezhuyi
author:shuxuezhuyi
 feat(Topology/UniformSpace): define uniform preordered space We define the semi-uniform structure and the uniform preordered space. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-topology 94/0 Mathlib.lean,Mathlib/Topology/UniformSpace/UniformOrder.lean,docs/references.bib 3 2 ['shuxuezhuyi'] nobody
513-33066
1 year ago
741-60494
741 days ago
52-19273
52 days
17593 astrainfinita
author:astrainfinita
 chore(Algebra/Order/GroupWithZero/Unbundled): deprecate useless lemmas, use `ZeroLEOneClass` There are still some useless lemmas that were simply ported from `Algebra.Order.Monoid.Lemmas`, such as just chain an existing lemma with an assumption and lemmas whose assumptions imply `1 ≤ 0`. This PR removes them. Also, some lemmas have both assumptions like `1 < a` `0 < a`. This PR uses `ZeroLEOneClass` to remove redundant assumptions. --- - [ ] depends on: #17623 Ported from https://github.com/leanprover-community/mathlib/pull/16525 and https://github.com/leanprover-community/mathlib/pull/18158 Adapted from #9250. This version is easier to review. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra blocked-by-other-PR t-order
label:t-algebra$
 188/48 Archive/Wiedijk100Theorems/BuffonsNeedle.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/GroupWithZero/Unbundled.lean,Mathlib/Combinatorics/SimpleGraph/Triangle/Counting.lean,Mathlib/RingTheory/DedekindDomain/FiniteAdeleRing.lean,Mathlib/Topology/Algebra/Order/Field.lean 6 4 ['astrainfinita', 'github-actions', 'mathlib4-dependent-issues-bot', 'vihdzp'] nobody
512-56408
1 year ago
553-41989
553 days ago
0-74903
20 hours
17623 astrainfinita
author:astrainfinita
 feat(Algebra/Order/GroupWithZero/Unbundled): add some lemmas Some lemmas in `Algebra.Order.GroupWithZero.Unbundled` have incorrect or unsatisfactory names, or assumptions that can be omitted using `ZeroLEOneClass`. The lemmas added in this PR are versions of existing lemmas that use the correct or better name or `ZeroLEOneClass` to omit an assumption. The original lemmas will be deprecated in #17593. | New name | Old name | |-------------------------|-------------------------| | `mul_le_one_left₀` | `Left.mul_le_one_of_le_of_le` | | `mul_lt_one_of_le_of_lt_left₀` (`0 ≤ ·` version) / `mul_lt_one_of_le_of_lt_of_pos_left` | `Left.mul_lt_of_le_of_lt_one_of_pos` | | `mul_lt_one_of_lt_of_le_left₀` | `Left.mul_lt_of_lt_of_le_one_of_nonneg` | | `mul_le_one_right₀` | `Right.mul_le_one_of_le_of_le` | | `mul_lt_one_of_lt_of_le_right₀` (`0 ≤ ·` version) / `mul_lt_one_of_lt_of_le_of_pos_right` | `Right.mul_lt_one_of_lt_of_le_of_pos` | | `mul_lt_one_of_le_of_lt_right₀` | `Right.mul_lt_one_of_le_of_lt_of_nonneg` | The following lemmas use `ZeroLEOneClass`. | New name | Old name | |-------------------------|-------------------------| | `(Left.)one_le_mul₀` | `Left.one_le_mul_of_le_of_le` | | `Left.one_lt_mul_of_le_of_lt₀` | `Left.one_lt_mul_of_le_of_lt_of_pos` | | `Left.one_lt_mul_of_lt_of_le₀` | `Left.lt_mul_of_lt_of_one_le_of_nonneg` / `one_lt_mul_of_lt_of_le` (still there) | | `(Left.)one_lt_mul₀` | | | `Right.one_le_mul₀` | `Right.one_le_mul_of_le_of_le` | | `Right.one_lt_mul_of_lt_of_le₀` | `Right.one_lt_mul_of_lt_of_le_of_pos` | | `Right.one_lt_mul_of_le_of_lt₀` | `Right.one_lt_mul_of_le_of_lt_of_nonneg` / `one_lt_mul_of_le_of_lt` (still there) / `one_lt_mul` (still there) | | `Right.one_lt_mul₀` | `Right.one_lt_mul_of_lt_of_lt` | --- Split from #17593. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra awaiting-zulip t-order
label:t-algebra$
 146/44 Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/GroupWithZero/Unbundled.lean 2 11 ['YaelDillies', 'astrainfinita', 'github-actions', 'j-loreaux'] nobody
512-56408
1 year ago
519-48967
519 days ago
33-53295
33 days
18969 alreadydone
author:alreadydone
 chore: generalize Module to NonUnitalSemiring --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra
label:t-algebra$
 94/75 Mathlib/Algebra/Category/ModuleCat/Presheaf.lean,Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/Group/Action/End.lean,Mathlib/Algebra/Group/Action/Prod.lean,Mathlib/Algebra/Group/Action/TypeTags.lean,Mathlib/Algebra/GroupWithZero/Action/Defs.lean,Mathlib/Algebra/Module/Defs.lean,Mathlib/Algebra/Module/Submodule/Defs.lean,Mathlib/Algebra/Polynomial/Div.lean,Mathlib/Algebra/Polynomial/Laurent.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Group.lean,Mathlib/AlgebraicGeometry/Limits.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Scheme.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Order.lean,Mathlib/Analysis/Distribution/SchwartzSpace.lean,Mathlib/Geometry/Manifold/Instances/Sphere.lean,Mathlib/GroupTheory/CoprodI.lean,Mathlib/LinearAlgebra/FreeModule/IdealQuotient.lean,Mathlib/LinearAlgebra/LinearDisjoint.lean,Mathlib/LinearAlgebra/Matrix/SesquilinearForm.lean,Mathlib/LinearAlgebra/TensorProduct/Submodule.lean,Mathlib/RingTheory/Filtration.lean,Mathlib/RingTheory/Flat/FaithfullyFlat.lean,Mathlib/RingTheory/Ideal/Cotangent.lean,Mathlib/RingTheory/Ideal/Defs.lean,Mathlib/RingTheory/Ideal/Lattice.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/Ideal/Prod.lean,Mathlib/RingTheory/Presentation.lean,Mathlib/RingTheory/Smooth/Kaehler.lean,Mathlib/RingTheory/TensorProduct/MvPolynomial.lean 31 11 ['alreadydone', 'eric-wieser', 'github-actions', 'leanprover-bot'] nobody
510-80060
1 year ago
unknown
0-0
0 seconds
17624 astrainfinita
author:astrainfinita
 feat(Algebra/Order/GroupWithZero/Unbundled): generalize lemmas --- - [ ] depends on: #17623 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra blocked-by-other-PR t-order
label:t-algebra$
 121/26 Mathlib/Algebra/Order/GroupWithZero/Unbundled.lean 1 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
509-7180
1 year ago
553-40859
553 days ago
0-465
7 minutes
17513 astrainfinita
author:astrainfinita
 perf: do not search algebraic hierarchies when using `map_*` lemmas --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra awaiting-bench
label:t-algebra$
 5/3 Mathlib/Algebra/Group/Hom/Defs.lean,Mathlib/GroupTheory/GroupAction/Hom.lean 2 10 ['astrainfinita', 'github-actions', 'grunweg', 'leanprover-bot'] nobody
507-52602
1 year ago
551-54467
551 days ago
4-72589
4 days
17515 astrainfinita
author:astrainfinita
 perf: do not need `simp low` now --- - [ ] depends on: #17513 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra blocked-by-other-PR
label:t-algebra$
 12/10 Mathlib/Algebra/Group/Hom/Defs.lean,Mathlib/Analysis/SpecialFunctions/Bernstein.lean,Mathlib/GroupTheory/GroupAction/Hom.lean,Mathlib/NumberTheory/LucasLehmer.lean 4 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
507-52601
1 year ago
556-40113
556 days ago
0-380
6 minutes
19212 Julian
author:Julian
 feat(LinearAlgebra): add a variable_alias for VectorSpace Taken directly from the variable_alias docs. Zulip: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/why.20.5Bvariable_alias.5D.20attribute.20is.20not.20used.20in.20Mathlib.3F --- This is the first actual variable alias added to mathlib. I haven't reviewed variable_alias fully, but it seems like there's at least 3 ways they could be distributed in Mathlib: * alongside whatever subfolder they "belong to" (which is what I've tentatively done here) * In a file called `Aliases` somewhere near the thing they alias (which seems less discoverable to me) * In a single file, a la `Mathlib.TrainingWheels` (with some less playful name) which is meant to define a bunch of more "friendly" aliases all in one place. I kind of like the idea of the third thing as a future module but perhaps it can be synthesized if/when there are more aliases? For now as I say I've done the first one, but please let me know if someone prefers something else. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 25/0 Mathlib.lean,Mathlib/LinearAlgebra/VectorSpace.lean,scripts/noshake.json 3 10 ['Julian', 'PieterCuijpers', 'github-actions', 'urkud'] nobody
506-57847
1 year ago
506-57847
506 days ago
7-68089
7 days
19337 zeramorphic
author:zeramorphic
 feat(Data/Finsupp): generalise `Finsupp` to any "zero" value Remove the explicit dependence of `Finsupp` on `[Zero M]`, instead defining `Finsupp'` (better name pending) to be functions that are equal to a fixed value `z : M` cofinitely often. This PR is intended to do the initial work of replacing the definition of `Finsupp` with an instantiation of the more general definition, without adding any appropriate API. If accepted, the API development will follow in later PRs. Issues to consider: - Naming of `Finsupp'.` - Where should `Finsupp'` lemmas go? Do they need their own file/folder under `Data/`? Relevant Zulip threads: - https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Finsupp.20generalisations - https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Finsupp-like.20partial.20function Comments are welcome. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 203/83 Archive/Wiedijk100Theorems/Partition.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/MvPolynomial/Rename.lean,Mathlib/Algebra/MvPolynomial/Variables.lean,Mathlib/Algebra/Polynomial/Basic.lean,Mathlib/Algebra/Polynomial/Laurent.lean,Mathlib/Data/Finsupp/BigOperators.lean,Mathlib/Data/Finsupp/Defs.lean,Mathlib/Data/Finsupp/Order.lean,Mathlib/Data/Nat/Choose/Multinomial.lean,Mathlib/RingTheory/MvPolynomial/Symmetric/Defs.lean,Mathlib/RingTheory/PowerBasis.lean,scripts/nolints_prime_decls.txt 13 5 ['github-actions', 'vihdzp', 'zeramorphic'] nobody
504-33924
1 year ago
504-33924
504 days ago
3-72207
3 days
18756 astrainfinita
author:astrainfinita
 refactor: deprecate `DistribMulActionSemiHomClass` `MulSemiringActionSemiHomClass` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 50/28 Mathlib/Algebra/Algebra/NonUnitalHom.lean,Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/GroupTheory/GroupAction/Hom.lean 3 4 ['astrainfinita', 'github-actions', 'leanprover-bot'] nobody
492-85993
1 year ago
492-85993
492 days ago
31-53021
31 days
19125 yhtq
author:yhtq
 feat: add theorems to transfer `IsGalois` between pairs of fraction rings feat: add theorems to transfer `IsGalois` between pairs of fraction rings. - [x] depends on: #18404 - [x] depends on: #19124 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra new-contributor
label:t-algebra$
 121/0 Mathlib.lean,Mathlib/FieldTheory/Galois/IsFractionRing.lean,Mathlib/RingTheory/Localization/FractionRing.lean 3 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'tb65536'] nobody
490-12062
1 year ago
516-59844
516 days ago
0-1980
33 minutes
18841 hrmacbeth
author:hrmacbeth
 chore: change some `linarith`s to `linear_combination`s Change 100 `linarith`s to `linear_combination`s; this is generally a slight speedup. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #18714 (not strictly blocked by this, but the speed comparison will be more informative after it) merge-conflict WIP 106/107 Archive/Imo/Imo1959Q2.lean,Archive/Imo/Imo1988Q6.lean,Archive/Imo/Imo2005Q3.lean,Archive/Imo/Imo2008Q2.lean,Archive/Imo/Imo2008Q3.lean,Archive/Imo/Imo2013Q5.lean,Archive/Imo/Imo2021Q1.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/Analytic/Inverse.lean,Mathlib/Analysis/Calculus/BumpFunction/FiniteDimension.lean,Mathlib/Analysis/Complex/AbelLimit.lean,Mathlib/Analysis/Convex/Gauge.lean,Mathlib/Analysis/Convex/Slope.lean,Mathlib/Analysis/Convex/SpecificFunctions/Basic.lean,Mathlib/Analysis/Convex/Uniform.lean,Mathlib/Analysis/Convex/Visible.lean,Mathlib/Analysis/FunctionalSpaces/SobolevInequality.lean,Mathlib/Analysis/Normed/Module/FiniteDimension.lean,Mathlib/Analysis/PSeries.lean,Mathlib/Analysis/SpecialFunctions/Gamma/BohrMollerup.lean,Mathlib/Analysis/SpecialFunctions/Log/Basic.lean,Mathlib/Analysis/SpecialFunctions/Log/Monotone.lean,Mathlib/Analysis/SpecialFunctions/Pow/Deriv.lean,Mathlib/Analysis/SpecialFunctions/Pow/Real.lean,Mathlib/Analysis/SpecificLimits/FloorPow.lean,Mathlib/MeasureTheory/Covering/BesicovitchVectorSpace.lean,Mathlib/MeasureTheory/Measure/Lebesgue/VolumeOfBalls.lean,Mathlib/NumberTheory/Modular.lean,Mathlib/NumberTheory/Transcendental/Liouville/LiouvilleWith.lean,Mathlib/Probability/Distributions/Pareto.lean 30 29 ['github-actions', 'grunweg', 'hrmacbeth', 'jcommelin', 'leanprover-bot', 'mathlib4-dependent-issues-bot'] nobody
488-59388
1 year ago
510-81634
510 days ago
3-28253
3 days
11142 hmonroe
author:hmonroe
 feat(ProofTheory): Define logical symbols abstractly; opens new top-level section, drawing from lean4-logic --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-logic 468/1 Mathlib.lean,Mathlib/Data/Fin/VecNotation.lean,Mathlib/ProofTheory/LogicSymbol.lean 3 19 ['PatrickMassot', 'YaelDillies', 'avigad', 'fpvandoorn', 'github-actions'] nobody
482-69208
1 year ago
679-42857
679 days ago
94-3235
94 days
11210 hmonroe
author:hmonroe
 Test commit --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 1950/1 Mathlib.lean,Mathlib/Data/Fin/VecNotation.lean,Mathlib/ProofTheory/Calculus.lean,Mathlib/ProofTheory/FirstOrder/Arith/Language.lean,Mathlib/ProofTheory/FirstOrder/Basic/Syntax/Term.lean,Mathlib/ProofTheory/LogicSymbol.lean,Mathlib/ProofTheory/Matrix.lean,Mathlib/ProofTheory/Semantics.lean,Mathlib/ProofTheory/System.lean,docs/references.bib 10 100 ['github-actions'] nobody
482-69207
1 year ago
768-58688
768 days ago
2-67901
2 days
19621 Command-Master
author:Command-Master
 feat: Multiplicity and prime-adic valuation of derivations --- - [ ] depends on: #19596 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra blocked-by-other-PR large-import
label:t-algebra$
 397/13 Mathlib.lean,Mathlib/Algebra/Order/AddGroupWithTop.lean,Mathlib/Algebra/Order/Monoid/Unbundled/WithTop.lean,Mathlib/Data/ENat/Basic.lean,Mathlib/Order/WithBot.lean,Mathlib/RingTheory/Derivation/Multiplicity.lean,Mathlib/RingTheory/DiscreteValuationRing/Basic.lean,Mathlib/RingTheory/Valuation/Basic.lean,Mathlib/RingTheory/Valuation/PrimeMultiplicity.lean 9 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
482-51468
1 year ago
502-77113
502 days ago
0-370
6 minutes
18262 joelriou
author:joelriou
 feat(Algebra/Category/ModuleCat/Presheaf): exterior powers of presheaves of modules --- - [x] depends on: #18261 - [ ] depends on: #18236 - [ ] depends on: #18197 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra blocked-by-other-PR t-category-theory merge-conflict
label:t-algebra$
 874/0 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/ExteriorPower.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/ExteriorPower.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/FunctorOfNatTrans.lean,Mathlib/Algebra/Category/ModuleCat/Pseudofunctor.lean 6 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
482-42763
1 year ago
unknown
0-0
0 seconds
18294 astrainfinita
author:astrainfinita
 perf: make `Mul.toSMul` higher priority --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-bench t-algebra
label:t-algebra$
 2/5 Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/Order/Field/Pointwise.lean,Mathlib/Combinatorics/Additive/AP/Three/Defs.lean,Mathlib/Topology/Algebra/Module/WeakBilin.lean 4 4 ['astrainfinita', 'github-actions', 'leanprover-bot'] nobody
477-50400
1 year ago
unknown
0-0
0 seconds
15269 kkytola
author:kkytola
 feat: Add ENNReal.floor A right-continuous floor function on `ENNReal`. --- - [x] depends on: #13938 - [ ] depends on: #15773 (general type class for `ENat`-valued floor functions) - [x] depends on: #15380 (topology on `ENat` is needed to state right continuity of the floor function) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra blocked-by-other-PR t-order merge-conflict awaiting-author
label:t-algebra$
 445/0 Mathlib.lean,Mathlib/Algebra/Order/EFloor.lean,Mathlib/Data/ENNReal/Floor.lean,Mathlib/Data/Nat/Lattice.lean 4 18 ['YaelDillies', 'github-actions', 'kkytola', 'leanprover-community-mathlib4-bot', 'urkud'] nobody
469-23697
1 year ago
618-18763
618 days ago
0-3440
57 minutes
15773 kkytola
author:kkytola
 feat: Add type class for ENat-valued floor functions This PR adds a type class for extended natural number -valued floor functions. This is split off from #15269, where the suggestions were to make the floor function on ENNReal ENat-valued and to have an API mimicling FloorSemirings. Besides ENNReal, at least ENNRat would naturally satisfy the general type class. --- Two things are worth noting: * To fully mimic `FloorSemiring` API, also ceiling functions need to be added. The plan is to do that in a later PR. * The PR introduces the class `CastNatENatClass` to ensure that `natCast` and a coercion from `ENat` behave in the natural and order-respecing manner. This feels a little ad hoc, but such assumptions are needed for general `ENat`-valued floor functions to behave well. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-order 231/0 Mathlib.lean,Mathlib/Algebra/Order/EFloor.lean,Mathlib/Data/ENat/Basic.lean 3 5 ['YaelDillies', 'github-actions', 'kkytola', 'urkud'] nobody
469-23574
1 year ago
545-22927
545 days ago
66-24436
66 days
3251 kmill
author:kmill
 feat: deriving `LinearOrder` for simple enough inductive types Uses the same machinery underlying the `Fintype` derive handler to derive a lexicographical `LinearOrder` for non-recursive inductive types that have no indices. In principle more complicated types can have `LinearOrder`s, but that would require a more sophisticated implementation. --- - [x] depends on: #3198 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP awaiting-author t-meta 82/0 Mathlib.lean,Mathlib/Tactic/DeriveLinearOrder.lean 2 5 ['ChrisHughes24', 'kim-em', 'kmill', 'vihdzp'] nobody
466-84627
1 year ago
1093-258
1093 days ago
1-80343
1 day
3610 TimothyGu
author:TimothyGu
 feat: derive Infinite automatically for inductive types Deals with recursive types, but not mutually recursive types or types with indices right now. See docstring for details. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-meta 517/0 Mathlib.lean,Mathlib/Tactic/DeriveInfinite.lean,test/DeriveInfinite.lean 3 11 ['TimothyGu', 'digama0', 'eric-wieser', 'grunweg', 'kim-em', 'kmill'] kmill
assignee:kmill
466-84626
1 year ago
1078-79668
1078 days ago
9-24079
9 days
16120 awainverse
author:awainverse
 feat(ModelTheory/Algebra/Ring/Basic): Ring homomorphisms are a `StrongHomClass` for the language of rings Adds an `IsAlgebraic` instance to the language of rings Adds a `StrongHomClass` instance to the type of ring homomorphisms between rings with `CompatibleRing` structures --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra RFC t-logic
label:t-algebra$
 34/13 Mathlib/ModelTheory/Algebra/Ring/Basic.lean 1 10 ['ChrisHughes24', 'YaelDillies', 'awainverse', 'github-actions', 'jcommelin'] nobody
465-15767
1 year ago
465-15767
465 days ago
135-29017
135 days
20459 Ruben-VandeVelde
author:Ruben-VandeVelde
 chore: fix names of roots_C_mul_X_{add,sub}_C_of_IsUnit --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-algebra
label:t-algebra$
 11/5 Mathlib/Algebra/Polynomial/FieldDivision.lean,Mathlib/Algebra/Polynomial/Roots.lean 2 2 ['eric-wieser', 'github-actions'] nobody
463-40210
1 year ago
463-40210
463 days ago
4-64422
4 days
20527 trivial1711
author:trivial1711
 refactor(Topology/UniformSpace/Completion): more descriptive names for `α → Completion α` - We rename the various maps `α → Completion α` in order to make their names more consistent. - Let `α` be a uniform space. We rename the uniformly continuous function `α → Completion α` from `UniformSpace.Completion.coe'` to `UniformSpace.Completion.coe`. - Let `α` be a uniform additive group. We rename the additive group homomorphism `α →+ Completion α` from `UniformSpace.Completion.toCompl` to `UniformSpace.Completion.coeAddHom`. - Let `α` be a uniform ring. The ring homomorphism `α →+* Completion α` is called `UniformSpace.Completion.coeRingHom`; its name is unchanged. - Let `α` be a normed space over a field `𝕜`. We rename the linear isometry `α →ₗᵢ[𝕜] Completion α` from `UniformSpace.Completion.toComplₗᵢ` to `UniformSpace.Completion.coeₗᵢ`. - Let `α` be a normed space over a field `𝕜`. We rename the continuous linear map `α →L[𝕜] Completion α` from `UniformSpace.Completion.toComplL` to `UniformSpace.Completion.coeL`. - Let `α` be a normed additive group. We rename the norm preserving homomorphism `NormedAddGroupHom α (Completion α)` from `NormedAddCommGroup.toCompl` to `UniformSpace.Completion.coeNormedAddGroupHom`. - We analogously rename some other theorems. - We add some trivial theorems (all of which are proved by `rfl`) that state that the functions considered above are equal. We give all of them the `simp` and `norm_cast` attributes. - We add a new theorem `UniformSpace.Completion.coeAddHom_eq_coe` that states that `UniformSpace.Completion.coeAddHom` and `UniformSpace.Completion.coe` are equal as functions. - We similarly add a new theorem `UniformSpace.Completion.coeRingHom_eq_coe`. - We rename the theorem `UniformSpace.Completion.coe_toComplₗᵢ` to `UniformSpace.Completion.coeₗᵢ_eq_coe`. - We rename the theorem `UniformSpace.Completion.coe_toComplL` to `UniformSpace.Completion.coeL_eq_coe`. - We similarly add a new theorem `UniformSpace.Completion.coeNormedAddGroupHom_eq_coe`. - We change all occurrences of the string `((↑) : α → Completion α)` to `(coe : α → Completion α)` or just `coe`. - We put the statements of some theorems into simp normal form by using the plain function `coe` rather than the homomorphisms that carry more structure. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology 130/92 Mathlib/Analysis/Analytic/Uniqueness.lean,Mathlib/Analysis/Calculus/FDeriv/Analytic.lean,Mathlib/Analysis/Complex/AbsMax.lean,Mathlib/Analysis/Complex/Liouville.lean,Mathlib/Analysis/InnerProductSpace/Completion.lean,Mathlib/Analysis/Normed/Group/HomCompletion.lean,Mathlib/Analysis/Normed/Module/Completion.lean,Mathlib/Analysis/SpecialFunctions/NonIntegrable.lean,Mathlib/MeasureTheory/Integral/IntegralEqImproper.lean,Mathlib/Topology/Algebra/GroupCompletion.lean,Mathlib/Topology/Algebra/InfiniteSum/GroupCompletion.lean,Mathlib/Topology/Algebra/InfiniteSum/Nonarchimedean.lean,Mathlib/Topology/Algebra/Nonarchimedean/Completion.lean,Mathlib/Topology/Algebra/UniformRing.lean,Mathlib/Topology/Category/UniformSpace.lean,Mathlib/Topology/MetricSpace/Completion.lean,Mathlib/Topology/UniformSpace/Completion.lean 17 4 ['eric-wieser', 'github-actions', 'trivial1711'] nobody
458-46799
1 year ago
458-46799
458 days ago
6-66637
6 days
17739 Aaron1011
author:Aaron1011
 feat(Topology/Order/DenselyOrdered): prove Not (IsOpen) for intervals Prove that Iic/Ici/Ioc/Ico/Icc intervals are not open in densely ordered topologies with no min/max element --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-topology new-contributor 27/0 Mathlib/Topology/Order/DenselyOrdered.lean 1 8 ['github-actions', 'vihdzp'] nobody
456-34074
1 year ago
549-25644
549 days ago
0-4704
1 hour
18474 astrainfinita
author:astrainfinita
 perf: lower the priority of `*WithOne.to*` instances --- From #7873. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict slow-typeclass-synthesis t-algebra t-data
label:t-algebra$
 9/2 Mathlib/Algebra/Polynomial/BigOperators.lean,Mathlib/Data/Int/Cast/Defs.lean,Mathlib/Data/Nat/Cast/Defs.lean 3 7 ['astrainfinita', 'eric-wieser', 'github-actions', 'leanprover-bot'] nobody
456-33829
1 year ago
456-33829
456 days ago
76-67978
76 days
20656 Komyyy
author:Komyyy
 feat(Mathlib/Geometry/Manifold/VectorBundle/Sphere): convert orthogonal smooth `M → 𝕊ⁿ` & `M → ℝⁿ⁺¹` to smooth `M → T𝕊ⁿ` Current Mathlib has no easy way to define function from a manifold to tangent bundles of sphere: `T𝕊ⁿ`. This PR gives this: `sphereTangentMap`. This convert orthogonal smooth `M → 𝕊ⁿ` & `M → ℝⁿ⁺¹` to smooth `M → T𝕊ⁿ`. I also proved that if `f : M → 𝕊ⁿ` & `g : M → ℝⁿ⁺¹` are smooth then `sphereTangentMap` of `f` & `g` is smooth too. --- ⚠ **CAUTION** I formalized this in my spare time. I don't have the energy to maintain the PR, but I create this PR so this may helps everyone. The only one thing to do is proof cleanup. TODO: - [x] `contDiff_uncurry_stereoInvFunAux` & `coe_sphere_comp_stereoInvFun` may have to be moved to `Mathlib.Geometry.Manifold.Instances.Sphere`. - [ ] Proof cleanup. Current proof may be redundant and ugly. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt merge-conflict t-differential-geometry 246/6 Mathlib.lean,Mathlib/Geometry/Manifold/Instances/Sphere.lean,Mathlib/Geometry/Manifold/VectorBundle/Sphere.lean 3 1 ['github-actions'] nobody
455-68763
1 year ago
unknown
0-0
0 seconds
15711 znssong
author:znssong
 feat(Combinatorics/SimpleGraph): Some lemmas about walk, cycle and Hamiltonian cycle --- These lemmas are separated from the `meow-sister/BondyChvatal` branch and will be needed for the proof of the Bondy-Chvátal theorem. - [x] depends on: #15536 - [x] depends on: #16294 merge-conflict awaiting-author t-combinatorics new-contributor 407/3 Mathlib/Combinatorics/SimpleGraph/Finite.lean,Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean,Mathlib/Combinatorics/SimpleGraph/Path.lean,Mathlib/Combinatorics/SimpleGraph/Walk.lean 4 22 ['Rida-Hamadani', 'YaelDillies', 'github-actions', 'mathlib4-dependent-issues-bot', 'znssong'] nobody
455-53160
1 year ago
576-64321
576 days ago
9-13962
9 days
18629 tomaz1502
author:tomaz1502
 feat(Computability.Timed): Formalization of runtime complexity of List.merge This PR adds the formalization of the runtime complexity of the merge function, defined in `Data/List/Sort`. Requires: https://github.com/leanprover-community/mathlib4/pull/15450 References: - Previous PR on mathlib3: https://github.com/leanprover-community/mathlib3/pull/14494/ - First discussion on Zulip: https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/BSc.20Final.20Project/near/220647062 - Second disussion on Zulip: https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/Formalization.20of.20Runtime.20Complexity.20of.20Sorting.20Algorithms/near/284184450 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability awaiting-author new-contributor 186/0 Mathlib.lean,Mathlib/Computability/Timed/InsertionSort.lean,Mathlib/Computability/Timed/Merge.lean 3 2 ['github-actions', 'trivial1711'] nobody
455-19079
1 year ago
495-18692
495 days ago
33-8818
33 days
14412 jjaassoonn
author:jjaassoonn
 feat: show stalk of presheaf of modules is a module over stalk of ring --- - [x] depends on: #14413 - [ ] depends on: #14501 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebraic-geometry blocked-by-other-PR workshop-AIM-AG-2024 966/2 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/OverColimitsRing'.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/OverColimitsRing.lean,Mathlib/CategoryTheory/Filtered/Basic.lean,Mathlib/CategoryTheory/Limits/ConcreteCategory.lean,Mathlib/Geometry/RingedSpace/Basic.lean,Mathlib/Geometry/RingedSpace/Module.lean,Mathlib/Topology/Sheaves/Stalks.lean 8 5 ['github-actions', 'jjaassoonn', 'leanprover-community-mathlib4-bot', 'smorel394'] nobody
453-37662
1 year ago
unknown
0-0
0 seconds
8362 urkud
author:urkud
 feat(Asymptotics): define `ReflectsGrowth` --- - [x] depends on: #8349 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-analysis 268/0 Mathlib.lean,Mathlib/Analysis/Asymptotics/ReflectsGrowth.lean 2 14 ['YaelDillies', 'fpvandoorn', 'github-actions', 'leanprover-community-mathlib4-bot', 'urkud'] nobody
453-26333
1 year ago
644-78160
644 days ago
240-47513
240 days
6692 prakol16
author:prakol16
 feat: disjoint indexed union of local homeomorphisms Add disjoint indexed union of local equivs and local homeomorphisms --- This is leading up to PRing some things related to covering spaces that I wrote a long time ago in lean 3 but never submitted a PR for. Note that this was converted using mathport. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-topology 126/0 Mathlib/Logic/Equiv/PartialEquiv.lean,Mathlib/Topology/PartialHomeomorph.lean 2 4 ['alreadydone', 'github-actions', 'winstonyin'] nobody
453-10929
1 year ago
545-20948
545 days ago
118-5497
118 days
18461 hannahfechtner
author:hannahfechtner
 feat: left and right common multiples mixins add mixins for left and right common multiples. These carry the data of what factors are used to create the common multiples --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-algebra new-contributor
label:t-algebra$
 78/0 Mathlib/Algebra/Group/Defs.lean 1 13 ['github-actions', 'hannahfechtner', 'jcommelin', 'kbuzzard', 'kim-em', 'trivial1711'] nobody
451-66659
1 year ago
451-66659
451 days ago
69-24210
69 days
19291 PieterCuijpers
author:PieterCuijpers
 feat(Algebra/Order/Hom): add quantale homomorphism Definition of quantale homomorphisms as functions that are both semigroup homomorphisms and complete lattice homomorphisms. --- - [x] depends on: #19810 - [x] depends on: #19811 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra new-contributor
label:t-algebra$
 209/0 Mathlib.lean,Mathlib/Algebra/Order/Hom/Quantale.lean,scripts/noshake.json 3 29 ['PieterCuijpers', 'YaelDillies', 'github-actions', 'kim-em', 'mathlib4-dependent-issues-bot'] nobody
450-40738
1 year ago
456-8139
456 days ago
27-52347
27 days
19352 hrmacbeth
author:hrmacbeth
 chore: change some `nlinarith`s to `linear_combination`s --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 13/13 Archive/Imo/Imo2021Q1.lean,Archive/Wiedijk100Theorems/AreaOfACircle.lean,Mathlib/Analysis/Normed/Group/AddCircle.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Analysis/Normed/Ring/Units.lean,Mathlib/Analysis/SpecialFunctions/Complex/LogBounds.lean,Mathlib/Combinatorics/SimpleGraph/Regularity/Increment.lean,Mathlib/NumberTheory/Modular.lean 8 4 ['github-actions', 'hrmacbeth', 'leanprover-bot'] nobody
448-69949
1 year ago
510-81654
510 days ago
0-8636
2 hours
20372 jvlmdr
author:jvlmdr
 feat(MeasureTheory/Function): Add ContinuousLinearMap.bilinearCompLp(L) Introduce ContinuousLinearMap.bilinearCompLp and bilinearCompLpL. Generalize eLpNorm_le_eLpNorm_mul_eLpNorm theorems to include constant C in bound condition. --- Expect this may be useful for defining tempered distributions from functions in `L^p`. The definitions more or less follow `ContinuousLinearMap.compLp...`. Names are loosely analogous to `ContinuousLinearMap.bilinearComp` and `SchwartzMap.bilinLeftCLM`. Note: I preferred the spelling `hpqr : p⁻¹ + q⁻¹ = r⁻¹` with `f` in `L^p` and `g` in `L^q` to `hpqr : 1 / p = 1 / q + 1 / r`. It's easier to obtain from `ENNReal.IsConjExponent` too. A few questions: - [ ] I defined `bilinear{Left,Right}LpL` in addition to `bilinearCompLpL` because `LinearMap.mkContinuous₂` is marked as `noncomputable` and `LinearMap.mkContinuous` is not. Is this worth the extra definitions? (Note: This is not visible in the source due to `noncomputable section`.) - [ ] Should I use `C : ℝ` instead of `C : NNReal` for `eLpNorm_le_eLpNorm_mul_eLpNorm'_of_norm'`? - [ ] Is it going to be painful to have `[Fact (1 ≤ p)] [Fact (1 ≤ q)] [Fact (1 ≤ r)]`? I don't think there's a way to avoid it though. Maybe providing specialized versions for `p.IsConjExponent q` with `L^1`? Naming: - [ ] Is it satisfactory to add a `'` to the `eLpNorm_le_eLpNorm_mul_eLpNorm ` definitions in `CompareExp.lean` where `≤ ‖f x‖ * ‖g x‖` has been replaced with `≤ C * ‖f x‖ * ‖g x‖`? These could replace the existing theorems, although I don't want to break backwards compatibility. There are 5 instances: `eLpNorm_le_eLpNorm_top_mul_eLpNorm'`, `eLpNorm_le_eLpNorm_mul_eLpNorm_top'`, `eLpNorm'_le_eLpNorm'_mul_eLpNorm''`, `eLpNorm_le_eLpNorm_mul_eLpNorm_of_nnnorm'`, `eLpNorm_le_eLpNorm_mul_eLpNorm'_of_norm'` (I'm not sure why the existing theorem `eLpNorm_le_eLpNorm_mul_eLpNorm'_of_norm` has an internal `'`) - [ ] Is `bilinearLeftLpL` a suitable name? Other options: `bilinearCompLpLeftL`, `bilinearCompLeftLpL`, `bilinLeftLpL` (analogous to `SchwartzMap.bilinLeftCLM`) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-measure-probability new-contributor 203/40 Mathlib/MeasureTheory/Function/LpSeminorm/CompareExp.lean,Mathlib/MeasureTheory/Function/LpSpace.lean 2 1 ['github-actions'] nobody
443-58086
1 year ago
443-58086
443 days ago
27-43617
27 days
2605 eric-wieser
author:eric-wieser
 chore: better error message in linarith On this mwe: ```lean import Mathlib.Tactic.Linarith example (s : Set ℕ) (h : s = s) : 0 ≤ 1 := by linarith ``` this now indicates where the internal error is coming from. Is there a better way of chaining errors than this? --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-meta 12/1 Mathlib/Tactic/Linarith/Preprocessing.lean 1 3 ['Vierkantor', 'harahu', 'kim-em', 'mo271'] nobody
441-48679
1 year ago
1088-80218
1088 days ago
51-42225
51 days
11837 trivial1711
author:trivial1711
 feat: completion of a uniform multiplicative group Multiplicativize `Topology.Algebra.GroupCompletion`. That is, rewrite it in the multiplicative setting and recover the original results using `@[to_additive]`. - Because `@[to_additive]` doesn't work with `noncomputable section` (https://github.com/leanprover/lean4/pull/2610), some instances with `@[to_additive]` need to be explicitly marked with `noncomputable instance`. - One might be tempted to multiplicativize this definition from `Topology.Algebra.GroupCompletion`: ```lean instance [UniformSpace α] [Add α] : Add (Completion α) := ⟨Completion.map₂ (· + ·)⟩ ``` to this: ```lean @[to_additive] instance [UniformSpace α] [Mul α] : Mul (Completion α) := ⟨Completion.map₂ (· * ·)⟩ ``` However, as Eric Wieser pointed out, doing so would create a bad diamond with the definition ```lean instance [UniformSpace α] [TopologicalRing α] [UniformAddGroup α] [Ring α] : Mul (Completion α) := ⟨curry <| (denseInducing_coe.prod denseInducing_coe).extend ((↑) ∘ uncurry (· * ·))⟩ ``` in `Topology.Algebra.UniformRing`. How should this diamond be resolved? Well, the definition of multiplication that uses `curry <| (denseInducing_coe.prod denseInducing_coe).extend ((↑) ∘ uncurry (· * ·))` is the "correct" one. For example, it yields the correct result if `α` is `ℚ`, unlike the definition that uses `Completion.map₂ (· * ·)`. (This is because `Completion.map₂` yields junk values if used on a function which is not uniformly continuous. Note, however, that if multiplication on `α` *is* uniformly continuous, then `Completion.map₂ (· * ·)` and `curry <| (denseInducing_coe.prod denseInducing_coe).extend ((↑) ∘ uncurry (· * ·))` are propositionally equal.) So, following Eric's suggestion, we remove the definition that uses `Completion.map₂ (· * ·)`, and generalize the other definition to any uniform space with a multiplication operation: ```lean @[to_additive] noncomputable instance [UniformSpace α] [Mul α] : Mul (Completion α) := ⟨curry <| (denseInducing_coe.prod denseInducing_coe).extend ((↑) ∘ uncurry (· * ·))⟩ ``` This requires slightly modifying some of the proofs in `Topology.Algebra.GroupCompletion`. For example, suppose that `α` is a uniform group. Since we can no longer use `Completion.continuous_map₂`, it becomes more efficient to prove that the multiplication, inversion, and division operations on `Completion α` are uniformly continuous *before* we prove that `Completion α` is a group. - Previously, `Topology.Algebra.GroupCompletion` had an instance: ```lean instance [UniformSpace α] [Sub α] : Sub (Completion α) := ... ``` Naively multiplicativizing this would yield ```lean @[to_additive] instance [UniformSpace α] [Inv α] : Inv (Completion α) := ... ``` Unfortunately, this would conflict with `Topology.Algebra.UniformField`, which already instantiates `Inv (Completion α)` when `α` is a uniform field. Instead, we use two different `instance` declarations. (If `α` is an additive group, then this instantiates `Neg (Completion α)` twice, and the instances are syntactically equal.) ```lean @[to_additive] noncomputable instance [UniformSpace α] [Group α] : Inv (Completion α) := ... instance [UniformSpace α] [Neg α] : Neg (Completion α) := ... ``` This avoids the bad diamond (because a uniform field can never be a `Group`) while remaining backward compatible. Note that the `@[to_additive]` is necessary here, because it maintains the link between the additive setting and multiplicative setting. We use a similar method to instantiate `Div (Completion α)`. - Some definitions in this file involve a module structure on `α`. We leave these as is and do not attempt to multiplicativize them at all. - The instance of `DistribMulAction` must be multiplicativized to an instance of `MulDistribMulAction` manually. Zulip thread: https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Completion.20of.20a.20uniform.20multiplicative.20group --- # (Small) Issue Recall the following trick that this pull request uses to define inversion and negation on uniform spaces. The idea is that we define negation on the completion of any uniform space that has a negation operation, but we define inversion on only the completion of a uniform space that has the structure of a multiplicative group. We do this to avoid creating a bad diamond with the inversion operation on a uniform field. ```lean @[to_additive] noncomputable instance {α : Type*} [UniformSpace α] [Group α] : Inv (Completion α) := ... instance {α : Type*} [UniformSpace α] [Neg α] : Neg (Completion α) := ... ``` Now, suppose that we want to prove `coe_inv_of_group` (resp. `coe_neg`), which states that the coercion `α → Completion α` commutes with inversion (resp. negation). In the current version of this pull request, `coe_inv_of_group` (resp. `coe_neg`) only applies to uniform multiplicative (resp. additive) groups. However, we do not use the fact that multiplication (resp. addition) on `α` is uniformly continuous to prove it. We only use the fact that inversion (resp. negation) is continuous. So, what we really want is to have more general statements that look like this: ```lean theorem coe_inv_of_group {α : Type*} [UniformSpace α] [Group α] [ContinuousInv α] : ... theorem coe_neg {α : Type*} [UniformSpace α] [Neg α] [ContinuousNeg α] : ... ``` Note that `coe_inv_of_group` needs the assumption `[Group α]`, because otherwise inversion is not defined on `Completion α` at all. However, `coe_neg` does not need the analogous assumption `[AdditiveGroup α]`. The question is: If `coe_inv_of_group` and `coe_neg` are written in this more general form, how can we link them using `@[to_additive]`? Here is one option, but it obviously leaves something to be desired. ```lean @[to_additive coe_neg_do_not_use_this_use_the_more_general_version] theorem coe_inv_of_group {α : Type*} [UniformSpace α] [Group α] [ContinuousInv α] : ... theorem coe_neg {α : Type*} [UniformSpace α] [Neg α] [ContinuousNeg α] : ... ``` Co-authored-by: Eric Wieser --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra merge-conflict help-wanted t-topology
label:t-algebra$
 342/217 Mathlib/Analysis/InnerProductSpace/Completion.lean,Mathlib/Analysis/Normed/Group/HomCompletion.lean,Mathlib/Analysis/Normed/Module/Completion.lean,Mathlib/Topology/Algebra/GroupCompletion.lean,Mathlib/Topology/Algebra/InfiniteSum/GroupCompletion.lean,Mathlib/Topology/Algebra/Nonarchimedean/Completion.lean,Mathlib/Topology/Algebra/UniformField.lean,Mathlib/Topology/Algebra/UniformMulAction.lean,Mathlib/Topology/Algebra/UniformRing.lean 9 14 ['eric-wieser', 'github-actions', 'trivial1711'] nobody
441-26184
1 year ago
470-38463
470 days ago
101-64856
101 days
12670 trivial1711
author:trivial1711
 feat: completion of a nonarchimedean multiplicative group We prove that the completion of a nonarchimedean multiplicative group is a nonarchimedean multiplicative group. --- - [x] depends on: #12669 - [ ] depends on: #11837 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra t-topology blocked-by-other-PR
label:t-algebra$
 358/228 Mathlib/Analysis/InnerProductSpace/Completion.lean,Mathlib/Analysis/Normed/Group/HomCompletion.lean,Mathlib/Analysis/Normed/Module/Completion.lean,Mathlib/Topology/Algebra/GroupCompletion.lean,Mathlib/Topology/Algebra/InfiniteSum/GroupCompletion.lean,Mathlib/Topology/Algebra/Nonarchimedean/Completion.lean,Mathlib/Topology/Algebra/UniformField.lean,Mathlib/Topology/Algebra/UniformMulAction.lean,Mathlib/Topology/Algebra/UniformRing.lean 9 2 ['github-actions', 'leanprover-community-mathlib4-bot'] nobody
441-26061
1 year ago
468-7517
468 days ago
50-17994
50 days
21384 alreadydone
author:alreadydone
 experiment: make submodule quotient reducibly defeq to additive group quotient --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 1/1 Mathlib/LinearAlgebra/Quotient/Defs.lean 1 1 ['github-actions'] nobody
437-37826
1 year ago
unknown
0-0
0 seconds
9449 hmonroe
author:hmonroe
 feat: Add Turing machine with the quintet definition (TMQ) and a chainable step function for each TM type --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability awaiting-author 458/1 Mathlib/Computability/TuringMachine.lean,Mathlib/Logic/PartArith.lean 2 8 ['eric-wieser', 'github-actions', 'hmonroe'] nobody
435-77263
1 year ago
741-59886
741 days ago
91-37374
91 days
18719 astrainfinita
author:astrainfinita
 perf: lower the priority of `SemilinearMapClass.toAddHomClass` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict slow-typeclass-synthesis t-algebra awaiting-bench
label:t-algebra$
 14/7 Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Unique.lean,MathlibTest/TCSynth.lean 3 4 ['astrainfinita', 'github-actions', 'leanprover-bot'] nobody
434-52080
1 year ago
unknown
0-0
0 seconds
19697 quangvdao
author:quangvdao
 feat(BigOperators/Fin): Sum/product over `Fin` intervals This PR adds new theorems about the sum/product of some vector over `Fin` intervals. One example is: ``` @[to_additive] theorem prod_Iic_succ (i : Fin n) : ∏ j ∈ Iic i.succ, v j = (∏ j ∈ Iic i.castSucc, v j) * v i.succ ``` --- - [x] depends on: #20360 This is in preparation for reworking `finSigmaFinEquiv` and `finProdFinEquiv` in #19013. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-data 87/12 Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Data/Fintype/Fin.lean,Mathlib/Order/Interval/Finset/Fin.lean 3 20 ['Ruben-VandeVelde', 'YaelDillies', 'eric-wieser', 'github-actions', 'mathlib4-dependent-issues-bot', 'quangvdao'] nobody
433-33281
1 year ago
467-69211
467 days ago
6-25961
6 days
19353 hrmacbeth
author:hrmacbeth
 chore: golf some term/rw proofs using `linear_combination` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 47/102 Archive/Wiedijk100Theorems/SumOfPrimeReciprocalsDiverges.lean,Mathlib/Analysis/Convex/Slope.lean,Mathlib/Analysis/Seminorm.lean,Mathlib/MeasureTheory/Integral/RieszMarkovKakutani.lean,Mathlib/NumberTheory/Modular.lean,Mathlib/NumberTheory/Zsqrtd/Basic.lean,Mathlib/Topology/ContinuousMap/ZeroAtInfty.lean 7 5 ['github-actions', 'grunweg', 'hrmacbeth', 'leanprover-bot'] grunweg
assignee:grunweg
432-32402
1 year ago
510-81646
510 days ago
0-7781
2 hours
20248 peabrainiac
author:peabrainiac
 feat(Topology/Compactness): first-countable locally path-connected spaces are delta-generated Shows that all first-countable locally path-connected spaces are delta-generated (so in particular all normed spaces and convex subsets thereof are), and that delta-generated spaces are equivalently generated by the unit interval or standard simplices. --- - [ ] depends on: #21616 In principle, this should be close to all that's required to show that all simplicial complexes and CW-complexes are delta-generated; I just haven't done it yet because I'm not sure which file to best do it in. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR large-import new-contributor merge-conflict awaiting-author t-topology 1189/813 Mathlib.lean,Mathlib/Geometry/Manifold/ChartedSpace.lean,Mathlib/Topology/Algebra/Module/LocallyConvex.lean,Mathlib/Topology/Compactness/DeltaGeneratedSpace.lean,Mathlib/Topology/Connected/LocPathConnected.lean,Mathlib/Topology/Connected/PathConnected.lean,Mathlib/Topology/ContinuousOn.lean,Mathlib/Topology/Homotopy/HSpaces.lean,Mathlib/Topology/Path.lean 9 22 ['YaelDillies', 'github-actions', 'kbuzzard', 'mathlib4-dependent-issues-bot', 'peabrainiac'] nobody
431-15396
1 year ago
437-66313
437 days ago
39-21495
39 days
21610 JLimperg
author:JLimperg
 Aesop forward benchmark: forward precomp Not a real PR, just for benchmarking. merge-conflict 30/27 Mathlib/Data/List/InsertIdx.lean,Mathlib/Tactic/Recall.lean,Mathlib/Topology/List.lean,Test.lean,lake-manifest.json,lakefile.lean,lean-toolchain 7 3 ['JLimperg', 'github-actions', 'leanprover-bot'] nobody
430-51287
1 year ago
unknown
0-0
0 seconds
21611 JLimperg
author:JLimperg
 Aesop forward benchmark: master no-precomp Not a real PR, just for benchmarking. merge-conflict 30/27 Mathlib/Data/List/InsertIdx.lean,Mathlib/Tactic/Recall.lean,Mathlib/Topology/List.lean,Test.lean,lake-manifest.json,lakefile.lean,lean-toolchain 7 4 ['JLimperg', 'github-actions', 'leanprover-bot'] nobody
430-51286
1 year ago
unknown
0-0
0 seconds
21612 JLimperg
author:JLimperg
 Aesop forward benchmark: master precomp Not a real PR, just for benchmarking. merge-conflict 30/27 Mathlib/Data/List/InsertIdx.lean,Mathlib/Tactic/Recall.lean,Mathlib/Topology/List.lean,Test.lean,lake-manifest.json,lakefile.lean,lean-toolchain 7 3 ['JLimperg', 'github-actions', 'leanprover-bot'] nobody
430-51285
1 year ago
unknown
0-0
0 seconds
10678 adri326
author:adri326
 feat(Topology/UniformSpace): prove that a uniform space is completely regular Provides the pseudometric definition of a uniform space (for any open set `s` and `x ∈ s`, there exists a finite family of pseudometric spaces on `X` and an `ε > 0`, such that the intersection of the balls of these pseudometric spaces is a subset of `s`), and uses it to prove that `UniformSpace X` implies `CompletelyRegularSpace X`. --- This PR aims to close the gap of pi-base's theorem [T345](https://topology.pi-base.org/theorems/T000345), which says that topological groups are completely regular. We already have a proof that topological groups are uniform, but it turns out that we do not have any connection between `UniformSpace X` and `CompletelyRegularSpace X`. There is an equivalence between `UniformSpace X` and `CompletelyRegularSpace X`: the former implies the latter, and the latter implies *the existence of* the former. This PR provides the first half of this equivalence. The construction of the pseudometric definition is based on N. Bourbaki, Chapter 9, Theorem 4.1 The proof that a uniform space is completely regular is based on [the outline on mathexchange](https://math.stackexchange.com/questions/494718/how-to-prove-that-every-uniform-space-is-completely-regular). I tried to outline the major steps of the different proofs inside of comments; I can happily be more verbose to clear up any confusion. See [the corresponding Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Some.20missing.2C.20accessible.2C.20topology.20results) for more context. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-topology 332/0 Mathlib.lean,Mathlib/Topology/UniformSpace/Basic.lean,Mathlib/Topology/UniformSpace/CompletelyRegular.lean 3 6 ['ADedecker', 'adri326'] ADedecker
assignee:ADedecker
430-26813
1 year ago
771-50492
771 days ago
17-44804
17 days
18785 erdOne
author:erdOne
 feat(CategoryTheory): command that generates instances for `MorphismProperty` Co-authored-by: Calle Sönne --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory t-meta 369/0 Mathlib.lean,Mathlib/CategoryTheory/MorphismProperty/Tactic.lean,MathlibTest/AddMorphismPropertyInstances.lean,scripts/noshake.json 4 19 ['alexjbest', 'chrisflav', 'erdOne', 'github-actions', 'grunweg', 'jcommelin', 'joelriou'] nobody
428-43323
1 year ago
449-71593
449 days ago
52-4018
52 days
16311 madvorak
author:madvorak
 feat(Computability): regular languages are context-free --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-computability 72/0 Mathlib.lean,Mathlib/Computability/Chomsky.lean,Mathlib/Computability/ContextFreeGrammar.lean 3 7 ['Rida-Hamadani', 'YaelDillies', 'github-actions', 'madvorak'] nobody
426-49742
1 year ago
unknown
0-0
0 seconds
19943 AlexLoitzl
author:AlexLoitzl
 feat(Computability): Add Chomsky Normal Form Grammar and translation - Define Chomsky normal form grammars - Add language-preserving translation between context-free grammars and Chomsky normal form grammars Co-authored-by: Martin Dvorak martin.dvorak@matfyz.cz --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability awaiting-author new-contributor 3151/0 Mathlib.lean,Mathlib/Computability/ChomskyNormalForm/Basic.lean,Mathlib/Computability/ChomskyNormalForm/EmptyElimination.lean,Mathlib/Computability/ChomskyNormalForm/LengthRestriction.lean,Mathlib/Computability/ChomskyNormalForm/TerminalRestriction.lean,Mathlib/Computability/ChomskyNormalForm/Translation.lean,Mathlib/Computability/ChomskyNormalForm/UnitElimination.lean,Mathlib/Computability/ContextFreeGrammar.lean 8 59 ['AlexLoitzl', 'YaelDillies', 'github-actions', 'kim-em', 'madvorak'] nobody
426-49495
1 year ago
433-61117
433 days ago
37-29014
37 days
21501 sksgurdldi
author:sksgurdldi
 feat(List): add sum_zipWith_eq_finset_sum ### **Description:** This PR adds the lemma `List.sum_zipWith_eq_finset_sum` to `Mathlib.Algebra.BigOperators.Group.Finset.Basic`. #### **Statement:** The sum of the `zipWith` operation on two lists equals the sum of applying the operation to corresponding elements of the two lists, indexed over the minimum of their lengths. #### **Formal Statement:** ```lean lemma sum_zipWith_eq_finset_sum [Inhabited α] [Inhabited β] [AddCommMonoid γ] {op : α → β → γ} (l : List α) (m : List β) : (List.zipWith op l m).sum = ∑ x ∈ (Finset.range (Nat.min l.length m.length)), op (l[x]!) (m[x]!) ``` #### **Remarks:** - This lemma provides a useful equivalence between `List.zipWith` and summation over a `Finset.range` indexed by `Nat.min l.length m.length`. - It can be helpful in algebraic manipulations involving list-based summations. #### **Dependencies:** No additional dependencies. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-algebra new-contributor
label:t-algebra$
 43/0 Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean 1 1 ['github-actions', 'j-loreaux'] nobody
421-18266
1 year ago
421-18266
421 days ago
13-33168
13 days
12054 adomani
author:adomani
 feat: auto-bugs This PR introduces a linter for suggesting bugs in tactics. See * #12077 * #12083 * #12084 for some bugs exposed by the test suite. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-meta 737/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/MetaTesting.lean,scripts/noshake.json,test/MetaTesting.lean 5 20 ['adomani', 'eric-wieser', 'github-actions', 'joneugster', 'kim-em'] joneugster
assignee:joneugster
421-5923
1 year ago
633-64341
633 days ago
45-6051
45 days
5062 adomani
author:adomani
 feat(Tactic/Prune + test/Prune): add `prune` tactic, for removing unnecessary hypotheses This tactic removes very conservatively all local declarations that 1. do not appear in the main goal, 2. do not appear in a declaration that appears in the main goal, 3. ... and so on recursively. The main motivation for this tactic is that all available variables in the current `namespace/section` appear in the goal state, not just the ones that are needed for the statement to type-check. Using `prune` mitigates this situation. The tactic also admits an optional natural number argument: `prune n` removes all variables that have not appeared at the `(n+1)`-st stage in the above list. Thus, `prune 0` only leaves the variables needed for the statement to type-check. Also, for sufficiently large `n`, `prune n` is a synonym for `prune`. [Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/270676-lean4/topic/substitute.20for.20.60include.2Fomit.60.3F) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict modifies-tactic-syntax awaiting-author t-meta 181/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Prune.lean,test/Prune.lean 4 5 ['adomani', 'j-loreaux', 'kmill'] nobody
420-59630
1 year ago
841-44961
841 days ago
195-57118
195 days
22169 JLimperg
author:JLimperg
 Aesop forward benchmark: forward no-precomp naive Not a real PR, just for benchmarking. merge-conflict 31/27 Mathlib/Data/List/InsertIdx.lean,Mathlib/Tactic/Recall.lean,Mathlib/Topology/List.lean,Test.lean,lake-manifest.json,lakefile.lean,lean-toolchain 7 6 ['JLimperg', 'github-actions', 'leanprover-bot'] nobody
419-25294
1 year ago
unknown
0-0
0 seconds
21433 grunweg
author:grunweg
 chore: change more lemmas to be about enorm instead of nnnorm --- - [x] depends on: #21782 - [x] depends on: #21783 (and this PR modifies the file split, and file splits are painful to merge over) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author carleson t-measure-probability 172/71 Mathlib/Analysis/Distribution/SchwartzSpace.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Analysis/SpecialFunctions/Pow/NNReal.lean,Mathlib/Data/ENNReal/Basic.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Function/LpSeminorm/CompareExp.lean,Mathlib/MeasureTheory/Function/LpSpace/Basic.lean,Mathlib/MeasureTheory/Function/LpSpace/ContinuousFunctions.lean,Mathlib/MeasureTheory/Function/UniformIntegrable.lean 9 18 ['RemyDegenne', 'github-actions', 'grunweg', 'j-loreaux', 'mathlib4-dependent-issues-bot'] nobody
419-24483
1 year ago
426-20548
426 days ago
2-38741
2 days
22171 JLimperg
author:JLimperg
 Aesop forward benchmark: forward no-precomp naive rpinf pr-release Not a real PR, just for benchmarking. merge-conflict 31/27 Mathlib/Data/List/InsertIdx.lean,Mathlib/Tactic/Recall.lean,Mathlib/Topology/List.lean,Test.lean,lake-manifest.json,lakefile.lean,lean-toolchain 7 5 ['JLimperg', 'github-actions', 'leanprover-bot'] nobody
418-33167
1 year ago
unknown
0-0
0 seconds
20454 urkud
author:urkud
 chore(TangentCone): review names Also add some `@[simp]` attrs. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-analysis 201/139 Mathlib/Analysis/Analytic/IteratedFDeriv.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Bounds.lean,Mathlib/Analysis/Calculus/ContDiff/Defs.lean,Mathlib/Analysis/Calculus/ContDiff/FTaylorSeries.lean,Mathlib/Analysis/Calculus/Deriv/Abs.lean,Mathlib/Analysis/Calculus/Deriv/Basic.lean,Mathlib/Analysis/Calculus/FDeriv/Add.lean,Mathlib/Analysis/Calculus/FDeriv/Basic.lean,Mathlib/Analysis/Calculus/FDeriv/Equiv.lean,Mathlib/Analysis/Calculus/FDeriv/Measurable.lean,Mathlib/Analysis/Calculus/FDeriv/RestrictScalars.lean,Mathlib/Analysis/Calculus/FDeriv/Symmetric.lean,Mathlib/Analysis/Calculus/IteratedDeriv/Lemmas.lean,Mathlib/Analysis/Calculus/MeanValue.lean,Mathlib/Analysis/Calculus/TangentCone.lean,Mathlib/Analysis/Calculus/Taylor.lean,Mathlib/Analysis/Calculus/VectorField.lean,Mathlib/Analysis/Convex/SpecificFunctions/Deriv.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/InverseDeriv.lean,Mathlib/Geometry/Manifold/Instances/Real.lean,Mathlib/Geometry/Manifold/IsManifold/Basic.lean,Mathlib/Geometry/Manifold/MFDeriv/UniqueDifferential.lean,Mathlib/Geometry/Manifold/VectorBundle/Tangent.lean,Mathlib/MeasureTheory/Integral/FundThmCalculus.lean 25 3 ['github-actions', 'sgouezel', 'urkud'] nobody
414-71063
1 year ago
422-73693
422 days ago
4-9045
4 days
21608 JLimperg
author:JLimperg
 Aesop forward benchmark: forward no-precomp rpinf pr-release Not a real PR, just for benchmarking. merge-conflict 38/29 Mathlib/Data/List/InsertIdx.lean,Mathlib/Data/Nat/Prime/Defs.lean,Mathlib/Tactic/Recall.lean,Mathlib/Topology/List.lean,Test.lean,lake-manifest.json,lakefile.lean,lean-toolchain 8 13 ['JLimperg', 'github-actions', 'leanprover-bot'] nobody
414-45796
1 year ago
unknown
0-0
0 seconds
21609 JLimperg
author:JLimperg
 Aesop forward benchmark: forward no-precomp Not a real PR, just for benchmarking. merge-conflict 38/29 Mathlib/Data/List/InsertIdx.lean,Mathlib/Data/Nat/Prime/Defs.lean,Mathlib/Tactic/Recall.lean,Mathlib/Topology/List.lean,Test.lean,lake-manifest.json,lakefile.lean,lean-toolchain 8 13 ['JLimperg', 'github-actions', 'leanprover-bot'] nobody
414-44160
1 year ago
unknown
0-0
0 seconds
16550 awainverse
author:awainverse
 feat(ModelTheory): A typeclass for languages expanding other languages Defines `L.Expands L'` to consist of a privileged injective inclusion, `L'.Inclusion L`, from `L'` to `L`, corresponding to one language being a subset of the other in set-theoretic foundations. Replaces `L.IsOrdered` with `L.Expands Language.order` and `L.OrderLHom` with `Language.order.Inclusion L` Redefines `leSymb` in terms of `Language.order.Inclusion L` Deletions: - `FirstOrder.Language.IsOrdered` - `FirstOrder.Language.OrderLHom` - `instance : IsOrdered Language.order` - `sum.instIsOrdered` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-logic 97/43 Mathlib/ModelTheory/LanguageMap.lean,Mathlib/ModelTheory/Order.lean 2 9 ['YaelDillies', 'awainverse', 'github-actions'] nobody
414-23531
1 year ago
586-54762
586 days ago
0-61590
17 hours
10823 alexkeizer
author:alexkeizer
 feat: convert curried type functions into uncurried type functions Adds a conversion `TypeFun.ofCurried : CurriedTypeFun.{u, v} n -> TypeFun.{u, v} n`, where `CurriedTypeFun.{u,v} n` is a (def-eq) abbreviation for `Type u -> ... -> Type u -> Type v`, i.e., the type of *curried* functions taking `n` arguments of type `Type u` to return an element of `Type v`, and `TypeFun.{u, v} n` is an abbreviation for `TypeVec.{u} n -> Type v`. It is generally more idiomatic to define type functions with multiple arguments in the curried style, but in the QPF development we use the uncurried equivalent `TypeVec n -> Type _`. Thus, having a canonical conversion from curried functions to uncurried gives us a canonical way to ask if a curried type function, say `Sum` is a QPF (namely, "is there an instance of `MvQPF (TypeFun.ofCurried Sum)`"). --- This is code ported from https://github.com/alexkeizer/QpfTypes, where this conversion is crucial in presenting a high-level interface, in terms of idiomatic, curried, type functions to users, while being built on QPFs (and thus, uncurried typefunctions) underneath. There is also a conversion in the other direction, from uncurried to curried, which I've decided to PR later, to keep this PR smaller and hopefully easier to review. - [x] depends on: #10818 (all changes to `Fin2.lean` are part of 10818, not the current PR) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-data 66/0 Mathlib.lean,Mathlib/Data/TypeFun.lean 2 9 ['YaelDillies', 'alexkeizer', 'github-actions', 'leanprover-community-mathlib4-bot'] nobody
411-36124
1 year ago
662-20724
662 days ago
15-9013
15 days
13648 urkud
author:urkud
 feat(Topology/Module): generalize `ContinuousLinearMap.compSL` Generalize `ContinuousLinearMap.compSL` to topological vector spaces. --- - [ ] depends on: #15217 This PR is not polished yet, but the main statement is there. @ADedecker This answers a question I asked you on Zulip a few months ago. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict awaiting-author t-topology t-analysis
label:t-algebra$
 23/18 Mathlib/Analysis/NormedSpace/OperatorNorm/Bilinear.lean,Mathlib/Topology/Algebra/Module/StrongTopology.lean 2 5 ['fpvandoorn', 'github-actions', 'mathlib4-dependent-issues-bot', 'urkud'] nobody
409-59214
1 year ago
647-42141
647 days ago
28-69042
28 days
19372 Command-Master
author:Command-Master
 find defeq abuse using diagnostics --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [ ] depends on: #19177 merge-conflict blocked-by-other-PR large-import 169/1 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter.lean,Mathlib/Tactic/Linter/FindDefEqAbuse.lean,MathlibTest/FindDefEqAbuse.lean,lakefile.lean 6 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
409-58714
1 year ago
unknown
0-0
0 seconds
22408 JLimperg
author:JLimperg
 Aesop forward bench: precomp only rpinf --- Not a real PR (yet), just for benchmarking. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict dependency-bump 5/3 lake-manifest.json,lakefile.lean,scripts/bench/fake-root/lib/lean/libleanshared.so,scripts/bench/run 4 6 ['JLimperg', 'github-actions', 'leanprover-bot'] nobody
409-47618
1 year ago
unknown
0-0
0 seconds
20636 eric-wieser
author:eric-wieser
 feat: multiplication of intervals in rings --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-algebra
label:t-algebra$
 36/1 Mathlib/Algebra/Order/Interval/Basic.lean 1 16 ['Timeroot', 'YaelDillies', 'eric-wieser', 'github-actions'] nobody
408-31183
1 year ago
444-34960
444 days ago
17-17852
17 days
16000 YaelDillies
author:YaelDillies
 feat: Croot-Sisask Almost Periodicity Almost periodicity is nowadays a standard tool in additive combinatorics. From LeanAPAP --- - [ ] depends on: #15443 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics t-analysis blocked-by-other-PR 0/0 0 4 ['github-actions', 'leanprover-community-mathlib4-bot', 'mergify'] nobody
407-60504
1 year ago
604-54175
604 days ago
0-159
2 minutes
22340 sinhp
author:sinhp
 feat(CategoryTheory): Locally Cartesian Closed Categories (Beck-Chevalley Conditions) Building on top of the API of `ExponentiableMorphism` in #22321, we state and prove Beck-Chevalley conditions. This will be crucial for our development of polynomial functors along exponentiable morphisms. Co-authored-by: Emily Riehl --- - [ ] depends on: #22321 - [ ] depends on: #22319 - [ ] depends on: #21525 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP blocked-by-other-PR t-category-theory large-import merge-conflict 1144/24 Mathlib.lean,Mathlib/CategoryTheory/Comma/Over/Basic.lean,Mathlib/CategoryTheory/Comma/Over/Pullback.lean,Mathlib/CategoryTheory/Comma/Over/Sections.lean,Mathlib/CategoryTheory/Galois/Examples.lean,Mathlib/CategoryTheory/LocallyCartesianClosed/Basic.lean,Mathlib/CategoryTheory/LocallyCartesianClosed/BeckChevalley.lean,docs/references.bib 8 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
407-47765
1 year ago
414-29692
414 days ago
0-17
17 seconds
21959 BGuillemet
author:BGuillemet
 feat(Topology/ContinuousMap): Stone-Weierstrass theorem for MvPolynomial Add the subalgebra of multivariate polynomials and prove it separates points, on the same model as `ContinuousMap/Polynomial.lean`. Prove the Stone-Weierstrass theorem and some variations for multivariate polynomials. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology new-contributor 285/1 Mathlib.lean,Mathlib/Topology/ContinuousMap/MvPolynomial.lean,Mathlib/Topology/ContinuousMap/StoneWeierstrass.lean 3 1 ['github-actions'] nobody
407-44107
1 year ago
407-44107
407 days ago
16-76141
16 days
19177 adomani
author:adomani
 test: the findDefEqAbuse linter This is a prototype, as per [this Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Locating.20defeq.20abuse) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict large-import 126/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter.lean,Mathlib/Tactic/Linter/FindDefEqAbuse.lean,MathlibTest/FindDefEqAbuse.lean 5 1 ['github-actions'] nobody
405-46120
1 year ago
unknown
0-0
0 seconds
22359 adomani
author:adomani
 feat(whitespace): do not allow indented doc-strings In a doc-string, Do not allow the first character after the first line break to be a space. --- There are approximately 2.5k exceptions. I think that they should be unindented, judging from the sample that I looked at, but won't act on it, unless there is a clear plan to fix and merge this modification! --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-linter large-import 222/70 Archive/Wiedijk100Theorems/BuffonsNeedle.lean,Mathlib.lean,Mathlib/Algebra/Module/SpanRank.lean,Mathlib/AlgebraicTopology/SimplicialSet/NerveAdjunction.lean,Mathlib/Analysis/Asymptotics/ExpGrowth.lean,Mathlib/Data/Matroid/Circuit.lean,Mathlib/Init.lean,Mathlib/Lean/Meta/RefinedDiscrTree/Encode.lean,Mathlib/LinearAlgebra/Dimension/StrongRankCondition.lean,Mathlib/LinearAlgebra/LinearIndependent/Basic.lean,Mathlib/LinearAlgebra/LinearIndependent/Defs.lean,Mathlib/Tactic.lean,Mathlib/Tactic/FunProp/Decl.lean,Mathlib/Tactic/FunProp/Theorems.lean,Mathlib/Tactic/Linter.lean,Mathlib/Tactic/Linter/DocString.lean,Mathlib/Topology/Path.lean,Mathlib/Topology/UnitInterval.lean,MathlibTest/LintDocstring.lean,lakefile.lean 20 1 ['github-actions'] nobody
405-45039
1 year ago
413-71128
413 days ago
0-2574
42 minutes
18470 astrainfinita
author:astrainfinita
 perf: lower the priority of `Normed*.to*` instances --- From #7873. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict slow-typeclass-synthesis t-algebra t-analysis
label:t-algebra$
 28/0 Mathlib/Analysis/Normed/Field/Basic.lean,Mathlib/Analysis/Normed/Group/Basic.lean 2 9 ['astrainfinita', 'github-actions', 'jcommelin', 'leanprover-bot'] nobody
403-15534
1 year ago
403-15534
403 days ago
129-16341
129 days
17368 Felix-Weilacher
author:Felix-Weilacher
 feat(Topology/Baire/BaireMeasurable): add the Kuratowski-Ulam theorem Add the Kuratowski-Ulam theorem, which one can think of as a "Fubini" for Baire category. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology 187/1 Mathlib/MeasureTheory/MeasurableSpace/Basic.lean,Mathlib/Order/Filter/Basic.lean,Mathlib/Topology/Baire/BaireMeasurable.lean,Mathlib/Topology/Constructions.lean,Mathlib/Topology/GDelta/Basic.lean 5 6 ['Felix-Weilacher', 'github-actions', 'urkud'] nobody
401-39603
1 year ago
538-51122
538 days ago
22-48253
22 days
8767 eric-wieser
author:eric-wieser
 refactor(Cache): tidy lake-manifest parsing in Cache This now respects local copies of Mathlib dependencies (though in practice these invalidate the *online* cache because to point to local copies of Mathlib, the hash for `lakefile.lean` and `lake-manifest.json` is first invalidated). --- - [x] depends on: #11492 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta 49/49 Cache/Hashing.lean,Cache/IO.lean,lake-manifest.json 3 8 ['digama0', 'eric-wieser', 'github-actions', 'leanprover-community-mathlib4-bot'] nobody
400-15266
1 year ago
581-67616
581 days ago
119-35643
119 days
22434 qawbecrdtey
author:qawbecrdtey
 feat(Mathlib/Analysis/Normed/Lp/WithLp): Added more instances for `WithLp` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-analysis 51/22 Mathlib/Analysis/Normed/Lp/WithLp.lean 1 11 ['eric-wieser', 'github-actions', 'leanprover-bot', 'qawbecrdtey'] nobody
399-44705
1 year ago
406-13970
406 days ago
1-79072
1 day
15578 znssong
author:znssong
 feat(Function): Fixed points of function `f` with `f(x) >= x` We added some lemmas of fixed points of function `f` with `f(x) >= x`, where `f : α → α` is a function on a finite type `α`. This will be needed in proof of Bondy-Chvátal theorem. --- See also branch `meow-sister/BondyChvatal`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-analysis new-contributor 82/0 Mathlib.lean,Mathlib/Dynamics/FixedPoints/Basic.lean,Mathlib/Dynamics/FixedPoints/Increasing.lean 3 32 ['Ruben-VandeVelde', 'YaelDillies', 'github-actions', 'urkud', 'vihdzp', 'znssong'] nobody
399-39933
1 year ago
582-43162
582 days ago
29-48368
29 days
22660 Ruben-VandeVelde
author:Ruben-VandeVelde
 chore: follow naming convention around Group.IsNilpotent --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 133/67 Mathlib/GroupTheory/Frattini.lean,Mathlib/GroupTheory/Nilpotent.lean,Mathlib/GroupTheory/SpecificGroups/ZGroup.lean 3 1 ['github-actions'] nobody
395-66362
1 year ago
395-66362
395 days ago
10-48025
10 days
13999 adomani
author:adomani
 feat: a linter to flag potential confusing conventions Currently, the linter flags all uses of * `a - b` where `a b : Nat`; * `a / b` where `a b : Nat` or `a b : Int`; * `a / 0` more or less whenever the type of `a` has a `0` and a division. This comes up often when starting to use Lean and hopefully the flag can help mitigate initial confusions. When the local context contains the relevant inequality/divisibility hypothesis, the linter is quiet. A recent [Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/113489-new-members/topic/not.20understanding.20deliberate.20error.20with.20.60ring.60.20over.20.E2.84.95/near/445879310) --- To make sure that the linter does not produce errors, #14007 activates the linter on "all" of mathlib. The expectation is that no error is thrown, just warnings. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-linter awaiting-author 251/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/Papercut.lean,MathlibTest/Papercut.lean 4 24 ['Julian', 'YaelDillies', 'adomani', 'eric-wieser', 'github-actions'] nobody
395-11996
1 year ago
655-75887
655 days ago
7-47589
7 days
19013 quangvdao
author:quangvdao
 feat(Algebra/BigOperators/Fin): Add `finSigmaFinEquiv` This PR adds `finSigmaFinEquiv` which is the equivalence `(i : Fin m) × Fin (n i) ≃ Fin (∑ i, n i)`. This is the dependent version of `finProdFinEquiv`. CI should be passing, but there are two things I'd like feedback on: 1. When defining the mappings, I have to consider `m = 0` separately. Is there a more uniform definition? 2. I'm proving this as a step toward defining `Fin.join`, which is the analogue of `List.join`. I can now technically define `Fin.join` as: ``` variable {a : Fin n → ℕ} {α : (i : Fin n) → (j : Fin (a i)) → Sort*} def join (v : (i : Fin n) → (j : Fin (a i)) → α i j) (k : Fin (∑ i, a i)) : α (finSigmaFinEquiv.invFun k).1 (finSigmaFinEquiv.invFun k).2 := v (finSigmaFinEquiv.invFun k).1 (finSigmaFinEquiv.invFun k).2 ``` but this looks horrible. This highly motivates refactoring `invFun` as two new definitions: ``` def func1 {n : ℕ} (a : Fin n → ℕ) (k : Fin (∑ i, a i)) : Fin n := sorry def func2 {n : ℕ} (a : Fin n → ℕ) (k : Fin (∑ i, a i)) : Fin (a (func1 a k)) := sorry ``` I'm not sure what to call these functions. The analogues in the non-dependent case are `divNat` and `modNat`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 92/16 Mathlib/Algebra/BigOperators/Fin.lean 1 14 ['YaelDillies', 'eric-wieser', 'github-actions', 'quangvdao'] nobody
393-34029
1 year ago
515-11957
515 days ago
3-28829
3 days
20389 eric-wieser
author:eric-wieser
 feat: generalize results to `WithLp 0` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-analysis 116/53 Mathlib/Analysis/Normed/Lp/PiLp.lean 1 1 ['github-actions'] nobody
392-22577
1 year ago
unknown
0-0
0 seconds
19227 adomani
author:adomani
 fix(CI): unwrap `lake test` in problem matcher ... and also add a `#guard_msgs` in `AssertImported` test, so that `lake test` properly fails. [Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/CI.3A.20noisy.20.22test.20mathlib.22/near/483126955) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author CI 9/20 .github/build.in.yml,.github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build_fork.yml,MathlibTest/AssertImported.lean 5 2 ['bryangingechen', 'github-actions'] nobody
390-53065
1 year ago
491-7336
491 days ago
21-82868
21 days
15774 kkytola
author:kkytola
 feat: Topology on `ENat` This PR may contain some results that are not in the PR that adds a toppology on `ENat`. --- The immediate motivation is to be able to make the right continuity statement of the extended floor function on `ENNReal`, when this floor function is made `ENat`valued as suggested in the PR review of #15269. The API here is modelled on the early parts of [the corresponding ENNReal file](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Topology/Instances/ENNReal.html#top), although much of this case is more trivial. - [x] depends on: #15380 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-topology t-order 161/9 Mathlib/Data/ENat/Basic.lean,Mathlib/Topology/Instances/ENat.lean 2 4 ['YaelDillies', 'github-actions', 'leanprover-community-mathlib4-bot'] nobody
386-10597
1 year ago
611-40140
611 days ago
0-6819
1 hour
16009 Command-Master
author:Command-Master
 acyclic graph --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-combinatorics 232/0 Mathlib/Combinatorics/SimpleGraph/Acyclic.lean 1 1 ['github-actions'] nobody
384-45146
1 year ago
unknown
0-0
0 seconds
20222 eric-wieser
author:eric-wieser
 feat: generalize lemmas about derivatives Rather than creating a huge diff by shuffling things around, this generalizes everything in-place and swaps between `section`s for topological and normed vector spaces. The rationale for this approach is that: * we may further generalize the results of this file, and this avoids us jumbling up the order multiple times unnecessarily. * this greatly reduces the chance of merge conflicts --- - [ ] depends on: #21065 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-analysis 554/50 Mathlib/Analysis/Calculus/Deriv/Basic.lean,Mathlib/Analysis/Calculus/FDeriv/Basic.lean,MathlibTest/Recall.lean 3 8 ['adomani', 'eric-wieser', 'github-actions', 'leanprover-bot', 'mathlib4-dependent-issues-bot'] nobody
381-67265
1 year ago
444-12939
444 days ago
7-31913
7 days
21018 markimunro
author:markimunro
 feat(Data/Matrix): add file with key definitions and theorems about elementary row operations Prove that each elementary row operation is equivalent to a multiplication by an elementary matrix, has another row operation which inverts it, and that each elementary matrix has a left inverse. This is a very large PR and I understand it will take time. This is my first one and will likely have issues but I will be ready to answer questions/fix them as soon as possible. Co-authored-by: Christopher Lynch --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data enhancement new-contributor merge-conflict awaiting-author 1230/0 Mathlib.lean,Mathlib/Data/Matrix/ElementaryRowOperations.lean,Mathlib/Data/Matrix/GaussianElimination.lean,Mathlib/Data/Matrix/GaussianEliminationOld,Mathlib/Data/Matrix/oldnames,et --hard 18533caba32,lean-toolchain 7 17 ['chrisflav', 'eric-wieser', 'github-actions', 'j-loreaux', 'markimunro'] nobody
380-75332
1 year ago
406-17888
406 days ago
23-22681
23 days
23514 eric-wieser
author:eric-wieser
 refactor: smooth over Lattice/LinearOrder inheritance This fixes the forgetful inheritance in `CompleteLinearOrder` and `ConditionallyCompleteLinearOrder`, which previously did not carry `compare` fields. (edit: moved to #23515) The following is the inheritance diagram before, where the dotted lines are manual instances. Note that every lattice typeclass that extends `LinearOrder` has to implement another dotted line edge, and remember to copy all the necessary data fields. ```mermaid graph TD LinearOrder --> Min,Max; LinearOrder --> PartialOrder; Lattice --> PartialOrder; CompleteLinearOrder --> Lattice; ConditionallyCompleteLinearOrder --> Lattice; LinearOrder-.-> Lattice; CompleteLinearOrder -.-> LinearOrder; ConditionallyCompleteLinearOrder -.-> LinearOrder; ``` This change introduces two new auxiliary typeclasses, to encapsulate these troublesome edges. `LinearOrderedLattice` can be thought of as `LinearOrder`, but with `sup`/`inf` instead of `min`/`max`. This is crucial, because it ensures the duplicate fields are merged in `extends CompleteLattice X, LinearOrderedLattice X`, which would not be the case for `extends CompleteLattice X, LinearOrder X`. The result is: ```mermaid graph TD LinearOrder --> Min,Max; LinearOrder --> LinearOrderBase; LinearOrderBase --> PartialOrder; Lattice --> PartialOrder; LinearOrderedLattice -.-> LinearOrder; LinearOrderedLattice --> LinearOrderBase; LinearOrderedLattice --> Lattice; CompleteLinearOrder --> LinearOrderedLattice; ConditionallyCompleteLinearOrder --> LinearOrderedLattice; ``` --- - [ ] depends on: #23515 - [ ] [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 85/66 Mathlib/Algebra/Order/Group/Defs.lean,Mathlib/Algebra/Order/Monoid/Defs.lean,Mathlib/Order/Basic.lean,Mathlib/Order/CompleteLattice/Defs.lean,Mathlib/Order/ConditionallyCompleteLattice/Defs.lean,Mathlib/Order/Defs/LinearOrder.lean,Mathlib/Order/Lattice.lean 7 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
380-14762
1 year ago
381-18919
381 days ago
0-949
15 minutes
20746 JLimperg
author:JLimperg
 Aesop forward branch test --- This is not a real PR; I just want to benchmark this Aesop branch. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 14/6 .github/workflows/build.yml,Mathlib/Data/Nat/Prime/Defs.lean,lake-manifest.json,lakefile.lean,scripts/bench/fake-root/lib/lean/libleanshared.so,scripts/bench/run 6 11 ['JLimperg', 'Kha', 'github-actions', 'leanprover-bot'] nobody
379-58568
1 year ago
unknown
0-0
0 seconds
22810 pechersky
author:pechersky
 feat(Counterexamples): metric space not induced by norm Because the distance is not homogeneous --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #22845 merge-conflict WIP t-topology t-analysis 202/1 Counterexamples.lean,Counterexamples/NotBoundedSMulMetricSpace.lean,Mathlib.lean,Mathlib/Analysis/Normed/PiNat.lean,Mathlib/Topology/Algebra/Module/LocallyConvex.lean,Mathlib/Topology/MetricSpace/Polish.lean 6 21 ['eric-wieser', 'github-actions', 'loefflerd', 'mathlib4-dependent-issues-bot', 'pechersky'] nobody
379-51224
1 year ago
394-84715
394 days ago
0-83153
23 hours
13124 astrainfinita
author:astrainfinita
 chore: remove `CovariantClass` and `ContravariantClass` Lean cannot handle `CovariantClass` and `ContravariantClass` correctly - TC slowness - [Zulip](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/TC.20slowness) - https://github.com/leanprover-community/mathlib4/issues/6646#issuecomment-1691792488 - It may also have made #6326 fail. - Needs a weird hack to find instance: #9252 --- - [x] depends on: #13154 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 602/486 Mathlib/Algebra/AddConstMap/Basic.lean,Mathlib/Algebra/Algebra/Operations.lean,Mathlib/Algebra/Algebra/Subalgebra/Pointwise.lean,Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean,Mathlib/Algebra/BigOperators/Group/Multiset/Basic.lean,Mathlib/Algebra/Group/Subgroup/Pointwise.lean,Mathlib/Algebra/Group/Submonoid/Pointwise.lean,Mathlib/Algebra/Group/UniqueProds/Basic.lean,Mathlib/Algebra/Module/Submodule/Pointwise.lean,Mathlib/Algebra/MonoidAlgebra/Degree.lean,Mathlib/Algebra/Order/AddTorsor.lean,Mathlib/Algebra/Order/Group/Action.lean,Mathlib/Algebra/Order/Group/DenselyOrdered.lean,Mathlib/Algebra/Order/Group/Units.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/GroupWithZero/Unbundled.lean,Mathlib/Algebra/Order/GroupWithZero/WithZero.lean,Mathlib/Algebra/Order/Monoid/Defs.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Basic.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Defs.lean,Mathlib/Algebra/Order/Monoid/Unbundled/OrderDual.lean,Mathlib/Algebra/Order/Monoid/Unbundled/WithTop.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Order/Ring/WithTop.lean,Mathlib/Algebra/Ring/Subring/Pointwise.lean,Mathlib/Algebra/Ring/Subsemiring/Pointwise.lean,Mathlib/Analysis/SumOverResidueClass.lean,Mathlib/Data/DFinsupp/Lex.lean,Mathlib/Data/Finsupp/Lex.lean,Mathlib/Data/NNRat/Defs.lean,Mathlib/GroupTheory/OrderOfElement.lean,Mathlib/Order/Filter/IsBounded.lean,Mathlib/Order/Filter/Pointwise.lean,Mathlib/Probability/Kernel/Defs.lean,Mathlib/RingTheory/Ideal/Pointwise.lean,Mathlib/RingTheory/Valuation/ValuationSubring.lean,Mathlib/Topology/Algebra/Order/LiminfLimsup.lean 37 6 ['MichaelStollBayreuth', 'astrainfinita', 'github-actions', 'leanprover-bot', 'mathlib4-dependent-issues-bot'] nobody
378-79201
1 year ago
unknown
0-0
0 seconds
15212 victorliu5296
author:victorliu5296
 feat: Add fundamental theorem of calculus-2 for Banach spaces add the Mean Value Theorem for Banach spaces to the library and include reference for the theorem statement This theorem states that if `f : X → Y` is differentiable along the line segment from `a` to `b`, then the change in `f` equals the integral of its derivative along this path. This extends the mean value theorem to Banach spaces. This can be used for the eventual proof of the Newton-Kantorovich theorem with 1 constant contained inside the added reference. Here is the discussion on Zulipchat: https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Contributing.20FTC-2.20for.20Banach.20spaces t-measure-probability new-contributor merge-conflict awaiting-author t-analysis 60/1 Mathlib/MeasureTheory/Integral/FundThmCalculus.lean 1 3 ['github-actions', 'hrmacbeth', 'victorliu5296'] nobody
375-70321
1 year ago
569-47692
569 days ago
51-85104
51 days
22888 plp127
author:plp127
 perf: replace `Lean.Expr.swapBVars` with a better? implementation Replaces `Lean.Expr.swapBVars` with a version that traverses the expression. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-meta 14/12 Mathlib/Tactic/FunProp/ToBatteries.lean 1 23 ['eric-wieser', 'github-actions', 'joneugster', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'plp127'] eric-wieser and joneugster
assignee:eric-wieser assignee:joneugster
374-63366
1 year ago
395-26806
395 days ago
4-80306
4 days
15943 urkud
author:urkud
 feat: add `ProdQuotientMapSpace` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology 731/11 Mathlib.lean,Mathlib/Topology/Basic.lean,Mathlib/Topology/Compactness/Compact.lean,Mathlib/Topology/Maps/ProdQuotient.lean 4 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
374-2293
1 year ago
unknown
0-0
0 seconds
22579 kvanvels
author:kvanvels
 doc(Topology/Defs/Induced): fix comments on three functions related to RestrictGenTopology --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology documentation awaiting-author 10/9 Mathlib/Topology/Defs/Induced.lean,Mathlib/Topology/RestrictGen.lean 2 4 ['github-actions', 'kvanvels', 'leanprover-community-bot-assistant', 'urkud'] nobody
372-77224
1 year ago
395-81601
395 days ago
12-18667
12 days
19771 robertylewis
author:robertylewis
 perf: qqify two functions in linarith --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta 17/24 Mathlib/Tactic/Linarith/Frontend.lean,Mathlib/Tactic/Linarith/Verification.lean 2 5 ['github-actions', 'grunweg', 'leanprover-bot', 'leanprover-community-bot-assistant', 'robertylewis'] nobody
372-56730
1 year ago
unknown
0-0
0 seconds
22308 plp127
author:plp127
 feat (Analysis/Convex): Generalize `Convex` lemmas to `StarConvex` This PR generalizes many lemmas assuming `Convex 𝕜 s` to assume `StarConvex 𝕜 0 s`. --- - [x] depends on: #22421 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-analysis new-contributor 30/18 Mathlib/Analysis/Convex/Gauge.lean,Mathlib/Analysis/Convex/GaugeRescale.lean,Mathlib/Analysis/Convex/Star.lean,Mathlib/Analysis/LocallyConvex/AbsConvexOpen.lean 4 5 ['Paul-Lez', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
372-56241
1 year ago
unknown
0-0
0 seconds
21488 imbrem
author:imbrem
 feat(CategoryTheory/Monoidal): premonoidal categories Add support for premonoidal categories --- Still want to add support for: - Premonoidal braided/symmetric categories - The monoidal coherence theorem, which I've already ported in my `discretion` library - The `coherence` tactic, which should work fine for premonoidal categories too but wanted to get this in front of reviewers ASAP to make sure my general approach was alright [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory new-contributor 900/361 Mathlib/Algebra/Category/ModuleCat/Presheaf/Monoidal.lean,Mathlib/CategoryTheory/Bicategory/End.lean,Mathlib/CategoryTheory/GradedObject/Monoidal.lean,Mathlib/CategoryTheory/Localization/Monoidal.lean,Mathlib/CategoryTheory/Monoidal/Braided/Basic.lean,Mathlib/CategoryTheory/Monoidal/Category.lean,Mathlib/CategoryTheory/Monoidal/Center.lean,Mathlib/CategoryTheory/Monoidal/CoherenceLemmas.lean,Mathlib/CategoryTheory/Monoidal/Discrete.lean,Mathlib/CategoryTheory/Monoidal/End.lean,Mathlib/CategoryTheory/Monoidal/Free/Basic.lean,Mathlib/CategoryTheory/Monoidal/Functor.lean,Mathlib/CategoryTheory/Monoidal/FunctorCategory.lean,Mathlib/CategoryTheory/Monoidal/Mon_.lean,Mathlib/CategoryTheory/Monoidal/Opposite.lean,Mathlib/CategoryTheory/Monoidal/Transport.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Datatypes.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Normalize.lean,Mathlib/Tactic/CategoryTheory/Monoidal/PureCoherence.lean,Mathlib/Tactic/CategoryTheory/MonoidalComp.lean,MathlibTest/StringDiagram.lean 21 9 ['YaelDillies', 'github-actions', 'grunweg', 'imbrem', 'kim-em', 'leanprover-community-bot-assistant'] nobody
372-52509
1 year ago
372-52510
372 days ago
57-47357
57 days
21525 sinhp
author:sinhp
 feat(CategoryTheory): Locally Cartesian Closed Categories (Prelim) This PR defines the basic preliminaries for defining locally cartesian closed categories (LCCCs). In particular, using the calculus of mates we define certain natural isomorphisms involving `Over.star` and `Over.pullback` which will be crucial in defining the right adjoint to the pullback functor in the development of LCCCs. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory large-import 338/24 Mathlib/CategoryTheory/Comma/Over/Basic.lean,Mathlib/CategoryTheory/Comma/Over/Pullback.lean,Mathlib/CategoryTheory/Galois/Examples.lean 3 13 ['b-mehta', 'github-actions', 'joelriou', 'leanprover-community-bot-assistant', 'sinhp'] nobody
372-52507
1 year ago
372-52509
372 days ago
36-69400
36 days
22319 sinhp
author:sinhp
 feat(CategoryTheory): Locally Cartesian Closed Categories (Sections Right Adjoint) we define the `Over.sections` functor in the file `CategoryTheory.Comma.Over.Sections` and prove that it is a right adjoint to the `Over.star`, thereby solving an existing TODO in `Over.pullback` file. The `sections` functor is used to define the right adjoint to the pullback functor `Over.pullback` in the development of LCCCs. Moreover, the rest of added lemmas and theorems to `CategoryTheory.Comma.Over.Pullback` are crucial for the development of LCCCs in the next PR. --- - [ ] depends on: #21525 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-category-theory large-import 547/24 Mathlib.lean,Mathlib/CategoryTheory/Comma/Over/Basic.lean,Mathlib/CategoryTheory/Comma/Over/Pullback.lean,Mathlib/CategoryTheory/Comma/Over/Sections.lean,Mathlib/CategoryTheory/Galois/Examples.lean 5 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
372-51980
1 year ago
414-56015
414 days ago
0-2084
34 minutes
22321 sinhp
author:sinhp
 feat(CategoryTheory): Locally Cartesian Closed Categories (Definition) This PR defines locally cartesian closed categories in terms of existence of the pushforward functors (right adjoint to the pullback functor) for all morphisms. We develop basic API and prove the following: 1. Existence of the pushforward functors is equivalent to cartesian closed slices. 2. Any locally cartesian closed category with a terminal object is cartesian closed. 3. The slices of a locally cartesian closed category are locally cartesian closed. Some of the content is based on the project of formalization of polynomial functors at the Trimester "Prospect of Formal Mathematics" at the Hausdorff Institute (HIM) in Bonn. https://github.com/sinhp/Poly I found this implementation of locally cartesian closed categories amenable to polynomial functors formalization. Co-authored-by: Emily Riehl --- - [ ] depends on: #21525 - [ ] depends on: #22319 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-category-theory large-import 812/24 Mathlib.lean,Mathlib/CategoryTheory/Comma/Over/Basic.lean,Mathlib/CategoryTheory/Comma/Over/Pullback.lean,Mathlib/CategoryTheory/Comma/Over/Sections.lean,Mathlib/CategoryTheory/Galois/Examples.lean,Mathlib/CategoryTheory/LocallyCartesianClosed/Basic.lean 6 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
372-51980
1 year ago
414-54756
414 days ago
0-336
5 minutes
13653 adomani
author:adomani
 feat: the unusedSetOptionIn linter --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-linter large-import 199/0 Mathlib.lean,Mathlib/Algebra/Homology/HomotopyCategory/Triangulated.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter.lean,Mathlib/Tactic/Linter/UnnecessarySetOptionIn.lean,MathlibTest/UnnecessarySetOptionIn.lean 6 15 ['adomani', 'github-actions', 'grunweg', 'leanprover-community-bot-assistant'] nobody
371-83345
1 year ago
unknown
0-0
0 seconds
19425 hrmacbeth
author:hrmacbeth
 perf: gcongr forward-reasoning adjustment This PR changes the "forward-reasoning" component of `gcongr`, rendering it more efficient, particularly in problems with a large number of variables/hypotheses in the context. Previously `gcongr` attempted to match *every* `LocalDecl` against *every* node in the parse tree using *each* of the five implemented `@[gcongr_forward]` mini-tactics: matching directly, matching after applying `symm`, matching after applying `le_of_lt`, etc etc. The new algorithm filters out the non-Prop `LocalDecl`s, and also adjusts the `@[gcongr_forward]` extensions so that, rather than re-apply the relevant lemmas (`symm`, `le_of_lt`, etc) at every node in the parse tree, the lemmas are applied in advance to the `LocalDecl`s and the result (if successful) stored. The performance effect on mathlib as a whole is miniscule, but it speeds up the profiler's count of "tactic execution of Mathlib.Tactic.GCongr" in the newly-added test from 257 ms to 47 ms, and has a similar effect on real-life examples in an analysis project of mine. Co-authored-by: Mario Carneiro --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) (Note that Mario provided the ideas but not the code, so please review with appropriate diligence!) merge-conflict awaiting-author 130/59 Mathlib/Order/Lattice.lean,Mathlib/Tactic/GCongr/Core.lean,Mathlib/Tactic/GCongr/ForwardAttr.lean,MathlibTest/GCongr/inequalities.lean 4 17 ['Vierkantor', 'github-actions', 'hrmacbeth', 'leanprover-bot', 'leanprover-community-bot-assistant'] Vierkantor
assignee:Vierkantor
371-65041
1 year ago
504-53458
504 days ago
1-41769
1 day
20873 vbeffara
author:vbeffara
 feat(Topology/Covering): path lifting and homotopy lifting This proves the existence and uniqueness of path and homotopy lifts through covering maps. --- I tried to separate as much of the proof as possible into separate PRs (which are already in Mathlib now), but the proof here relies on a monolithic construction of an explicit lift along a well-chosen subdivision, in `partial_lift`, with associated definitions. Only one standalone lean file added. An older WIP PR #10084 by Junyan Xu @alreadydone proves similar results using a very similar construction for path lifting, with a different argument to obtain continuity for homotopy lifting. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-topology new-contributor 281/1 Mathlib.lean,Mathlib/Topology/Covering/Basic.lean,Mathlib/Topology/Covering/Lift.lean 3 9 ['alreadydone', 'github-actions', 'grunweg', 'vbeffara'] nobody
371-55237
1 year ago
446-47437
446 days ago
5-6208
5 days
22817 peabrainiac
author:peabrainiac
 feat(CategoryTheory/Sites): local sites Defines local sites and shows that sheaves of types on them form a local topos, in that the global sections functor `Sheaf.Γ` has a right adjoint `Sheaf.codisc` that is fully faithful. --- - [x] depends on: #22816 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-category-theory 263/0 Mathlib.lean,Mathlib/CategoryTheory/Limits/FunctorCategory/Shapes/Products.lean,Mathlib/CategoryTheory/Limits/Types.lean,Mathlib/CategoryTheory/Sites/GlobalSections.lean,Mathlib/CategoryTheory/Sites/LocalSite.lean,Mathlib/CategoryTheory/Sites/Sheaf.lean 6 4 ['github-actions', 'joelriou', 'mathlib4-dependent-issues-bot'] nobody
370-75246
1 year ago
401-76745
401 days ago
0-568
9 minutes
24040 astrainfinita
author:astrainfinita
 refactor: unbundle algebra from `(NonUnital){Seminormed, Normed}(Comm)Ring` --- - [ ] depends on: #23966 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra blocked-by-other-PR merge-conflict slow-typeclass-synthesis t-analysis
label:t-algebra$
 3775/3674 Archive/Imo/Imo1998Q2.lean,Counterexamples/LinearOrderWithPosMulPosEqZero.lean,Mathlib/Algebra/Algebra/RestrictScalars.lean,Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Algebra/Module/ZLattice/Covolume.lean,Mathlib/Algebra/Order/Field/Canonical.lean,Mathlib/Algebra/Order/Field/Rat.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/GroupWithZero/Finset.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Order/Nonneg/Field.lean,Mathlib/Algebra/Order/Nonneg/Ring.lean,Mathlib/Algebra/Order/Ring/Nat.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/Analytic/CPolynomial.lean,Mathlib/Analysis/Analytic/CPolynomialDef.lean,Mathlib/Analysis/Analytic/ChangeOrigin.lean,Mathlib/Analysis/Analytic/Composition.lean,Mathlib/Analysis/Analytic/Constructions.lean,Mathlib/Analysis/Analytic/Inverse.lean,Mathlib/Analysis/Analytic/IsolatedZeros.lean,Mathlib/Analysis/Analytic/IteratedFDeriv.lean,Mathlib/Analysis/Analytic/Linear.lean,Mathlib/Analysis/Analytic/OfScalars.lean,Mathlib/Analysis/Analytic/Order.lean,Mathlib/Analysis/Analytic/Polynomial.lean,Mathlib/Analysis/Analytic/RadiusLiminf.lean,Mathlib/Analysis/Analytic/Uniqueness.lean,Mathlib/Analysis/Analytic/Within.lean,Mathlib/Analysis/Asymptotics/AsymptoticEquivalent.lean,Mathlib/Analysis/Asymptotics/Defs.lean,Mathlib/Analysis/Asymptotics/Lemmas.lean,Mathlib/Analysis/Asymptotics/SpecificAsymptotics.lean,Mathlib/Analysis/Asymptotics/TVS.lean,Mathlib/Analysis/Asymptotics/Theta.lean,Mathlib/Analysis/BoundedVariation.lean,Mathlib/Analysis/BoxIntegral/Basic.lean,Mathlib/Analysis/BoxIntegral/DivergenceTheorem.lean,Mathlib/Analysis/BoxIntegral/Integrability.lean,Mathlib/Analysis/BoxIntegral/Partition/Additive.lean,Mathlib/Analysis/BoxIntegral/Partition/Measure.lean,Mathlib/Analysis/CStarAlgebra/Basic.lean,Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/CStarAlgebra/Classes.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Basic.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Instances.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Integral.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Isometric.lean,Mathlib/Analysis/CStarAlgebra/ContinuousLinearMap.lean,Mathlib/Analysis/CStarAlgebra/ContinuousMap.lean,Mathlib/Analysis/CStarAlgebra/Exponential.lean,Mathlib/Analysis/CStarAlgebra/GelfandDuality.lean,Mathlib/Analysis/CStarAlgebra/Matrix.lean,Mathlib/Analysis/CStarAlgebra/Module/Constructions.lean,Mathlib/Analysis/CStarAlgebra/Module/Defs.lean,Mathlib/Analysis/CStarAlgebra/Multiplier.lean,Mathlib/Analysis/CStarAlgebra/Spectrum.lean,Mathlib/Analysis/CStarAlgebra/Unitization.lean,Mathlib/Analysis/CStarAlgebra/lpSpace.lean,Mathlib/Analysis/Calculus/AddTorsor/AffineMap.lean,Mathlib/Analysis/Calculus/AddTorsor/Coord.lean,Mathlib/Analysis/Calculus/BumpFunction/Basic.lean,Mathlib/Analysis/Calculus/BumpFunction/Convolution.lean,Mathlib/Analysis/Calculus/BumpFunction/FiniteDimension.lean,Mathlib/Analysis/Calculus/BumpFunction/InnerProduct.lean,Mathlib/Analysis/Calculus/BumpFunction/Normed.lean,Mathlib/Analysis/Calculus/Conformal/InnerProduct.lean,Mathlib/Analysis/Calculus/Conformal/NormedSpace.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Bounds.lean,Mathlib/Analysis/Calculus/ContDiff/CPolynomial.lean,Mathlib/Analysis/Calculus/ContDiff/Defs.lean,Mathlib/Analysis/Calculus/ContDiff/FTaylorSeries.lean,Mathlib/Analysis/Calculus/ContDiff/FaaDiBruno.lean,Mathlib/Analysis/Calculus/ContDiff/FiniteDimension.lean,Mathlib/Analysis/Calculus/ContDiff/Operations.lean,Mathlib/Analysis/Calculus/ContDiff/RCLike.lean,Mathlib/Analysis/Calculus/ContDiff/WithLp.lean,Mathlib/Analysis/Calculus/DSlope.lean,Mathlib/Analysis/Calculus/Deriv/Abs.lean,Mathlib/Analysis/Calculus/Deriv/Add.lean,Mathlib/Analysis/Calculus/Deriv/AffineMap.lean,Mathlib/Analysis/Calculus/Deriv/Basic.lean,Mathlib/Analysis/Calculus/Deriv/Comp.lean,Mathlib/Analysis/Calculus/Deriv/Inv.lean,Mathlib/Analysis/Calculus/Deriv/Inverse.lean,Mathlib/Analysis/Calculus/Deriv/Linear.lean,Mathlib/Analysis/Calculus/Deriv/Mul.lean,Mathlib/Analysis/Calculus/Deriv/Prod.lean,Mathlib/Analysis/Calculus/Deriv/Shift.lean,Mathlib/Analysis/Calculus/Deriv/Slope.lean,Mathlib/Analysis/Calculus/Deriv/Star.lean,Mathlib/Analysis/Calculus/Deriv/Support.lean,Mathlib/Analysis/Calculus/Deriv/ZPow.lean,Mathlib/Analysis/Calculus/DiffContOnCl.lean,Mathlib/Analysis/Calculus/FDeriv/Add.lean,Mathlib/Analysis/Calculus/FDeriv/Analytic.lean,Mathlib/Analysis/Calculus/FDeriv/Basic.lean,Mathlib/Analysis/Calculus/FDeriv/Bilinear.lean 630 5 ['astrainfinita', 'github-actions', 'leanprover-bot', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
367-45940
1 year ago
unknown
0-0
0 seconds
16314 astrainfinita
author:astrainfinita
 chore(Data/Quot): deprecate `ind*'` APIs --- - [x] depends on: #16264 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 247/287 Counterexamples/CliffordAlgebraNotInjective.lean,Mathlib/Algebra/Colimit/Module.lean,Mathlib/Algebra/Lie/Quotient.lean,Mathlib/Algebra/Module/Torsion.lean,Mathlib/Algebra/RingQuot.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Angle.lean,Mathlib/CategoryTheory/ConnectedComponents.lean,Mathlib/CategoryTheory/Subobject/Basic.lean,Mathlib/CategoryTheory/Subobject/FactorThru.lean,Mathlib/CategoryTheory/Subobject/Lattice.lean,Mathlib/Computability/Reduce.lean,Mathlib/Computability/Tape.lean,Mathlib/Data/List/Cycle.lean,Mathlib/Data/Multiset/MapFold.lean,Mathlib/Data/Multiset/ZeroCons.lean,Mathlib/Data/Quot.lean,Mathlib/Data/Setoid/Basic.lean,Mathlib/Data/Setoid/Partition.lean,Mathlib/FieldTheory/Fixed.lean,Mathlib/GroupTheory/Complement.lean,Mathlib/GroupTheory/Congruence/Basic.lean,Mathlib/GroupTheory/Congruence/Defs.lean,Mathlib/GroupTheory/Congruence/Hom.lean,Mathlib/GroupTheory/Coset/Basic.lean,Mathlib/GroupTheory/Coset/Defs.lean,Mathlib/GroupTheory/FreeAbelianGroup.lean,Mathlib/GroupTheory/GroupAction/Basic.lean,Mathlib/GroupTheory/GroupAction/Defs.lean,Mathlib/GroupTheory/GroupAction/Quotient.lean,Mathlib/GroupTheory/Index.lean,Mathlib/GroupTheory/MonoidLocalization/Basic.lean,Mathlib/GroupTheory/PGroup.lean,Mathlib/GroupTheory/Perm/Cycle/Concrete.lean,Mathlib/GroupTheory/PresentedGroup.lean,Mathlib/GroupTheory/QuotientGroup/Basic.lean,Mathlib/GroupTheory/QuotientGroup/Defs.lean,Mathlib/GroupTheory/SchurZassenhaus.lean,Mathlib/GroupTheory/Sylow.lean,Mathlib/LinearAlgebra/Alternating/DomCoprod.lean,Mathlib/LinearAlgebra/Projectivization/Basic.lean,Mathlib/LinearAlgebra/Quotient/Basic.lean,Mathlib/LinearAlgebra/Quotient/Defs.lean,Mathlib/MeasureTheory/Function/AEEqFun.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/NumberTheory/RamificationInertia/Basic.lean,Mathlib/Order/Antisymmetrization.lean,Mathlib/Order/Category/PartOrd.lean,Mathlib/Order/Filter/Germ/Basic.lean,Mathlib/RepresentationTheory/GroupCohomology/Hilbert90.lean,Mathlib/RingTheory/AdicCompletion/Algebra.lean,Mathlib/RingTheory/AdicCompletion/Basic.lean,Mathlib/RingTheory/AdicCompletion/Functoriality.lean,Mathlib/RingTheory/AdjoinRoot.lean,Mathlib/RingTheory/Congruence/Basic.lean,Mathlib/RingTheory/Flat/FaithfullyFlat/Basic.lean,Mathlib/RingTheory/GradedAlgebra/HomogeneousLocalization.lean,Mathlib/RingTheory/Ideal/Cotangent.lean,Mathlib/RingTheory/Ideal/Norm/AbsNorm.lean,Mathlib/RingTheory/Ideal/Quotient/Basic.lean,Mathlib/RingTheory/Ideal/Quotient/Defs.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/Valuation/Quotient.lean,Mathlib/Topology/Algebra/Group/TopologicalAbelianization.lean,Mathlib/Topology/Algebra/InfiniteSum/Module.lean,Mathlib/Topology/Separation/Basic.lean 65 4 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
366-77473
1 year ago
366-77475
366 days ago
55-36935
55 days
23509 eric-wieser
author:eric-wieser
 refactor: Make ENNReal an abbrev The `Coe` instance becomes `CoeTC` to match what we do for `WithTop` (such that the priority kicks in) Probably we could have both copies and things would be ok. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) This includes part of #23750 merge-conflict t-data 22/66 Mathlib/Data/ENNReal/Basic.lean,Mathlib/Data/ENNReal/BigOperators.lean,Mathlib/Data/ENNReal/Operations.lean,Mathlib/MeasureTheory/Integral/SetToL1.lean,Mathlib/MeasureTheory/Measure/Sub.lean,Mathlib/MeasureTheory/Measure/TightNormed.lean,Mathlib/Topology/MetricSpace/PartitionOfUnity.lean 7 22 ['eric-wieser', 'github-actions', 'leanprover-bot', 'leanprover-community-bot-assistant', 'leanprover-community-mathlib4-bot', 'mattrobball', 'urkud'] nobody
366-61126
1 year ago
368-26525
368 days ago
5-26623
5 days
24060 eric-wieser
author:eric-wieser
 chore(MeasureTheory): use `0` instead of `const _ 0` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-measure-probability 30/20 Mathlib/MeasureTheory/Function/SimpleFunc.lean,Mathlib/MeasureTheory/Function/SimpleFuncDense.lean,Mathlib/MeasureTheory/Function/SimpleFuncDenseLp.lean,Mathlib/MeasureTheory/Integral/Bochner/VitaliCaratheodory.lean,Mathlib/MeasureTheory/Integral/Lebesgue/Countable.lean,Mathlib/MeasureTheory/Integral/SetToL1.lean,Mathlib/Probability/StrongLaw.lean 7 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
366-50821
1 year ago
unknown
0-0
0 seconds
24058 astrainfinita
author:astrainfinita
 refactor: unbundle algebra from `*NormedField` --- - [ ] depends on: #24040 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra blocked-by-other-PR merge-conflict slow-typeclass-synthesis t-analysis
label:t-algebra$
 4602/4346 Archive/Hairer.lean,Archive/Imo/Imo1998Q2.lean,Counterexamples/LinearOrderWithPosMulPosEqZero.lean,Mathlib/Algebra/Algebra/RestrictScalars.lean,Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Algebra/Module/ZLattice/Covolume.lean,Mathlib/Algebra/Order/Field/Canonical.lean,Mathlib/Algebra/Order/Field/Rat.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/GroupWithZero/Finset.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Order/Nonneg/Field.lean,Mathlib/Algebra/Order/Nonneg/Ring.lean,Mathlib/Algebra/Order/Ring/Nat.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/Analytic/CPolynomial.lean,Mathlib/Analysis/Analytic/CPolynomialDef.lean,Mathlib/Analysis/Analytic/ChangeOrigin.lean,Mathlib/Analysis/Analytic/Composition.lean,Mathlib/Analysis/Analytic/Constructions.lean,Mathlib/Analysis/Analytic/Inverse.lean,Mathlib/Analysis/Analytic/IsolatedZeros.lean,Mathlib/Analysis/Analytic/IteratedFDeriv.lean,Mathlib/Analysis/Analytic/Linear.lean,Mathlib/Analysis/Analytic/OfScalars.lean,Mathlib/Analysis/Analytic/Order.lean,Mathlib/Analysis/Analytic/Polynomial.lean,Mathlib/Analysis/Analytic/RadiusLiminf.lean,Mathlib/Analysis/Analytic/Uniqueness.lean,Mathlib/Analysis/Analytic/Within.lean,Mathlib/Analysis/Asymptotics/AsymptoticEquivalent.lean,Mathlib/Analysis/Asymptotics/Defs.lean,Mathlib/Analysis/Asymptotics/Lemmas.lean,Mathlib/Analysis/Asymptotics/SpecificAsymptotics.lean,Mathlib/Analysis/Asymptotics/SuperpolynomialDecay.lean,Mathlib/Analysis/Asymptotics/TVS.lean,Mathlib/Analysis/Asymptotics/Theta.lean,Mathlib/Analysis/BoundedVariation.lean,Mathlib/Analysis/BoxIntegral/Basic.lean,Mathlib/Analysis/BoxIntegral/DivergenceTheorem.lean,Mathlib/Analysis/BoxIntegral/Integrability.lean,Mathlib/Analysis/BoxIntegral/Partition/Additive.lean,Mathlib/Analysis/BoxIntegral/Partition/Measure.lean,Mathlib/Analysis/CStarAlgebra/Basic.lean,Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/CStarAlgebra/Classes.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Basic.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Instances.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Integral.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Isometric.lean,Mathlib/Analysis/CStarAlgebra/ContinuousLinearMap.lean,Mathlib/Analysis/CStarAlgebra/ContinuousMap.lean,Mathlib/Analysis/CStarAlgebra/Exponential.lean,Mathlib/Analysis/CStarAlgebra/GelfandDuality.lean,Mathlib/Analysis/CStarAlgebra/Matrix.lean,Mathlib/Analysis/CStarAlgebra/Module/Constructions.lean,Mathlib/Analysis/CStarAlgebra/Module/Defs.lean,Mathlib/Analysis/CStarAlgebra/Multiplier.lean,Mathlib/Analysis/CStarAlgebra/Spectrum.lean,Mathlib/Analysis/CStarAlgebra/Unitization.lean,Mathlib/Analysis/CStarAlgebra/lpSpace.lean,Mathlib/Analysis/Calculus/AddTorsor/AffineMap.lean,Mathlib/Analysis/Calculus/AddTorsor/Coord.lean,Mathlib/Analysis/Calculus/BumpFunction/Basic.lean,Mathlib/Analysis/Calculus/BumpFunction/Convolution.lean,Mathlib/Analysis/Calculus/BumpFunction/FiniteDimension.lean,Mathlib/Analysis/Calculus/BumpFunction/InnerProduct.lean,Mathlib/Analysis/Calculus/BumpFunction/Normed.lean,Mathlib/Analysis/Calculus/Conformal/InnerProduct.lean,Mathlib/Analysis/Calculus/Conformal/NormedSpace.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Bounds.lean,Mathlib/Analysis/Calculus/ContDiff/CPolynomial.lean,Mathlib/Analysis/Calculus/ContDiff/Defs.lean,Mathlib/Analysis/Calculus/ContDiff/FTaylorSeries.lean,Mathlib/Analysis/Calculus/ContDiff/FaaDiBruno.lean,Mathlib/Analysis/Calculus/ContDiff/FiniteDimension.lean,Mathlib/Analysis/Calculus/ContDiff/Operations.lean,Mathlib/Analysis/Calculus/ContDiff/RCLike.lean,Mathlib/Analysis/Calculus/ContDiff/WithLp.lean,Mathlib/Analysis/Calculus/DSlope.lean,Mathlib/Analysis/Calculus/Deriv/Abs.lean,Mathlib/Analysis/Calculus/Deriv/Add.lean,Mathlib/Analysis/Calculus/Deriv/AffineMap.lean,Mathlib/Analysis/Calculus/Deriv/Basic.lean,Mathlib/Analysis/Calculus/Deriv/Comp.lean,Mathlib/Analysis/Calculus/Deriv/Inv.lean,Mathlib/Analysis/Calculus/Deriv/Inverse.lean,Mathlib/Analysis/Calculus/Deriv/Linear.lean,Mathlib/Analysis/Calculus/Deriv/Mul.lean,Mathlib/Analysis/Calculus/Deriv/Pi.lean,Mathlib/Analysis/Calculus/Deriv/Polynomial.lean,Mathlib/Analysis/Calculus/Deriv/Pow.lean,Mathlib/Analysis/Calculus/Deriv/Prod.lean,Mathlib/Analysis/Calculus/Deriv/Shift.lean,Mathlib/Analysis/Calculus/Deriv/Slope.lean,Mathlib/Analysis/Calculus/Deriv/Star.lean,Mathlib/Analysis/Calculus/Deriv/Support.lean,Mathlib/Analysis/Calculus/Deriv/ZPow.lean 665 7 ['astrainfinita', 'github-actions', 'leanprover-bot', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
366-40731
1 year ago
unknown
0-0
0 seconds
11455 adomani
author:adomani
 fix: unsqueeze simp, re Yaël's comments on #11259 This PR reverts/simplifies some of the "squeeze `simp`" changes in #11259. See #11259 for context. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author 3/6 Mathlib/Algebra/Group/Conj.lean,Mathlib/Data/Seq/WSeq.lean 2 8 ['Ruben-VandeVelde', 'YaelDillies', 'grunweg', 'loefflerd', 'robertylewis', 'urkud'] nobody
366-22726
1 year ago
664-52633
664 days ago
93-60645
93 days
7325 eric-wieser
author:eric-wieser
 chore: use preimageIso instead of defeq abuse for InducedCategory This makes a few things slightly more verbose, but the type casts are now explicit in those places. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory awaiting-CI 22/21 Mathlib/CategoryTheory/EssentialImage.lean,Mathlib/CategoryTheory/Monoidal/Braided.lean,Mathlib/CategoryTheory/Monoidal/Subcategory.lean 3 1 ['grunweg'] nobody
366-22605
1 year ago
unknown
0-0
0 seconds
7874 astrainfinita
author:astrainfinita
 chore: make `IsScalarTower A A B` and `IsScalarTower A B B` higher priority --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict slow-typeclass-synthesis t-algebra awaiting-CI
label:t-algebra$
 10/9 Mathlib/Algebra/Algebra/Defs.lean,Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Data/Rat/Cast/Defs.lean,Mathlib/GroupTheory/GroupAction/Ring.lean 4 3 ['astrainfinita', 'grunweg', 'leanprover-bot'] nobody
366-22580
1 year ago
unknown
0-0
0 seconds
13038 adomani
author:adomani
 feat: Mathlib weekly reports This PR introduces a weekly cron job that computes a "global" report on the evolution of Mathlib in the previous week. It consists of * a CI workflow with a cron job that runs at minight on Sunday (`.github/workflows/mathlib_stats.yaml`); * a Lean file extracting a categorized list of "all" the declarations in Mathlib (`scripts/count_decls.lean`); * a bash file computing Git-diff-related information and collating the data from the Lean file (`scripts/mathlib_stats.sh`); * a convenience CI workflow that is triggered on adding the `test-ci` label and results in posting on the PR and on Zulip the report (`.github/workflows/mathlib_stats_label.yaml`). The second CI workflow is intended to be removed just before/right after the PR is ready to merge. [Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/113488-general) [Thread for the reports](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Mathlib.20weekly.20change.20report) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author CI t-meta 338/0 .github/workflows/mathlib_stats.yaml,.github/workflows/mathlib_stats_label.yaml,scripts/count_decls.lean,scripts/mathlib_stats.sh 4 10 ['adomani', 'github-actions', 'grunweg', 'kim-em', 'kmill'] nobody
366-22538
1 year ago
640-40418
640 days ago
57-4374
57 days
5952 eric-wieser
author:eric-wieser
 feat: add Qq wrappers for ToExpr --- - [ ] depends on: #6699 (to appease the linter) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-CI t-meta 247/150 Mathlib/Data/Fin/Basic.lean,Mathlib/Data/Fin/VecNotation.lean,Mathlib/Data/Matrix/Notation.lean,Mathlib/Tactic/DeriveToExpr.lean,Mathlib/Tactic/FBinop.lean,Mathlib/Tactic/ToExpr.lean,Mathlib/Util/Qq.lean,test/DeriveToExpr.lean,test/vec_notation.lean 9 7 ['eric-wieser', 'gebner', 'grunweg', 'leanprover-community-mathlib4-bot'] nobody
366-22406
1 year ago
972-65669
972 days ago
29-67421
29 days
15483 astrainfinita
author:astrainfinita
 chore(GroupTheory/Coset): reduce defeq abuse --- - [x] depends on: #15482 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 114/60 Mathlib/GroupTheory/Commensurable.lean,Mathlib/GroupTheory/Coset.lean,Mathlib/GroupTheory/QuotientGroup.lean,Mathlib/LinearAlgebra/Alternating/DomCoprod.lean,Mathlib/MeasureTheory/Measure/Haar/Quotient.lean,Mathlib/Topology/Algebra/Group/Compact.lean 6 14 ['astrainfinita', 'eric-wieser', 'github-actions', 'grunweg', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'mattrobball', 'mergify', 'urkud'] nobody
366-22366
1 year ago
614-60696
614 days ago
4-79214
4 days
16594 astrainfinita
author:astrainfinita
 perf: reorder `extends` and remove some instances in algebra hierarchy --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict slow-typeclass-synthesis t-algebra
label:t-algebra$
 240/92 Mathlib.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Associated/Basic.lean,Mathlib/Algebra/BigOperators/Ring/List.lean,Mathlib/Algebra/Field/Defs.lean,Mathlib/Algebra/GCDMonoid/Basic.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Ext.lean,Mathlib/Algebra/Group/Opposite.lean,Mathlib/Algebra/Group/Prod.lean,Mathlib/Algebra/GroupWithZero/Defs.lean,Mathlib/Algebra/GroupWithZero/Prod.lean,Mathlib/Algebra/Homology/Embedding/Basic.lean,Mathlib/Algebra/Order/AddGroupWithTop.lean,Mathlib/Algebra/Order/Field/Canonical/Defs.lean,Mathlib/Algebra/Order/Field/Defs.lean,Mathlib/Algebra/Order/Group/Unbundled/Abs.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/Ring/Canonical.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Polynomial/Roots.lean,Mathlib/Algebra/Quaternion.lean,Mathlib/Algebra/Ring/Defs.lean,Mathlib/Algebra/Ring/Ext.lean,Mathlib/Algebra/Ring/InjSurj.lean,Mathlib/Algebra/Ring/Rat.lean,Mathlib/Algebra/Ring/SumsOfSquares.lean,Mathlib/Algebra/Tropical/Basic.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Order.lean,Mathlib/Analysis/InnerProductSpace/Symmetric.lean,Mathlib/CategoryTheory/Preadditive/FunctorCategory.lean,Mathlib/Data/Finset/NoncommProd.lean,Mathlib/Data/Int/Cast/Defs.lean,Mathlib/FieldTheory/IsAlgClosed/AlgebraicClosure.lean,Mathlib/FieldTheory/SplittingField/Construction.lean,Mathlib/GroupTheory/Congruence/Basic.lean,Mathlib/GroupTheory/MonoidLocalization/MonoidWithZero.lean,Mathlib/GroupTheory/Torsion.lean,Mathlib/LinearAlgebra/LinearPMap.lean,Mathlib/LinearAlgebra/TensorProduct/Basic.lean,Mathlib/Order/Filter/Germ/Basic.lean,Mathlib/Order/Interval/Finset/Box.lean,Mathlib/RingTheory/Bialgebra/Hom.lean,Mathlib/RingTheory/Coalgebra/Hom.lean,Mathlib/RingTheory/Ideal/Quotient.lean,Mathlib/RingTheory/Perfection.lean,Mathlib/RingTheory/TensorProduct/Basic.lean,Mathlib/RingTheory/TensorProduct/MvPolynomial.lean,Mathlib/Util/NoInstances.lean,scripts/noshake.json 50 8 ['astrainfinita', 'github-actions', 'grunweg', 'leanprover-bot'] nobody
366-22142
1 year ago
570-61689
570 days ago
14-58900
14 days
24106 astrainfinita
author:astrainfinita
 refactor: unbundle algebra from `*CStarAlgebra` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [ ] depends on: #24058 t-algebra blocked-by-other-PR merge-conflict slow-typeclass-synthesis t-analysis
label:t-algebra$
 4702/4459 Archive/Hairer.lean,Archive/Imo/Imo1998Q2.lean,Counterexamples/LinearOrderWithPosMulPosEqZero.lean,Mathlib/Algebra/Algebra/RestrictScalars.lean,Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Algebra/Module/ZLattice/Covolume.lean,Mathlib/Algebra/Order/Field/Canonical.lean,Mathlib/Algebra/Order/Field/Rat.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/GroupWithZero/Finset.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Order/Nonneg/Field.lean,Mathlib/Algebra/Order/Nonneg/Ring.lean,Mathlib/Algebra/Order/Ring/Nat.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/Analytic/CPolynomial.lean,Mathlib/Analysis/Analytic/CPolynomialDef.lean,Mathlib/Analysis/Analytic/ChangeOrigin.lean,Mathlib/Analysis/Analytic/Composition.lean,Mathlib/Analysis/Analytic/Constructions.lean,Mathlib/Analysis/Analytic/Inverse.lean,Mathlib/Analysis/Analytic/IsolatedZeros.lean,Mathlib/Analysis/Analytic/IteratedFDeriv.lean,Mathlib/Analysis/Analytic/Linear.lean,Mathlib/Analysis/Analytic/OfScalars.lean,Mathlib/Analysis/Analytic/Order.lean,Mathlib/Analysis/Analytic/Polynomial.lean,Mathlib/Analysis/Analytic/RadiusLiminf.lean,Mathlib/Analysis/Analytic/Uniqueness.lean,Mathlib/Analysis/Analytic/Within.lean,Mathlib/Analysis/Asymptotics/AsymptoticEquivalent.lean,Mathlib/Analysis/Asymptotics/Defs.lean,Mathlib/Analysis/Asymptotics/Lemmas.lean,Mathlib/Analysis/Asymptotics/SpecificAsymptotics.lean,Mathlib/Analysis/Asymptotics/SuperpolynomialDecay.lean,Mathlib/Analysis/Asymptotics/TVS.lean,Mathlib/Analysis/Asymptotics/Theta.lean,Mathlib/Analysis/BoundedVariation.lean,Mathlib/Analysis/BoxIntegral/Basic.lean,Mathlib/Analysis/BoxIntegral/DivergenceTheorem.lean,Mathlib/Analysis/BoxIntegral/Integrability.lean,Mathlib/Analysis/BoxIntegral/Partition/Additive.lean,Mathlib/Analysis/BoxIntegral/Partition/Measure.lean,Mathlib/Analysis/CStarAlgebra/ApproximateUnit.lean,Mathlib/Analysis/CStarAlgebra/Basic.lean,Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/CStarAlgebra/Classes.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Basic.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Instances.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Integral.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Isometric.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Order.lean,Mathlib/Analysis/CStarAlgebra/ContinuousLinearMap.lean,Mathlib/Analysis/CStarAlgebra/ContinuousMap.lean,Mathlib/Analysis/CStarAlgebra/Exponential.lean,Mathlib/Analysis/CStarAlgebra/GelfandDuality.lean,Mathlib/Analysis/CStarAlgebra/Hom.lean,Mathlib/Analysis/CStarAlgebra/Matrix.lean,Mathlib/Analysis/CStarAlgebra/Module/Constructions.lean,Mathlib/Analysis/CStarAlgebra/Module/Defs.lean,Mathlib/Analysis/CStarAlgebra/Multiplier.lean,Mathlib/Analysis/CStarAlgebra/PositiveLinearMap.lean,Mathlib/Analysis/CStarAlgebra/SpecialFunctions/PosPart.lean,Mathlib/Analysis/CStarAlgebra/Spectrum.lean,Mathlib/Analysis/CStarAlgebra/Unitization.lean,Mathlib/Analysis/CStarAlgebra/lpSpace.lean,Mathlib/Analysis/Calculus/AddTorsor/AffineMap.lean,Mathlib/Analysis/Calculus/AddTorsor/Coord.lean,Mathlib/Analysis/Calculus/BumpFunction/Basic.lean,Mathlib/Analysis/Calculus/BumpFunction/Convolution.lean,Mathlib/Analysis/Calculus/BumpFunction/FiniteDimension.lean,Mathlib/Analysis/Calculus/BumpFunction/InnerProduct.lean,Mathlib/Analysis/Calculus/BumpFunction/Normed.lean,Mathlib/Analysis/Calculus/Conformal/InnerProduct.lean,Mathlib/Analysis/Calculus/Conformal/NormedSpace.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Bounds.lean,Mathlib/Analysis/Calculus/ContDiff/CPolynomial.lean,Mathlib/Analysis/Calculus/ContDiff/Defs.lean,Mathlib/Analysis/Calculus/ContDiff/FTaylorSeries.lean,Mathlib/Analysis/Calculus/ContDiff/FaaDiBruno.lean,Mathlib/Analysis/Calculus/ContDiff/FiniteDimension.lean,Mathlib/Analysis/Calculus/ContDiff/Operations.lean,Mathlib/Analysis/Calculus/ContDiff/RCLike.lean,Mathlib/Analysis/Calculus/ContDiff/WithLp.lean,Mathlib/Analysis/Calculus/DSlope.lean,Mathlib/Analysis/Calculus/Deriv/Abs.lean,Mathlib/Analysis/Calculus/Deriv/Add.lean,Mathlib/Analysis/Calculus/Deriv/AffineMap.lean,Mathlib/Analysis/Calculus/Deriv/Basic.lean,Mathlib/Analysis/Calculus/Deriv/Comp.lean,Mathlib/Analysis/Calculus/Deriv/Inv.lean,Mathlib/Analysis/Calculus/Deriv/Inverse.lean,Mathlib/Analysis/Calculus/Deriv/Linear.lean,Mathlib/Analysis/Calculus/Deriv/Mul.lean,Mathlib/Analysis/Calculus/Deriv/Pi.lean,Mathlib/Analysis/Calculus/Deriv/Polynomial.lean,Mathlib/Analysis/Calculus/Deriv/Pow.lean,Mathlib/Analysis/Calculus/Deriv/Prod.lean 670 5 ['astrainfinita', 'github-actions', 'leanprover-bot', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
365-80272
1 year ago
unknown
0-0
0 seconds
13780 adomani
author:adomani
 deprecate injective --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 31/9 .github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build.yml.in,.github/workflows/build_fork.yml,Mathlib/Init/Function.lean,lake-manifest.json,lakefile.lean 7 2 ['github-actions', 'grunweg'] nobody
365-76056
1 year ago
unknown
0-0
0 seconds
19467 quangvdao
author:quangvdao
 feat(MvPolynomial/Equiv): Add `MvPolynomial.finSuccEquivNth` This PR adds `MvPolynomial.finSuccEquivNth`, which is the algebra isomorphism between `MvPolynomial (Fin (n + 1)) R` and `Polynomial (MvPolynomial (Fin n) R)` by identifying the `p`-th variable as the indeterminate. This generalizes `MvPolynomial.finSuccEquiv` which is only for the `0`-th variable. The supporting theorems for the `Nth` version are identical to the current version, with the `Nth` version deduced from the former. These changes require new definitions in `Finsupp/Fin`, which is a separate PR. Co-authored-by: Yaël Dillies --- - [ ] depends on: #19315 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra blocked-by-other-PR
label:t-algebra$
 541/163 Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Algebra/BigOperators/Finsupp.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Data/Fin/Basic.lean,Mathlib/Data/Fin/Tuple/Basic.lean,Mathlib/Data/Finsupp/Fin.lean,scripts/nolints_prime_decls.txt 7 9 ['acmepjz', 'github-actions', 'grunweg', 'mathlib4-dependent-issues-bot', 'quangvdao'] nobody
364-26482
11 months ago
507-46448
507 days ago
0-790
13 minutes
20313 thefundamentaltheor3m
author:thefundamentaltheor3m
 feat(Data/Complex/Exponential): prove some useful results about the complex exponential. This PR proves two basic results about the complex exponential: * `abs_exp_mul_I (x : ℂ) : abs (Complex.exp (I * x)) = Real.exp (-x.im)` * `one_sub_rexp_re_le_abs_one_sub_cexp (x : ℂ) : 1 - Real.exp x.re ≤ Complex.abs (1 - Complex.exp x)` Both results were proved as part of the sphere packing project. There's a chance they're too specific for mathlib, but I thought they were worth PRing anyway. Would it also be a good idea to tag `abs_exp_mul_I` with `simp`? Feedback/suggestions welcome. Note: `one_sub_rexp_re_le_abs_one_sub_cexp` was proved by Bhavik Mehta @b-mehta --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-analysis new-contributor 167/141 Mathlib.lean,Mathlib/Analysis/Complex/Basic.lean,Mathlib/Analysis/SpecialFunctions/Log/ERealExp.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Chebyshev.lean,Mathlib/Data/Complex/Exponential/Defs.lean,Mathlib/Data/Complex/Exponential/Lemmas.lean,Mathlib/Data/Complex/ExponentialBounds.lean,Mathlib/Tactic/FunProp.lean,MathlibTest/Recall.lean,MathlibTest/positivity.lean 10 12 ['b-mehta', 'github-actions', 'kim-em', 'thefundamentaltheor3m', 'trivial1711'] nobody
364-26435
11 months ago
447-36903
447 days ago
8-45680
8 days
22698 Kiolt
author:Kiolt
 feat: notation for whisker(Left/Right)Iso From Toric --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory toric 175/113 Mathlib/Algebra/Homology/Monoidal.lean,Mathlib/CategoryTheory/Bicategory/Adjunction/Basic.lean,Mathlib/CategoryTheory/Bicategory/Basic.lean,Mathlib/CategoryTheory/Bicategory/Coherence.lean,Mathlib/CategoryTheory/Bicategory/Extension.lean,Mathlib/CategoryTheory/Bicategory/Functor/Pseudofunctor.lean,Mathlib/CategoryTheory/Bicategory/NaturalTransformation/Strong.lean,Mathlib/CategoryTheory/Bicategory/SingleObj.lean,Mathlib/CategoryTheory/Closed/Functor.lean,Mathlib/CategoryTheory/Closed/Ideal.lean,Mathlib/CategoryTheory/Enriched/FunctorCategory.lean,Mathlib/CategoryTheory/GradedObject/Monoidal.lean,Mathlib/CategoryTheory/Monoidal/Braided/Basic.lean,Mathlib/CategoryTheory/Monoidal/Braided/Reflection.lean,Mathlib/CategoryTheory/Monoidal/Category.lean,Mathlib/CategoryTheory/Monoidal/Center.lean,Mathlib/CategoryTheory/Monoidal/Free/Coherence.lean,Mathlib/CategoryTheory/Monoidal/Preadditive.lean,Mathlib/CategoryTheory/Monoidal/Transport.lean,Mathlib/Tactic/CategoryTheory/BicategoricalComp.lean,Mathlib/Tactic/CategoryTheory/Bicategory/Datatypes.lean,Mathlib/Tactic/CategoryTheory/Bicategory/Normalize.lean,Mathlib/Tactic/CategoryTheory/Bicategory/PureCoherence.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Datatypes.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Normalize.lean,Mathlib/Tactic/CategoryTheory/Monoidal/PureCoherence.lean,Mathlib/Tactic/CategoryTheory/MonoidalComp.lean 27 21 ['Kiolt', 'YaelDillies', 'b-mehta', 'github-actions', 'leanprover-bot'] nobody
364-26264
11 months ago
400-45531
400 days ago
3-29389
3 days
19613 madvorak
author:madvorak
 refactor(Combinatorics/Optimization/ValuedCSP): make only valid `FractionalOperation` possible Originally `FractionalOperation` was any multiset (possible empty). Then `FractionalOperation.IsValid` said it was nonempty. Instead, I would like to make it nonempty by definition. As a result, empty/invalid fractional operation couldn't be declared at all. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 14/17 Mathlib/Combinatorics/Optimization/ValuedCSP.lean 1 1 ['github-actions'] nobody
364-25982
11 months ago
493-47123
493 days ago
9-74124
9 days
20730 kuotsanhsu
author:kuotsanhsu
 feat(LinearAlgebra/Matrix/SchurTriangulation): prove Schur decomposition/triangulation `Matrix.schur_triangulation` shows that a matrix over an algebraically closed field is unitarily similar to an upper triangular matrix --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra new-contributor
label:t-algebra$
 317/2 Mathlib.lean,Mathlib/LinearAlgebra/Matrix/Block.lean,Mathlib/LinearAlgebra/Matrix/SchurTriangulation.lean,Mathlib/Logic/Equiv/Basic.lean 4 14 ['eric-wieser', 'github-actions', 'kim-em', 'kuotsanhsu'] nobody
364-22567
11 months ago
444-13540
444 days ago
13-56244
13 days
19117 eric-wieser
author:eric-wieser
 feat: derivatives of matrix operations These are finally possible to state after #19108. However, a lot of bundled `ContinuousLinearMap`s are missing. --- - [x] depends on: #19108 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-analysis 336/22 Mathlib.lean,Mathlib/Analysis/Calculus/Deriv/Matrix.lean,Mathlib/Analysis/Calculus/FDeriv/Basic.lean,Mathlib/Analysis/Calculus/FDeriv/Matrix.lean 4 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
362-44945
11 months ago
unknown
0-0
0 seconds
12605 astrainfinita
author:astrainfinita
 chore: attribute [induction_eliminator] Add attribute [induction_eliminator] to `AdjoinRoot.induction_on` `ENat.recTopCoe` `ENNReal.recTopCoe` `Finset.induction` `Magma.AssocQuotient.induction_on` `ManyOneDegree.ind_on` `Module.Ray.ind` (and add `Orientation.ind` for `Orientation`, an abbrev of it. I wish that we do not need to add it in the future.) `Multiset.induction` `MvPolynomial.induction_on` `OnePoint.rec` `Opposite.rec'` `Ordinal.limitRecOn` `PartENat.casesOn` `Polynomial.induction_on'` `QuotientAddGroup.induction_on'` (and add `AddCircle.induction_on` for `AddCircle`, an abbrev of it. I wish that we do not need to add it in the future.) `QuotientGroup.induction_on'` (doesn't actually work) `Real.Angle.induction_on` `SimplexCategory.rec` `Trunc.induction_on` --- - [x] depends on: #13476 - [x] depends on: #13264 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author 354/342 Mathlib/Algebra/BigOperators/Associated.lean,Mathlib/Algebra/BigOperators/Group/Finset.lean,Mathlib/Algebra/BigOperators/Group/Multiset.lean,Mathlib/Algebra/BigOperators/Ring.lean,Mathlib/Algebra/GCDMonoid/Finset.lean,Mathlib/Algebra/GCDMonoid/Multiset.lean,Mathlib/Algebra/Group/Subgroup/Finite.lean,Mathlib/Algebra/GroupWithZero/WithZero.lean,Mathlib/Algebra/Lie/Submodule.lean,Mathlib/Algebra/Lie/Weights/Basic.lean,Mathlib/Algebra/Module/BigOperators.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/MvPolynomial/Derivation.lean,Mathlib/Algebra/MvPolynomial/Variables.lean,Mathlib/Algebra/Order/ToIntervalMod.lean,Mathlib/Algebra/Polynomial/BigOperators.lean,Mathlib/Algebra/Polynomial/Degree/Lemmas.lean,Mathlib/Algebra/Polynomial/Derivative.lean,Mathlib/Algebra/Polynomial/Eval.lean,Mathlib/Algebra/Polynomial/Induction.lean,Mathlib/Algebra/Polynomial/Module/Basic.lean,Mathlib/Algebra/Polynomial/PartialFractions.lean,Mathlib/Algebra/Polynomial/Smeval.lean,Mathlib/Algebra/Tropical/BigOperators.lean,Mathlib/AlgebraicTopology/DoldKan/NCompGamma.lean,Mathlib/AlgebraicTopology/SimplexCategory.lean,Mathlib/AlgebraicTopology/SplitSimplicialObject.lean,Mathlib/Analysis/Analytic/Constructions.lean,Mathlib/Analysis/Asymptotics/Asymptotics.lean,Mathlib/Analysis/BoxIntegral/Basic.lean,Mathlib/Analysis/BoxIntegral/Partition/Additive.lean,Mathlib/Analysis/BoxIntegral/Partition/Split.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Bounds.lean,Mathlib/Analysis/Calculus/Deriv/Polynomial.lean,Mathlib/Analysis/Convex/Combination.lean,Mathlib/Analysis/Convex/Exposed.lean,Mathlib/Analysis/Fourier/AddCircle.lean,Mathlib/Analysis/NormedSpace/Exponential.lean,Mathlib/Analysis/NormedSpace/Multilinear/Basic.lean,Mathlib/Analysis/SpecialFunctions/Complex/Arg.lean,Mathlib/Analysis/SpecialFunctions/Complex/Circle.lean,Mathlib/Analysis/SpecialFunctions/Log/Base.lean,Mathlib/Analysis/SpecialFunctions/PolynomialExp.lean,Mathlib/Analysis/SpecialFunctions/Pow/NNReal.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Angle.lean,Mathlib/CategoryTheory/Filtered/Basic.lean,Mathlib/CategoryTheory/Subobject/Lattice.lean,Mathlib/Combinatorics/Additive/PluenneckeRuzsa.lean,Mathlib/Combinatorics/SetFamily/Compression/Down.lean,Mathlib/Combinatorics/SetFamily/FourFunctions.lean,Mathlib/Combinatorics/SetFamily/HarrisKleitman.lean,Mathlib/Computability/Reduce.lean,Mathlib/Data/DFinsupp/Basic.lean,Mathlib/Data/DFinsupp/WellFounded.lean,Mathlib/Data/Finset/Basic.lean,Mathlib/Data/Finset/Fold.lean,Mathlib/Data/Finset/Lattice.lean,Mathlib/Data/Finset/NAry.lean,Mathlib/Data/Fintype/Sum.lean,Mathlib/Data/Multiset/Antidiagonal.lean,Mathlib/Data/Multiset/Basic.lean,Mathlib/Data/Multiset/Bind.lean,Mathlib/Data/Multiset/Fold.lean,Mathlib/Data/Multiset/Lattice.lean,Mathlib/Data/Multiset/Pi.lean,Mathlib/Data/Multiset/Powerset.lean,Mathlib/Data/Multiset/Sections.lean,Mathlib/Data/Nat/Choose/Multinomial.lean,Mathlib/Data/Nat/PartENat.lean,Mathlib/Data/Quot.lean,Mathlib/Data/Set/Pointwise/BigOperators.lean,Mathlib/FieldTheory/IntermediateField.lean,Mathlib/FieldTheory/IsAlgClosed/AlgebraicClosure.lean,Mathlib/Geometry/Manifold/Algebra/Monoid.lean,Mathlib/Geometry/RingedSpace/Basic.lean,Mathlib/Geometry/RingedSpace/OpenImmersion.lean,Mathlib/Geometry/RingedSpace/PresheafedSpace/Gluing.lean,Mathlib/GroupTheory/Coset.lean,Mathlib/GroupTheory/NoncommPiCoprod.lean,Mathlib/GroupTheory/Perm/Cycle/Type.lean,Mathlib/LinearAlgebra/Determinant.lean,Mathlib/LinearAlgebra/Eigenspace/Basic.lean,Mathlib/LinearAlgebra/FiniteDimensional.lean,Mathlib/LinearAlgebra/LinearIndependent.lean,Mathlib/LinearAlgebra/Matrix/Determinant/Basic.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/Orientation.lean,Mathlib/LinearAlgebra/Projectivization/Basic.lean,Mathlib/LinearAlgebra/Ray.lean,Mathlib/LinearAlgebra/TensorProduct/Basic.lean,Mathlib/Logic/Hydra.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/Basic.lean,Mathlib/MeasureTheory/Function/L1Space.lean,Mathlib/MeasureTheory/Function/SimpleFunc.lean,Mathlib/MeasureTheory/Integral/Lebesgue.lean,Mathlib/MeasureTheory/Integral/Marginal.lean,Mathlib/MeasureTheory/Integral/MeanInequalities.lean,Mathlib/MeasureTheory/Integral/SetIntegral.lean,Mathlib/MeasureTheory/Measure/AddContent.lean 140 14 ['YaelDillies', 'astrainfinita', 'eric-wieser', 'github-actions', 'leanprover-community-mathlib4-bot', 'urkud'] nobody
362-39560
11 months ago
694-71131
694 days ago
4-46495
4 days
23859 urkud
author:urkud
 feat(Topology/../Order/Field): generalize to `Semifield` .. from a linear ordered field to a linear ordered semifield--- - [ ] depends on: #23857 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology 245/219 Mathlib/Algebra/Order/Group/Pointwise/Interval.lean,Mathlib/Analysis/BoxIntegral/Box/SubboxInduction.lean,Mathlib/Topology/Algebra/Order/Field.lean,Mathlib/Topology/Order/Basic.lean 4 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
359-65383
11 months ago
372-76024
372 days ago
0-265
4 minutes
24219 Paul-Lez
author:Paul-Lez
 feat: linear independence of the tensor product of two linearly independent families This is still WIP (the proofs are a little too long, and some lemmas need to be moved to other files!) From Toric --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra toric
label:t-algebra$
 193/0 Mathlib/LinearAlgebra/LinearIndependent/Tprod.lean 1 1 ['github-actions'] nobody
359-44815
11 months ago
361-61720
361 days ago
0-217
3 minutes
23810 b-reinke
author:b-reinke
 chore(Order/Interval): generalize succ/pred lemmas to partial orders Many lemmas in `Mathlib/Order/Interval/Set/SuccPred.lean`and `Mathlib/Order/Interval/Finset/SuccPred.lean` also work for partial orders. They are generalized in this PR by introducing different sections for `PartialOrder` and `LinearOrder` assumptions in the respective files. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-order 231/89 Mathlib/Order/Interval/Finset/SuccPred.lean,Mathlib/Order/Interval/Set/SuccPred.lean 2 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
357-42158
11 months ago
357-42160
357 days ago
16-29623
16 days
24285 madvorak
author:madvorak
 chore(Algebra/*-{Category,Homology}): remove unnecessary universe variables Discussions: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Call.20for.20help.3A.20technical.2F.20organisational.20debt/with/513620128 https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Algebra.20and.20.60Type*.60/with/513558902 https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Task.2026.3A.20Replace.20Type.20u.20by.20Type*.20wherever.20possible/with/513592993 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 542/916 Mathlib/Algebra/AddTorsor/Basic.lean,Mathlib/Algebra/Algebra/Defs.lean,Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Algebra/Field.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Algebra/Operations.lean,Mathlib/Algebra/Algebra/Spectrum/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/Algebra/Algebra/Subalgebra/Tower.lean,Mathlib/Algebra/Algebra/Tower.lean,Mathlib/Algebra/Central/Basic.lean,Mathlib/Algebra/Central/Defs.lean,Mathlib/Algebra/Central/TensorProduct.lean,Mathlib/Algebra/CharP/Pi.lean,Mathlib/Algebra/CharP/Quotient.lean,Mathlib/Algebra/CharP/Subring.lean,Mathlib/Algebra/DirectSum/Algebra.lean,Mathlib/Algebra/DirectSum/Basic.lean,Mathlib/Algebra/DirectSum/Finsupp.lean,Mathlib/Algebra/DirectSum/Module.lean,Mathlib/Algebra/EuclideanDomain/Basic.lean,Mathlib/Algebra/EuclideanDomain/Defs.lean,Mathlib/Algebra/Field/Basic.lean,Mathlib/Algebra/Field/Defs.lean,Mathlib/Algebra/Field/IsField.lean,Mathlib/Algebra/Field/MinimalAxioms.lean,Mathlib/Algebra/Field/Subfield/Basic.lean,Mathlib/Algebra/Field/Subfield/Defs.lean,Mathlib/Algebra/FreeNonUnitalNonAssocAlgebra.lean,Mathlib/Algebra/Group/Conj.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Equiv/Finite.lean,Mathlib/Algebra/Group/Ext.lean,Mathlib/Algebra/Group/Hom/End.lean,Mathlib/Algebra/Group/Hom/Instances.lean,Mathlib/Algebra/Group/Invertible/Basic.lean,Mathlib/Algebra/Group/Invertible/Defs.lean,Mathlib/Algebra/Group/Pi/Basic.lean,Mathlib/Algebra/Group/Pi/Lemmas.lean,Mathlib/Algebra/Group/TypeTags/Basic.lean,Mathlib/Algebra/Group/TypeTags/Finite.lean,Mathlib/Algebra/Group/TypeTags/Hom.lean,Mathlib/Algebra/Group/Units/Basic.lean,Mathlib/Algebra/Group/Units/Defs.lean,Mathlib/Algebra/Group/Units/Hom.lean,Mathlib/Algebra/Group/WithOne/Basic.lean,Mathlib/Algebra/Group/WithOne/Defs.lean,Mathlib/Algebra/GroupWithZero/Action/Pi.lean,Mathlib/Algebra/GroupWithZero/Defs.lean,Mathlib/Algebra/GroupWithZero/Invertible.lean,Mathlib/Algebra/GroupWithZero/NeZero.lean,Mathlib/Algebra/Lie/Abelian.lean,Mathlib/Algebra/Lie/Basic.lean,Mathlib/Algebra/Lie/CartanMatrix.lean,Mathlib/Algebra/Lie/CartanSubalgebra.lean,Mathlib/Algebra/Lie/Character.lean,Mathlib/Algebra/Lie/Classical.lean,Mathlib/Algebra/Lie/DirectSum.lean,Mathlib/Algebra/Lie/Free.lean,Mathlib/Algebra/Lie/Ideal.lean,Mathlib/Algebra/Lie/IdealOperations.lean,Mathlib/Algebra/Lie/Matrix.lean,Mathlib/Algebra/Lie/Nilpotent.lean,Mathlib/Algebra/Lie/NonUnitalNonAssocAlgebra.lean,Mathlib/Algebra/Lie/OfAssociative.lean,Mathlib/Algebra/Lie/Quotient.lean,Mathlib/Algebra/Lie/SkewAdjoint.lean,Mathlib/Algebra/Lie/Solvable.lean,Mathlib/Algebra/Lie/Subalgebra.lean,Mathlib/Algebra/Lie/Submodule.lean,Mathlib/Algebra/Lie/TensorProduct.lean,Mathlib/Algebra/Lie/UniversalEnveloping.lean,Mathlib/Algebra/Module/Basic.lean,Mathlib/Algebra/Module/CharacterModule.lean,Mathlib/Algebra/Module/DedekindDomain.lean,Mathlib/Algebra/Module/Defs.lean,Mathlib/Algebra/Module/End.lean,Mathlib/Algebra/Module/Equiv/Opposite.lean,Mathlib/Algebra/Module/Lattice.lean,Mathlib/Algebra/Module/LinearMap/Basic.lean,Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/Algebra/Module/LinearMap/End.lean,Mathlib/Algebra/Module/LocalizedModule/Basic.lean,Mathlib/Algebra/Module/MinimalAxioms.lean,Mathlib/Algebra/Module/NatInt.lean,Mathlib/Algebra/Module/Opposite.lean,Mathlib/Algebra/Module/Pi.lean,Mathlib/Algebra/Module/Presentation/Differentials.lean,Mathlib/Algebra/Module/Presentation/Tensor.lean,Mathlib/Algebra/Module/Rat.lean,Mathlib/Algebra/Module/RingHom.lean,Mathlib/Algebra/Module/Submodule/Basic.lean,Mathlib/Algebra/Module/Torsion.lean,Mathlib/Algebra/MonoidAlgebra/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Defs.lean,Mathlib/Algebra/MonoidAlgebra/Support.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/MvPolynomial/CommRing.lean,Mathlib/Algebra/MvPolynomial/Degrees.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean 182 22 ['erdOne', 'github-actions', 'leanprover-bot', 'leanprover-community-bot-assistant', 'madvorak', 'mattrobball'] nobody
357-30855
11 months ago
357-30856
357 days ago
2-12017
2 days
14931 eric-wieser
author:eric-wieser
 feat: volume of a simplex --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-euclidean-geometry 207/0 Mathlib/Geometry/Euclidean/Basic.lean,Mathlib/Geometry/Euclidean/Circumcenter.lean,Mathlib/Geometry/Euclidean/Volume.lean 3 3 ['eric-wieser', 'github-actions', 'leanprover-community-bot-assistant'] nobody
355-43312
11 months ago
unknown
0-0
0 seconds
22583 imathwy
author:imathwy
 feat: affinespace homeomorphism There exists a homeomorphism (a continuous bijection with a continuous inverse) between an affine subspace s of a vector space V over a field 𝕜 and its direction s.direction , given a chosen point z ∈ s . --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 64/2 Mathlib/Analysis/Normed/Group/AddTorsor.lean,Mathlib/LinearAlgebra/AffineSpace/ContinuousAffineEquiv.lean,Mathlib/Topology/Algebra/ConstMulAction.lean,Mathlib/Topology/Algebra/MulAction.lean 4 6 ['JovanGerb', 'eric-wieser', 'github-actions', 'grunweg'] nobody
355-41030
11 months ago
407-53051
407 days ago
0-18122
5 hours
24243 Timeroot
author:Timeroot
 feat(Analysis/Calculus/FDeriv): Fderiv on torsors Experiment to see how this goes for now, see [Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Upgrade.20.60fderiv.60.20to.20.60AddTorsor.60) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-analysis 539/447 Mathlib/Algebra/AddTorsor/Defs.lean,Mathlib/Analysis/Calculus/Deriv/Basic.lean,Mathlib/Analysis/Calculus/Deriv/Prod.lean,Mathlib/Analysis/Calculus/Deriv/Slope.lean,Mathlib/Analysis/Calculus/FDeriv/Add.lean,Mathlib/Analysis/Calculus/FDeriv/Basic.lean,Mathlib/Analysis/Calculus/FDeriv/Bilinear.lean,Mathlib/Analysis/Calculus/FDeriv/Equiv.lean,Mathlib/Analysis/Calculus/FDeriv/Linear.lean,Mathlib/Analysis/Calculus/FDeriv/Measurable.lean,Mathlib/Analysis/Calculus/FDeriv/Mul.lean,Mathlib/Analysis/Calculus/FDeriv/Symmetric.lean,Mathlib/Analysis/Calculus/Gradient/Basic.lean,Mathlib/Analysis/Calculus/LineDeriv/Basic.lean,Mathlib/Analysis/Calculus/LocalExtr/Basic.lean,Mathlib/Analysis/Calculus/ParametricIntegral.lean,Mathlib/Analysis/Calculus/Rademacher.lean,Mathlib/Analysis/Calculus/TangentCone.lean,Mathlib/Analysis/Calculus/UniformLimitsDeriv.lean,Mathlib/Analysis/Complex/Periodic.lean,Mathlib/Analysis/Complex/RealDeriv.lean,Mathlib/Analysis/MellinTransform.lean,Mathlib/Analysis/Normed/Group/Uniform.lean,Mathlib/Analysis/Normed/Module/Basic.lean,Mathlib/Analysis/SpecialFunctions/ExpDeriv.lean,Mathlib/Analysis/SpecialFunctions/Exponential.lean,Mathlib/Analysis/SpecialFunctions/Gamma/Deriv.lean,Mathlib/Analysis/SpecialFunctions/Pow/Deriv.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/EulerSineProd.lean,Mathlib/Geometry/Manifold/IntegralCurve/Transform.lean,Mathlib/Geometry/Manifold/IsManifold/Basic.lean,Mathlib/Geometry/Manifold/MFDeriv/Basic.lean,Mathlib/Geometry/Manifold/MFDeriv/SpecificFunctions.lean,Mathlib/NumberTheory/EulerProduct/ExpLog.lean,Mathlib/NumberTheory/Harmonic/GammaDeriv.lean,Mathlib/NumberTheory/LSeries/Nonvanishing.lean,MathlibTest/Recall.lean 37 3 ['github-actions', 'leanprover-community-bot-assistant'] nobody
354-24168
11 months ago
unknown
0-0
0 seconds
23593 erdOne
author:erdOne
 feat(AlgebraicGeometry): the tilde construction is functorial --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebraic-geometry 95/38 Mathlib/AlgebraicGeometry/Modules/Sheaf.lean,Mathlib/AlgebraicGeometry/Modules/Tilde.lean 2 4 ['chrisflav', 'github-actions', 'leanprover-community-bot-assistant'] nobody
353-58226
11 months ago
378-61240
378 days ago
0-71091
19 hours
21065 eric-wieser
author:eric-wieser
 feat: generalize `tangentConeAt.lim_zero` to TVS ... and then adjust the `variable`s down the rest of the file to make use of the generality. There are two key lemmas that this does not generalize, which would probably unlock the rest of the file: * `subset_tangentCone_prod_left` (and `_right`) * `zero_mem_tangentCone` --- - [ ] depends on: #20859 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-analysis 55/28 Mathlib/Analysis/Calculus/TangentCone.lean 1 16 ['ADedecker', 'eric-wieser', 'github-actions', 'j-loreaux', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'urkud'] nobody
353-50630
11 months ago
421-305
421 days ago
23-20117
23 days
22721 grunweg
author:grunweg
 chore(MeasureTheory/Function/LpSeminorm/Basic): generalise more results to enorm classes Done for the Carleson project. --- - depends on #22708 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP carleson t-measure-probability 134/10 Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean 1 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
352-43298
11 months ago
404-29664
404 days ago
0-6
6 seconds
14731 adomani
author:adomani
 feat: the repeated typeclass assumption linter [#mathlib4 > recyclable variables @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/recyclable.20variables/near/451167963) also [#mathlib4 > Normed modules @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Normed.20modules/near/512242167) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-linter large-import 178/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter.lean,Mathlib/Tactic/Linter/DependentTypeclass.lean,MathlibTest/DependentTypeclass.lean 5 3 ['github-actions', 'leanprover-community-bot-assistant', 'mattrobball'] nobody
351-48537
11 months ago
641-47282
641 days ago
0-109
1 minute
24549 grunweg
author:grunweg
 feat: define embedded submanifolds, attempt 1 Not meant to be merged (I think a different design is better); opening this so I can find this more easily. --- - [ ] depends on: #23040 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-differential-geometry blocked-by-other-PR 1445/2 Mathlib.lean,Mathlib/Analysis/NormedSpace/HahnBanach/Splits.lean,Mathlib/Geometry/Manifold/Diffeomorph.lean,Mathlib/Geometry/Manifold/EmbeddedSubmanifold.lean,Mathlib/Geometry/Manifold/IsImmersionEmbedding.lean,Mathlib/Geometry/Manifold/LocalDiffeomorph.lean,Mathlib/Geometry/Manifold/MSplits.lean,Mathlib/LinearAlgebra/Prod.lean 8 2 ['leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
348-73750
11 months ago
349-56673
349 days ago
0-1
1 second
23921 alreadydone
author:alreadydone
 Jyxu/projective trace --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra
label:t-algebra$
 157/123 Mathlib/FieldTheory/CardinalEmb.lean,Mathlib/FieldTheory/Relrank.lean,Mathlib/LinearAlgebra/Contraction.lean,Mathlib/LinearAlgebra/Dual.lean,Mathlib/RingTheory/LocalProperties/Projective.lean 5 1 ['leanprover-community-bot-assistant'] nobody
348-73582
11 months ago
unknown
0-0
0 seconds
22809 b-reinke
author:b-reinke
 feat: Category algebras and path algebras This PR defines the category algebra of a linear category and path algebras of quivers. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra t-category-theory new-contributor
label:t-algebra$
 218/0 Mathlib/Algebra/Ring/Assoc.lean,Mathlib/CategoryTheory/Linear/CategoryAlgebra.lean,Mathlib/Combinatorics/Quiver/PathAlgebra.lean,Mathlib/Data/DFinsupp/BigOperators.lean 4 2 ['b-reinke', 'github-actions'] nobody
348-73406
11 months ago
unknown
0-0
0 seconds
21252 ADedecker
author:ADedecker
 feat: redefine uniformly convex normed spaces with filters instead of epsilons And conceptualize some proofs. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology t-algebra
label:t-algebra$
 301/87 Mathlib/Analysis/Convex/Uniform.lean,Mathlib/Analysis/InnerProductSpace/Basic.lean,Mathlib/Order/Basic.lean,Mathlib/Order/Filter/Pointwise.lean,Mathlib/Topology/Algebra/UniformGroup/Defs.lean,Mathlib/Topology/Algebra/UniformMulAction.lean 6 1 ['github-actions'] nobody
348-73321
11 months ago
unknown
0-0
0 seconds
19821 eric-wieser
author:eric-wieser
 feat: add a Qq version of AtomM that groups by type --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP large-import t-meta 332/30 Mathlib/Data/Ineq.lean,Mathlib/Tactic/Linarith/Datatypes.lean,Mathlib/Tactic/Linarith/Oracle/SimplexAlgorithm.lean,Mathlib/Tactic/Linarith/Preprocessing.lean,Mathlib/Util/AtomM.lean,Mathlib/Util/Qq.lean 6 1 ['github-actions'] nobody
348-73134
11 months ago
unknown
0-0
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19120 hrmacbeth
author:hrmacbeth
 feat: stop `ring`/`abel` from seeing algebraic operations inside `let`s This draft PR illustrates a feature I would like to see in core: a variant of `whnf` which allows particular kinds of reduction, such as zeta-delta reduction, to be turned off. Here it is used to make ring-normalization and abelian-group-normalization a bit more responsive to what (I think) users expect: these normalizations would no longer look inside user-defined lets to see algebraic operations in those expressions. Note: In Lean/Mathlib 3, `ring` matched for algebraic operations on an algebraic expression `e` itself, not on `← whnfR e`. So mathlib3 `ring` didn't see algebraic operations inside `let`s -- but it also didn't see algebraic operations requiring beta-reduction (like `(fun t ↦ t + 1) x`) or see inside abbreviations. [Zulip](https://leanprover.zulipchat.com/#narrow/channel/239415-metaprogramming-.2F-tactics/topic/whnf.20variant.20which.20preserves.20let-bindings) Update: fortuitously, it looks like the new core PR https://github.com/leanprover/lean4/pull/6053 will provide this feature! --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-core-PR t-meta 137/15 Archive/Imo/Imo2006Q3.lean,Archive/Imo/Imo2008Q2.lean,Mathlib.lean,Mathlib/Algebra/ContinuedFractions/Computation/Approximations.lean,Mathlib/Analysis/Analytic/Composition.lean,Mathlib/Analysis/Calculus/FDeriv/Measurable.lean,Mathlib/Analysis/SpecialFunctions/Gamma/BohrMollerup.lean,Mathlib/Analysis/SpecialFunctions/Integrals.lean,Mathlib/Analysis/SpecialFunctions/Stirling.lean,Mathlib/Data/Real/Pi/Irrational.lean,Mathlib/NumberTheory/LSeries/HurwitzZetaOdd.lean,Mathlib/NumberTheory/SumPrimeReciprocals.lean,Mathlib/RingTheory/WittVector/DiscreteValuationRing.lean,Mathlib/Tactic/Abel.lean,Mathlib/Tactic/Polyrith.lean,Mathlib/Tactic/Ring/Basic.lean,Mathlib/Tactic/Ring/RingNF.lean,Mathlib/Topology/MetricSpace/GromovHausdorff.lean,Mathlib/Util/WHNF.lean,MathlibTest/abel.lean,MathlibTest/ring.lean 21 5 ['JovanGerb', 'github-actions', 'grunweg', 'hrmacbeth'] nobody
348-73114
11 months ago
unknown
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17069 yuma-mizuno
author:yuma-mizuno
 chore(CategoryTheory/Functor/Basic): put `simp` at `Functor.id_comp` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory 41/30 Mathlib/CategoryTheory/Adjunction/Mates.lean,Mathlib/CategoryTheory/Functor/Basic.lean,Mathlib/CategoryTheory/GuitartExact/VerticalComposition.lean,Mathlib/CategoryTheory/Limits/HasLimits.lean,Mathlib/CategoryTheory/Shift/CommShift.lean 5 3 ['github-actions', 'leanprover-bot', 'yuma-mizuno'] nobody
348-73104
11 months ago
unknown
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14803 StevenClontz
author:StevenClontz
 chore: use `Disjoint` nhd filters for all separation axioms --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology 157/122 Mathlib/Topology/Separation.lean 1 1 ['github-actions'] nobody
348-73088
11 months ago
unknown
0-0
0 seconds
14675 adomani
author:adomani
 dev: the repeated variable linter --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-linter 71/0 Mathlib/Tactic/Linter/Lint.lean 1 1 ['github-actions'] nobody
348-73083
11 months ago
643-59637
643 days ago
0-8
8 seconds
14330 Ruben-VandeVelde
author:Ruben-VandeVelde
 chore: split Mathlib.Algebra.Star.Basic --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author 446/331 Mathlib.lean,Mathlib/Algebra/Module/LinearMap/Star.lean,Mathlib/Algebra/Star/Basic.lean,Mathlib/Algebra/Star/BigOperators.lean,Mathlib/Algebra/Star/Defs.lean,Mathlib/Algebra/Star/Lemmas.lean,Mathlib/Algebra/Star/Order.lean,Mathlib/Algebra/Star/Pi.lean,Mathlib/Algebra/Star/Pointwise.lean,Mathlib/Algebra/Star/Rat.lean,Mathlib/Algebra/Star/Regular.lean,Mathlib/Algebra/Star/StarRingHom.lean,Mathlib/Analysis/NormedSpace/LinearIsometry.lean,Mathlib/Data/Complex/Basic.lean,scripts/noshake.json 15 3 ['github-actions', 'grunweg', 'j-loreaux'] nobody
348-73043
11 months ago
654-2988
654 days ago
0-45204
12 hours
14007 adomani
author:adomani
 test: papercut linter working on all mathlib This PR is a testing ground for potential issues with the papercut linter #13999. It is not intended to be merged. The linter is active on all of mathlib, to make sure that the linter does not throw errors, but only emits warnings! --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-linter 249/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter.lean,Mathlib/Tactic/Linter/Papercut.lean,test/Papercut.lean 5 1 ['github-actions'] nobody
348-72928
11 months ago
unknown
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20354 eric-wieser
author:eric-wieser
 feat: generalize `ContinuousLinearMap.curry` to TVS Follow on from #10777 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-analysis 57/25 Mathlib/Analysis/NormedSpace/Multilinear/Curry.lean 1 3 ['eric-wieser', 'github-actions', 'leanprover-community-bot-assistant'] nobody
348-72863
11 months ago
unknown
0-0
0 seconds
8511 eric-wieser
author:eric-wieser
 refactor(MeasureTheory/Measure/Haar/Basic): partially generalize to the affine case Without a `Mul` version of `AddTorsor`, this generalization can only go so far. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-measure-probability 52/46 Mathlib/MeasureTheory/Measure/Haar/Basic.lean 1 0 [] nobody
348-72674
11 months ago
879-44354
879 days ago
0-7
7 seconds
7994 ericrbg
author:ericrbg
 chore: generalize `LieSubalgebra.mem_map_submodule` --- Not sure if we should rename to something like `mem_map_iff_mem_map_submodule` or not. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt merge-conflict t-algebra
label:t-algebra$
 16/4 Mathlib/Algebra/Lie/SkewAdjoint.lean,Mathlib/Algebra/Lie/Subalgebra.lean 2 3 ['eric-wieser', 'ericrbg'] nobody
348-72662
11 months ago
901-67657
901 days ago
0-1
1 second
6317 eric-wieser
author:eric-wieser
 refactor(Data/Finsupp/Defs): make Finsupp.single defeq to Pi.single By adding a `DecidableEq ι` argument to `Finsupp.single`, we remove the reference to `Classical.decEq ι` in the definition, which in turn means that when coerced to a function it is now defeq to `Pi.single`. This also brings it in line with `DFinsupp.single`. This does not go as far as making `Finsupp.single` computable. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-data 269/226 Mathlib/Algebra/BigOperators/Finsupp.lean,Mathlib/Data/Finsupp/AList.lean,Mathlib/Data/Finsupp/Basic.lean,Mathlib/Data/Finsupp/Defs.lean,Mathlib/Data/Finsupp/Fintype.lean,Mathlib/Data/Finsupp/Indicator.lean,Mathlib/Data/Finsupp/Multiset.lean,Mathlib/Data/Finsupp/Order.lean,Mathlib/Data/Finsupp/ToDFinsupp.lean,Mathlib/Data/Nat/Choose/Multinomial.lean,Mathlib/LinearAlgebra/Basis.lean,Mathlib/LinearAlgebra/Finsupp.lean 12 0 [] nobody
348-72656
11 months ago
unknown
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6277 jjaassoonn
author:jjaassoonn
 Dimension theory Some results are - The ring Krull dimension and the topological dimension of the prime spectrum of a ring are the same - A field is zero-dimensional and a PID that is not a field is one dimensional - An Artinian ring is zero-dimensional - The Krull dimension of ring $R$ is equal to the supremum of heights of maximal ideals [00KG](https://stacks.math.columbia.edu/tag/00KG) - two definitions of module length agree - A module is finite length iff both artinian and noetherian - length of module $M$ is equal to the sum of length of $N$ and length of $M / N$ where $N$ is a submodule of $M$. - Noetherian ring has only finitely many minimal primes #9088 - In a zero dimensional ring, prime ideals are maximal - Artinian rings has finitely many maximal ideals #9087 - zero-dimensional rings with finitely many prime ideals are products of its localizations: $R \cong \prod_{\mathfrak{p}}R_{\mathfrak{p}}$ - Let $M_0 \le ... \le M_n$, then $l(M_n/ M_0) = l(M_1/M_0) + l(M_2/M_1) + ... + l(M_n/M_{n-1})$ where $l$ denotes module length. - If $f : R \to S$ is a ring homomorphism and $M$ an $S$-module, then $l_R(M) \le l_S(M)$, when $f$ is surjective then they are equal. (Note that this is expressed using `[Algebra R S]` and `RestrictScalars R S M`, instead of a literal ring hom) - Artinian rings are noetherian ring of dimension 0. - For 0-dimensional local ring, its maximal ideal is locally nilpotent - In notherian ring, $I \le \sqrt{J}$ implies $I ^ n \le J$ for some $n$ --- - [x] depends on: #6309 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 3289/459 Mathlib.lean,Mathlib/Algebra/Module/Length.lean,Mathlib/Algebra/Module/Submodule/JordanHolder.lean,Mathlib/Algebra/PUnitInstances.lean,Mathlib/AlgebraicGeometry/PrimeSpectrum/ArtinianAndNoetherian.lean,Mathlib/Data/List/Basic.lean,Mathlib/Data/List/Dedup.lean,Mathlib/Data/List/Nodup.lean,Mathlib/LinearAlgebra/Quotient.lean,Mathlib/Order/Cover.lean,Mathlib/Order/JordanHolder.lean,Mathlib/Order/KrullDimension.lean,Mathlib/Order/ListOnPartialOrderTypes.lean,Mathlib/Order/Monotone/Basic.lean,Mathlib/Order/RelSeries.lean,Mathlib/RingTheory/Artinian.lean,Mathlib/RingTheory/Finiteness.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/Ideal/Pi.lean,Mathlib/RingTheory/KrullDimension.lean,Mathlib/RingTheory/Noetherian.lean,Mathlib/RingTheory/SimpleModule.lean,Mathlib/Topology/KrullDimension.lean,Mathlib/Topology/Sheaves/SheafCondition/EqualizerProducts.lean 24 11 ['alreadydone', 'jjaassoonn', 'leanprover-community-mathlib4-bot'] nobody
348-72651
11 months ago
unknown
0-0
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8536 jjaassoonn
author:jjaassoonn
 characteristic predicate of tensor product --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 399/7 Mathlib/Algebra/Category/AlgebraCat/Monoidal.lean,Mathlib/LinearAlgebra/IsTensorProduct.lean,Mathlib/LinearAlgebra/TensorProduct.lean,Mathlib/LinearAlgebra/TensorProduct/Tower.lean 4 12 ['alreadydone', 'eric-wieser', 'jjaassoonn'] nobody
348-72604
11 months ago
unknown
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11524 mcdoll
author:mcdoll
 refactor: Introduce type-class for SchwartzMap --- There are a lot of other refactors to do (`seminormAux` should have a nicer name and gobble up more theorems from `seminorm`), then one can prove `integrable` and friends with only `SchwartzMapClass`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-analysis 139/137 Mathlib/Analysis/Distribution/SchwartzSpace.lean,Mathlib/Analysis/Fourier/PoissonSummation.lean,Mathlib/Topology/ContinuousFunction/ZeroAtInfty.lean 3 0 [] nobody
348-72570
11 months ago
unknown
0-0
0 seconds
11003 thorimur
author:thorimur
 chore: migrate to `tfae` block tactic Migrates to the `tfae` block tactic syntax, eliminating uses of `tfae_have` and `tfae_finish`. --- - [ ] depends on: #11000 - [ ] depends on: #10991 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP blocked-by-other-PR t-meta 1267/1081 Mathlib/Algebra/Exact.lean,Mathlib/Algebra/Homology/ShortComplex/ExactFunctor.lean,Mathlib/Algebra/Order/ToIntervalMod.lean,Mathlib/Analysis/BoxIntegral/Box/Basic.lean,Mathlib/Analysis/InnerProductSpace/Basic.lean,Mathlib/Analysis/LocallyConvex/WithSeminorms.lean,Mathlib/Analysis/NormedSpace/OperatorNorm/NormedSpace.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/Analysis/SpecificLimits/Normed.lean,Mathlib/CategoryTheory/Abelian/Exact.lean,Mathlib/CategoryTheory/Bicategory/Kan/Adjunction.lean,Mathlib/FieldTheory/Galois.lean,Mathlib/FieldTheory/KummerExtension.lean,Mathlib/GroupTheory/Nilpotent.lean,Mathlib/LinearAlgebra/Eigenspace/Zero.lean,Mathlib/MeasureTheory/Group/Action.lean,Mathlib/NumberTheory/FLT/Basic.lean,Mathlib/Order/CompactlyGenerated/Basic.lean,Mathlib/Order/Height.lean,Mathlib/Order/WellFoundedSet.lean,Mathlib/RingTheory/Bezout.lean,Mathlib/RingTheory/DiscreteValuationRing/TFAE.lean,Mathlib/RingTheory/Flat/EquationalCriterion.lean,Mathlib/RingTheory/Henselian.lean,Mathlib/RingTheory/LocalRing/RingHom/Basic.lean,Mathlib/RingTheory/Valuation/Basic.lean,Mathlib/RingTheory/Valuation/ValuationRing.lean,Mathlib/SetTheory/Ordinal/Topology.lean,Mathlib/Tactic/TFAE.lean,Mathlib/Topology/Algebra/Group/SubmonoidClosure.lean,Mathlib/Topology/Category/CompHaus/EffectiveEpi.lean,Mathlib/Topology/Category/Profinite/EffectiveEpi.lean,Mathlib/Topology/Category/Stonean/EffectiveEpi.lean,Mathlib/Topology/Inseparable.lean,Mathlib/Topology/LocallyClosed.lean,Mathlib/Topology/LocallyConstant/Basic.lean,Mathlib/Topology/NoetherianSpace.lean,Mathlib/Topology/Order/LeftRightNhds.lean,Mathlib/Topology/Separation.lean,Mathlib/Topology/UniformSpace/UniformConvergence.lean,scripts/noshake.json,test/tfae.lean 42 2 ['github-actions', 'leanprover-community-mathlib4-bot'] nobody
348-72566
11 months ago
577-33939
577 days ago
3-60883
3 days
9819 jjaassoonn
author:jjaassoonn
 fg graded ring 1. if $A$ is a noetherian graded ring, then $A_0$ is a noetherian subring of $A$ and $A$ is a finitely generated algebra over $A_0$, if $M$ is a finitely generated graded module over $A$, then each $M_n$ is a finitely generated module over $A_0$. 2. Definition of additive functions over any abelian category: if $C$ is an abelian category, a function $f : C \to \mathbb Z$ is said to be additive, if $f(y) = f(x) + f(z)$ whenever $0\to x \to y \to z \to 0$ is exact. proved some basic properties such as $f(0) = 0$ and $f(x) = f(y)$ whenever $x \cong y$ and interaction of $f$ with longer exact sequences 3. The category of finitely generated module over noetherian ring is abelian 4. A proof of Hilbert-Serre theorem: the Poincare series is actually of the form $\frac{p}{\prod(1- X^i)}$ where $p$ is polynomial The code works, but poorly written. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra
label:t-algebra$
 6745/217 Mathlib.lean,Mathlib/Algebra/Category/FGModuleCat/Abelian.lean,Mathlib/Algebra/Category/FGModuleCat/Basic.lean,Mathlib/Algebra/Category/FGModuleCat/EpiMono.lean,Mathlib/Algebra/Category/FGModuleCat/Kernels.lean,Mathlib/Algebra/Category/FGModuleCat/Limits.lean,Mathlib/Algebra/DirectSum/Basic.lean,Mathlib/Algebra/GradedMonoid.lean,Mathlib/Algebra/HilbertSerre/AdditiveFunction.lean,Mathlib/Algebra/HilbertSerre/FiniteInstances.lean,Mathlib/Algebra/HilbertSerre/HilbertPolynomial.lean,Mathlib/Algebra/HilbertSerre/Theorem.lean,Mathlib/Algebra/Module/GradeZeroModule.lean,Mathlib/Algebra/Module/GradedModule.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Topology.lean,Mathlib/RingTheory/FiniteType.lean,Mathlib/RingTheory/Finiteness.lean,Mathlib/RingTheory/GradedAlgebra/Basic.lean,Mathlib/RingTheory/GradedAlgebra/HomogeneousIdeal.lean,Mathlib/RingTheory/GradedAlgebra/Noetherian.lean,Mathlib/RingTheory/GradedAlgebra/Radical.lean,Mathlib/RingTheory/GradedAlgebra/Subgrading.lean,Mathlib/RingTheory/Polynomial/Hilbert.lean,Mathlib/RingTheory/PowerSeries/Basic.lean,Mathlib/RingTheory/PowerSeries/WellKnown.lean 25 2 ['FMLJohn', 'github-actions'] nobody
348-72552
11 months ago
unknown
0-0
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14348 eric-wieser
author:eric-wieser
 perf: disable the `unusedVariables` linter for speed I doubt we want to merge this, but it shaves two minutes of the lint time. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) performance-hack 1/0 lakefile.lean 1 3 ['eric-wieser', 'github-actions', 'leanprover-bot'] nobody
348-72436
11 months ago
unknown
0-0
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13543 adomani
author:adomani
 test: automatically undeprecate A test for `update_deprecations`. There are two files with deprecated declarations, but CI automatically fixes them, so that they pass the noisy tests (as well as passing fail-on-warning `lake build`). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-linter 345/4 .github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build.yml.in,.github/workflows/build_fork.yml,Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/UpdateDeprecations.lean,Mathlib/test_depr.lean,Mathlib/test_depr_no_change.lean,lakefile.lean,scripts/update_deprecations.lean,test/UpdateDeprecations.lean 12 0 [] nobody
348-72403
11 months ago
unknown
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14932 eric-wieser
author:eric-wieser
 chore: add nndist versions of lemmas --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-analysis 108/1 Mathlib/Analysis/InnerProductSpace/Basic.lean,Mathlib/Geometry/Euclidean/Basic.lean 2 1 ['github-actions'] nobody
348-72216
11 months ago
unknown
0-0
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18202 ADedecker
author:ADedecker
 chore: refactor algebraic filter bases --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology t-algebra
label:t-algebra$
 1086/1315 Mathlib/Analysis/Distribution/SchwartzSpace.lean,Mathlib/Analysis/LocallyConvex/AbsConvex.lean,Mathlib/Analysis/LocallyConvex/Barrelled.lean,Mathlib/Analysis/LocallyConvex/WeakDual.lean,Mathlib/Analysis/LocallyConvex/WithSeminorms.lean,Mathlib/Analysis/Normed/Operator/WeakOperatorTopology.lean,Mathlib/FieldTheory/KrullTopology.lean,Mathlib/RingTheory/DedekindDomain/FiniteAdeleRing.lean,Mathlib/Topology/Algebra/FilterBasis.lean,Mathlib/Topology/Algebra/Module/UniformConvergence.lean,Mathlib/Topology/Algebra/Nonarchimedean/AdicTopology.lean,Mathlib/Topology/Algebra/Nonarchimedean/Bases.lean,Mathlib/Topology/Algebra/UniformFilterBasis.lean,Mathlib/Topology/Algebra/Valued/ValuationTopology.lean 14 1 ['github-actions'] nobody
347-64887
11 months ago
unknown
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22488 smmercuri
author:smmercuri
 fix: lower priority for `UniformSpace.Completion.instSMul` Following the introduction of the `WithVal` type synonym in #22055 the following instance takes a long time to synthesise in FLT, and times out in the default heartbeats ```lean import Mathlib namespace IsDedekindDomain.HeightOneSpectrum variable (A K : Type*) [CommRing A] [Field K] [Algebra A K] [IsFractionRing A K] [IsDedekindDomain A] (v : HeightOneSpectrum A) #synth SMul (v.adicCompletionIntegers K) (v.adicCompletion K) ``` The issue is that `UniformSpace.Completion.instSMul (v.adicCompletionIntegers K) (v.adicCompletion K)` now fires during the start of instance search (because we now have `UniformSpace (WithVal (v.valuation K))` whereas previously this would be `UniformSpace K`, which was not automatic), and this takes a long time to fail (leading to ~1400 entries in the trace). The first few lines of the new trace is ```lean [Meta.synthInstance] [5.512418] ✅️ SMul (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▼ [] [0.000118] new goal SMul (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [] [0.000537] ✅️ apply UniformSpace.Completion.instSMul to SMul (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [] [0.004411] ✅️ apply @WithVal.instSMul to SMul (↥(adicCompletionIntegers K v)) (WithVal (valuation K v)) ▶ [] [0.000765] ❌️ apply @GradedMonoid.GradeZero.smul to SMul (↥(adicCompletionIntegers K v)) K ▶ [] [0.000378] ✅️ apply @Algebra.toSMul to SMul (↥(adicCompletionIntegers K v)) K ▶ ... [] 1339 more entries... ▶ ``` Lowering the priority of `UniformSpace.Completion.instSMul` fixes this particular issue, leading to a trace that matches that seen prior to the introduction of `WithVal`: ```lean [Meta.synthInstance] [0.016405] ✅️ SMul (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▼ [] [0.000119] new goal SMul (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [] [0.000491] ❌️ apply @GradedMonoid.GradeZero.smul to SMul (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [] [0.000403] ✅️ apply @Algebra.toSMul to SMul (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [] [0.000134] ❌️ apply inst✝⁴ to Algebra (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [] [0.000093] ❌️ apply inst✝⁵ to Algebra (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [] [0.000077] ❌️ apply inst✝⁷ to Algebra (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [] [0.000082] ❌️ apply inst✝⁹ to Algebra (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [] [0.000075] ❌️ apply inst✝¹² to Algebra (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [] [0.000220] ❌️ apply Algebra.id to Algebra (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [] [0.001015] ✅️ apply @ValuationSubring.instAlgebraSubtypeMem to Algebra (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [resume] [0.000038] propagating Algebra (↥(adicCompletionIntegers K v)) (adicCompletion K v) to subgoal Algebra (↥(adicCompletionIntegers K v)) (adicCompletion K v) of SMul (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [check] [0.013358] ✅️ Algebra.toSMul [] result Algebra.toSMul ``` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-topology FLT 1/1 Mathlib/Topology/Algebra/UniformMulAction.lean 1 10 ['github-actions', 'leanprover-bot', 'smmercuri', 'urkud'] nobody
347-56220
11 months ago
353-84772
353 days ago
55-70108
55 days
15161 adomani
author:adomani
 feat(Linter): flag `intros x y` which can be replaced by `intro x y` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-linter 78/1 Mathlib/Tactic/Linter/Lint.lean,test/Lint.lean 2 4 ['adomani', 'github-actions', 'grunweg'] nobody
347-27288
11 months ago
unknown
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15654 TpmKranz
author:TpmKranz
 feat(Computability): language-preserving maps between NFA and RE Map REs to NFAs via Thompson's construction and NFAs to REs using GNFAs Last chunk of #12648 --- - [ ] depends on: #15651 - [ ] depends on: #15649 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR new-contributor t-computability merge-conflict awaiting-zulip 985/2 Mathlib.lean,Mathlib/Computability/GNFA.lean,Mathlib/Computability/Language.lean,Mathlib/Computability/NFA.lean,Mathlib/Computability/RegularExpressions.lean,Mathlib/Data/FinEnum/Option.lean,docs/references.bib 7 3 ['github-actions', 'leanprover-community-mathlib4-bot', 'meithecatte'] nobody
346-19685
11 months ago
615-42870
615 days ago
0-179
2 minutes
19315 quangvdao
author:quangvdao
 feat(Data/Finsupp/Fin): Add `Finsupp` operations on `Fin` tuple This PR adds more analogues of operations on `Fin` tuples to the `Finsupp` setting. Before, there were only `Finsupp.cons` and `Finsupp.tail`. Now there are also `Finsupp.snoc`, `Finsupp.insertNth`, `Finsupp.init`, and `Finsupp.removeNth`. These all come with supporting lemmas. I also removed the porting comment about `succAboveCases` in `Data/Fin/Basic`, and added a lemma about `succAbove` in `Data/Fin/Tuple/Basic`. --- - [x] depends on: #20361 - [x] depends on: #20771 - [x] depends on: #20770 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-data 193/16 Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Algebra/BigOperators/Finsupp.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Data/Finsupp/Fin.lean,Mathlib/RingTheory/MvPolynomial/Homogeneous.lean,scripts/nolints_prime_decls.txt 6 44 ['YaelDillies', 'github-actions', 'j-loreaux', 'kbuzzard', 'mathlib4-dependent-issues-bot', 'quangvdao'] nobody
345-21646
11 months ago
422-46669
422 days ago
43-81252
43 days
19464 adomani
author:adomani
 test: removed merge-conflict --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP CI delegated 22/1 .github/workflows/PR_summary.yml,scripts/zulip_emoji_merge_delegate.py 2 10 ['adomani', 'github-actions', 'leanprover-community-bot-assistant'] nobody
344-32970
11 months ago
unknown
0-0
0 seconds
24155 eric-wieser
author:eric-wieser
 feat: add a "rw_proc" for fin vectors This seems a little nicer than an elaborator, since it means I can use the default elaboration rules to handle my first few variables. Ideally there would be something like ```lean rw_procQ {A : Type u} {B : A -> Type v} (a : A) (b : B a) : b = ?rhs => do /-- Context: u v : Level A : Q(Type u) B : Q($A -> Type v) a : Q($A) b : Q($B $a) rhs : Q($B $a) -- metavariable to assign |- MetaM Q($b = ?rhs) -/ ``` or ```lean rw_proc {A : Type u} {B : A -> Type v} (a : A) (b : B a) : b = ?rhs => do /-- Context: u v : Level A B a b : Expr rhs : MVarId |- MetaM Expr -/ ``` which would generate the code I wrote here --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author RFC t-data t-meta 27/2 Mathlib/Data/Fin/Tuple/Reflection.lean 1 2 ['github-actions', 'urkud'] nobody
343-17526
11 months ago
343-17526
343 days ago
20-83091
20 days
21276 GabinKolly
author:GabinKolly
 feat(ModelTheory/Substructures): define equivalences between equal substructures Define first-order equivalences between equal substructures, and prove related properties. --- This is some preparatory work for #18876 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-logic 62/0 Mathlib/ModelTheory/Substructures.lean 1 19 ['GabinKolly', 'YaelDillies', 'fpvandoorn', 'github-actions', 'grunweg'] nobody
342-39720
11 months ago
342-39720
342 days ago
46-55730
46 days
24008 meithecatte
author:meithecatte
 chore(EpsilonNFA): replace manual lemmas with @[simps] --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability awaiting-author new-contributor 2/24 Mathlib/Computability/EpsilonNFA.lean 1 2 ['YaelDillies', 'github-actions', 'urkud'] nobody
340-65264
11 months ago
340-65264
340 days ago
27-52316
27 days
24642 grunweg
author:grunweg
 WIP-feat: add layercake formula for ENNReal-valued functions Not much to see here yet; some significant amount of work remains. --- - [ ] depends on: #24643 - [ ] depends on: #24640 (based on that PR for simplicity) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP carleson t-analysis 189/24 Mathlib/Analysis/SpecialFunctions/Pow/Integral.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Function/LpSpace/Basic.lean,Mathlib/MeasureTheory/Integral/Layercake.lean 4 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
339-41645
11 months ago
unknown
0-0
0 seconds
21712 grunweg
author:grunweg
 chore: generalise more lemmas to `ContinuousENorm` --- - [x] depends on: #21781 (minor drive-by clean-up) - [x] depends on: #21670 - [x] depends on: #22708 (extracted from this) - some parts depend on #21433 (or better: #22175); when the dependent PR has landed, I will re-assess whether to split these into a separate PR [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict carleson awaiting-CI t-measure-probability 76/31 Mathlib/Analysis/Normed/MulAction.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Function/LpSpace/Basic.lean,Mathlib/MeasureTheory/Function/LpSpace/ContinuousFunctions.lean 4 5 ['github-actions', 'grunweg', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
338-63329
11 months ago
unknown
0-0
0 seconds
21375 grunweg
author:grunweg
 WIP: generalise lemmas to ENorm This work is part of (and a necessary pre-requisite for) the Carleson project. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP awaiting-CI t-measure-probability carleson merge-conflict 471/221 Mathlib/Analysis/NormedSpace/IndicatorFunction.lean,Mathlib/MeasureTheory/Function/L2Space.lean,Mathlib/MeasureTheory/Function/LocallyIntegrable.lean,Mathlib/MeasureTheory/Function/LpOrder.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Function/LpSeminorm/ChebyshevMarkov.lean,Mathlib/MeasureTheory/Function/LpSeminorm/CompareExp.lean,Mathlib/MeasureTheory/Function/LpSeminorm/TriangleInequality.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Trim.lean,Mathlib/MeasureTheory/Function/LpSpace.lean,Mathlib/MeasureTheory/Function/SimpleFuncDenseLp.lean,Mathlib/MeasureTheory/Function/UniformIntegrable.lean,Mathlib/Probability/Independence/Integrable.lean 13 2 ['fpvandoorn', 'grunweg'] nobody
338-57704
11 months ago
unknown
0-0
0 seconds
24378 urkud
author:urkud
 feat(Algebra/Order/Field/Basic): generalize lemmas ... from linear ordered semifields to (commutative) groups with zero. --- I'm going to do another round of generalizing today or tomorrow, so making it a draft PR for now. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 183/181 Archive/OxfordInvariants/Summer2021/Week3P1.lean,Mathlib/Algebra/Order/Field/Basic.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Algebra/Order/Floor/Semiring.lean,Mathlib/Algebra/Order/GroupWithZero/Unbundled/Basic.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/Asymptotics/Lemmas.lean,Mathlib/Analysis/CStarAlgebra/ApproximateUnit.lean,Mathlib/Analysis/Calculus/BumpFunction/Basic.lean,Mathlib/Analysis/Calculus/BumpFunction/FiniteDimension.lean,Mathlib/Analysis/Calculus/BumpFunction/InnerProduct.lean,Mathlib/Analysis/Complex/AbelLimit.lean,Mathlib/Analysis/Complex/Hadamard.lean,Mathlib/Analysis/Convex/Segment.lean,Mathlib/Analysis/Convex/SpecificFunctions/Basic.lean,Mathlib/Analysis/Convex/SpecificFunctions/Pow.lean,Mathlib/Analysis/Convex/StrictConvexSpace.lean,Mathlib/Analysis/Convex/Uniform.lean,Mathlib/Analysis/Convex/Visible.lean,Mathlib/Analysis/Fourier/RiemannLebesgueLemma.lean,Mathlib/Analysis/FunctionalSpaces/SobolevInequality.lean,Mathlib/Analysis/MeanInequalitiesPow.lean,Mathlib/Analysis/Normed/Field/Lemmas.lean,Mathlib/Analysis/Normed/Field/Ultra.lean,Mathlib/Analysis/Normed/Unbundled/SmoothingSeminorm.lean,Mathlib/Analysis/NormedSpace/HomeomorphBall.lean,Mathlib/Analysis/NormedSpace/OperatorNorm/NormedSpace.lean,Mathlib/Analysis/NormedSpace/Pointwise.lean,Mathlib/Analysis/SpecialFunctions/Complex/Arg.lean,Mathlib/Analysis/SpecialFunctions/Gamma/Beta.lean,Mathlib/Analysis/SpecialFunctions/Log/Deriv.lean,Mathlib/Analysis/SpecialFunctions/MulExpNegMulSqIntegral.lean,Mathlib/Analysis/SpecialFunctions/SmoothTransition.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Bounds.lean,Mathlib/Analysis/SpecificLimits/Basic.lean,Mathlib/Analysis/SpecificLimits/FloorPow.lean,Mathlib/Analysis/SpecificLimits/Normed.lean,Mathlib/Combinatorics/Additive/AP/Three/Behrend.lean,Mathlib/Combinatorics/Schnirelmann.lean,Mathlib/Combinatorics/SimpleGraph/Regularity/Chunk.lean,Mathlib/Computability/AkraBazzi/AkraBazzi.lean,Mathlib/Computability/AkraBazzi/GrowsPolynomially.lean,Mathlib/Data/Nat/Cast/Order/Field.lean,Mathlib/Data/Real/Archimedean.lean,Mathlib/Data/Real/Cardinality.lean,Mathlib/Data/Real/Pi/Wallis.lean,Mathlib/Geometry/Euclidean/Angle/Unoriented/Affine.lean,Mathlib/Geometry/Euclidean/Angle/Unoriented/RightAngle.lean,Mathlib/Geometry/Euclidean/Sphere/Tangent.lean,Mathlib/MeasureTheory/Function/StronglyMeasurable/Basic.lean,Mathlib/MeasureTheory/Function/UniformIntegrable.lean,Mathlib/MeasureTheory/Integral/CircleIntegral.lean,Mathlib/MeasureTheory/Integral/MeanInequalities.lean,Mathlib/MeasureTheory/Integral/PeakFunction.lean,Mathlib/MeasureTheory/Measure/SeparableMeasure.lean,Mathlib/NumberTheory/Bertrand.lean,Mathlib/NumberTheory/ClassNumber/AdmissibleAbs.lean,Mathlib/NumberTheory/DiophantineApproximation/Basic.lean,Mathlib/NumberTheory/LSeries/Injectivity.lean,Mathlib/NumberTheory/LSeries/ZMod.lean,Mathlib/NumberTheory/NumberField/Discriminant/Basic.lean,Mathlib/NumberTheory/Padics/Hensel.lean,Mathlib/NumberTheory/Padics/MahlerBasis.lean,Mathlib/NumberTheory/Pell.lean,Mathlib/NumberTheory/Transcendental/Liouville/LiouvilleNumber.lean,Mathlib/Order/Filter/AtTopBot/Floor.lean,Mathlib/Order/Interval/Set/IsoIoo.lean,Mathlib/Probability/StrongLaw.lean,Mathlib/RingTheory/Perfection.lean,Mathlib/Topology/ContinuousMap/Polynomial.lean,Mathlib/Topology/Instances/AddCircle.lean,Mathlib/Topology/UrysohnsLemma.lean 72 3 ['github-actions', 'leanprover-community-bot-assistant'] nobody
338-42034
11 months ago
355-84986
355 days ago
0-14
14 seconds
24618 b-mehta
author:b-mehta
 feat(Analysis): add Schur inequality and variants Add Schur inequality and some of its common variants. TODO: - [x] add reference to source: https://www.cip.ifi.lmu.de/~grinberg/VornicuS.pdf - [ ] add other generalisations - [ ] move some of the lemmas elsewhere --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-analysis 145/0 Mathlib/Analysis/Convex/Schur.lean 1 16 ['b-mehta', 'eric-wieser', 'github-actions'] nobody
337-52797
11 months ago
346-32799
346 days ago
0-2
2 seconds
15115 kkytola
author:kkytola
 feat: Generalize assumptions in liminf and limsup results in ENNReals In a [review comment](https://github.com/leanprover-community/mathlib4/pull/13938#discussion_r1649744441) it was pointed out that results about liminf and limsup in ENNReal hold under milder assumptions. This PR does the generalization. --- This PR is split off from #13938, where the review comment was made. The changes needed for the suggested generalization were of different kind than the simple PR's content, justifying a separate PR. - [x] depends on: #13938 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order merge-conflict help-wanted awaiting-author t-topology 215/27 Mathlib/MeasureTheory/Measure/Portmanteau.lean,Mathlib/Order/LiminfLimsup.lean,Mathlib/Topology/Instances/ENNReal.lean 3 8 ['Ruben-VandeVelde', 'github-actions', 'grunweg', 'j-loreaux', 'kkytola', 'leanprover-community-mathlib4-bot'] nobody
336-54039
11 months ago
582-46857
582 days ago
21-25493
21 days
8495 jjaassoonn
author:jjaassoonn
 feat : Tensor-Hom adjunction in the category of modules # Tensor-Hom adjunction Let $R$ be a commutative ring and $S$ any ring. Let $X$ be an $(S,R)$-bimoule. Then the tensor functor $(X \otimes_R \cdot)$ is a functor from left $R$-modules to left $S$-modules; and the hom-functor $Hom_S(X, \cdot)$ is a functor from left $S$-modules to left $R$-modules. For another left $S$-module $Y$, the left $R$-module structure of $Hom_S(X, Y)$ is given by $s \cdot f := x \mapsto f(s \cdot x)$. These two functors are adjoint.. In particular we have that ```math {\rm Hom}_{S}(X\otimes_R Y, Z) \cong {\rm Hom}_R (Y, {\rm Hom}_S (X, Z)) ``` ## Implementation notes 1. Why not use the `Mathlib/LinearAlgebra/TensorProduct/Tower.lean` In our setting `X` is an `(R, S)` bimodule and `Y` an `R`-module and `Z` an `S`-module so to use the `Tower` file, we need `S` to be an `R`-algebra which is a luxury we do not have. But note that in `Tower` file, `curry` and `uncurry` are both tri-linear maps. So `Tower` file allows interplay of 3 rings which is not allowed in this file. 2. We require `R` to be commutative but we never used anything commutative. This is because of tensor product requires commutativity, but thanks to @alreadydone, this assumption could be removed soon. I think this PR should wait for Junyan's attempt on removing commutativity, so it is marked as draft and wip for now --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP awaiting-author t-algebra
label:t-algebra$
 214/0 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/TensorHomAdjunction.lean 2 88 ['alreadydone', 'bustercopley', 'eric-wieser', 'github-actions', 'jjaassoonn', 'kbuzzard', 'kim-em', 'leanprover-community-bot-assistant'] eric-wieser
assignee:eric-wieser
334-48575
10 months ago
878-72930
878 days ago
1-57685
1 day
19284 adomani
author:adomani
 test: commit a change only to the "master" CI build action This PR should fail CI, since the main CI build file is incompatible with the autogenerated ones. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author CI 3/3 .github/build.in.yml,.github/workflows/actionlint.yml 2 12 ['adomani', 'bryangingechen', 'github-actions', 'jcommelin', 'leanprover-community-bot-assistant'] bryangingechen
assignee:bryangingechen
332-79979
10 months ago
451-53767
451 days ago
61-913
61 days
15254 yuma-mizuno
author:yuma-mizuno
 feat(CategoryTheory/Monoidal): replace `Mon_` lemmas with `Mon_Class` lemmas We redefine algebras internal to monoidal categories, which were defined by full-bundled structures, in terms of semi-bundled type classes. The original full-bundled structure `X` is renamed to `X_Cat`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-category-theory 3982/96 Mathlib.lean,Mathlib/CategoryTheory/Monoidal/Bimod_Class.lean,Mathlib/CategoryTheory/Monoidal/Bimon_.lean,Mathlib/CategoryTheory/Monoidal/Bimon_Class copy.lean,Mathlib/CategoryTheory/Monoidal/Bimon_Class.lean,Mathlib/CategoryTheory/Monoidal/Braided/Opposite.lean,Mathlib/CategoryTheory/Monoidal/CommMon_Class.lean,Mathlib/CategoryTheory/Monoidal/Comon_.lean,Mathlib/CategoryTheory/Monoidal/Comon_Class.lean,Mathlib/CategoryTheory/Monoidal/Internal/ModuleClass.lean,Mathlib/CategoryTheory/Monoidal/Mod_Class.lean,Mathlib/CategoryTheory/Monoidal/Mon_.lean,Mathlib/CategoryTheory/Monoidal/Mon_Class.lean,Mathlib/CategoryTheory/Monoidal/mwe.lean 14 6 ['YaelDillies', 'github-actions', 'leanprover-community-bot-assistant', 'yuma-mizuno'] nobody
329-19150
10 months ago
unknown
0-0
0 seconds
23489 plp127
author:plp127
 chore: fix recursors Replace motive with `motive` and other improvements. Will probably split this PR after fixing is done. 4013 recursors left --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 4255/172 Mathlib/Algebra/EuclideanDomain/Basic.lean,Mathlib/Algebra/EuclideanDomain/Defs.lean,Mathlib/Algebra/Free.lean,Mathlib/Algebra/FreeMonoid/Basic.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Lie/BaseChange.lean,Mathlib/Algebra/Lie/IdealOperations.lean,Mathlib/Algebra/Lie/TraceForm.lean,Mathlib/Algebra/Order/Rearrangement.lean,Mathlib/Algebra/Ring/Subsemiring/Basic.lean,Mathlib/AlgebraicTopology/SimplexCategory/GeneratorsRelations/Basic.lean,Mathlib/Analysis/BoxIntegral/Partition/SubboxInduction.lean,Mathlib/CategoryTheory/Quotient.lean,Mathlib/Data/Fin/Basic.lean,Mathlib/Data/Fin/Tuple/Basic.lean,Mathlib/Data/Fin/Tuple/BubbleSortInduction.lean,Mathlib/Data/Fin/Tuple/NatAntidiagonal.lean,Mathlib/Data/FinEnum/Option.lean,Mathlib/Data/Finset/Max.lean,Mathlib/Data/Fintype/CardEmbedding.lean,Mathlib/Data/Fintype/Option.lean,Mathlib/Data/NNRat/Defs.lean,Mathlib/Data/Nat/BinaryRec.lean,Mathlib/Data/PFun.lean,Mathlib/Data/PFunctor/Multivariate/W.lean,Mathlib/Data/Quot.lean,Mathlib/Data/Sym/Sym2.lean,Mathlib/GroupTheory/Congruence/Defs.lean,Mathlib/GroupTheory/Coprod/Basic.lean,Mathlib/GroupTheory/Coset/Defs.lean,Mathlib/GroupTheory/Coxeter/Basic.lean,Mathlib/LinearAlgebra/Span/Defs.lean,Mathlib/LinearAlgebra/TensorProduct/Tower.lean,Mathlib/NumberTheory/LSeries/HurwitzZetaEven.lean,Mathlib/NumberTheory/LSeries/HurwitzZetaOdd.lean,Mathlib/Order/DirectedInverseSystem.lean,Mathlib/RingTheory/AdicCompletion/Basic.lean,Mathlib/SetTheory/Cardinal/Defs.lean,Mathlib/SetTheory/PGame/Algebra.lean,done.csv,print.lean,working.csv 42 3 ['github-actions', 'leanprover-community-bot-assistant'] nobody
326-49868
10 months ago
unknown
0-0
0 seconds
23349 BGuillemet
author:BGuillemet
 feat: add LocallyLipschitzOn.lipschitzOnWith_of_isCompact and two small lemmas about Lipschitz functions Main feat (in Mathlib/Topology/EMetricSpace/Basic.lean): if a function `f` from an extended pseudometric space to a pseudometric space is locally Lipschitz on a compact subset `s`, then `f` is Lipschitz on `s`. The theorem is true only when the codomain of `f` is a pseudometric space, so it needs imports from Mathlib/Topology/MetricSpace. Other small feat (in Mathlib/Analysis/Calculus/ContDiff/RCLike.lean): a function that is continuously differentiable on an open subset is locally Lipschitz on this subset. --- - [ ] depends on: #22890 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology large-import new-contributor 59/4 Mathlib/Analysis/Calculus/ContDiff/RCLike.lean,Mathlib/Topology/EMetricSpace/Lipschitz.lean 2 4 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] PatrickMassot
assignee:PatrickMassot
324-37605
10 months ago
324-37607
324 days ago
35-30364
35 days
12438 jjaassoonn
author:jjaassoonn
 feat: some APIs for flat modules Need horseshoe lemma --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-category-theory 1674/3 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Symmetric.lean,Mathlib/Algebra/Exact.lean,Mathlib/CategoryTheory/Abelian/Basic.lean,Mathlib/CategoryTheory/Abelian/DiagramLemmas/Horseshoe.lean,Mathlib/CategoryTheory/Abelian/LeftDerived.lean,Mathlib/RingTheory/Flat/Basic.lean 8 21 ['erdOne', 'github-actions', 'jjaassoonn', 'joelriou'] nobody
319-50231
10 months ago
721-13102
721 days ago
0-20
20 seconds
17715 adomani
author:adomani
 feat: the unusedVariableCommand linter This is still work-in-progress, but also help-wanted! The linter reliably flags unused variables: so far, only `example`s fool it (and that is simply because I did not implement a fix, as there are very few `variable`s that are only used in `example`s in mathlib). The work-in-progress part refers to the fact that the linter uses an `IO.Ref` to keep track of variables and this does not work well with editing the file. The linter works on a fresh parse of a file, but becomes out-of-sync with every edit. The help-wanted is to ask for help to make mathlib compliant with the linter, by checking out this branch and PR-ing a few variable removals! [Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/Unused.20variables) --- Known issues: * automatic namespacing and `nonrec` may cause difficulty when the newly introduced declaration is preferred in the term, rather than the original one (see examples here ```bash code -r -g ././././Mathlib/Analysis/SpecialFunctions/Arsinh.lean:183 code -r -g ././././Mathlib/Probability/Independence/Basic.lean:368 ``` where, for instance, `ContinuousOn.arsinh` is used internally instead of `Real.arsinh`). * `mutual` declarations confuse the linter ```bash code -r -g ././././Mathlib/SetTheory/Lists.lean:313 ``` * `code -r -g Mathlib/CategoryTheory/EffectiveEpi/Comp.lean:133:29` * universe annotations confuse the linter: ```bash code -r -g ././././Mathlib/Topology/Category/CompactlyGenerated.lean:53 code -r -g ././././Mathlib/AlgebraicTopology/CechNerve.lean:46 ``` * `inductive`s confusing the linter ```bash code -r -g ././././Mathlib/Deprecated/Subgroup.lean:389 code -r -g ././././Mathlib/FieldTheory/PerfectClosure.lean:55 ``` * `def`s confusing the linter ```bash code -r -g ././././Mathlib/Data/MLList/BestFirst.lean:104 ``` * special typeclass assumptions ```code code -r -g ././././Mathlib/RingTheory/WittVector/Truncated.lean:273 code -r -g ././././Mathlib/Topology/Category/Profinite/Product.lean:79 ``` * not sure what is going on here: ```bash code -r -g ././././Mathlib/RingTheory/WittVector/IsPoly.lean:95 code -r -g ././././Mathlib/Probability/Independence/Basic.lean:368 code -r -g ././././Mathlib/Analysis/Calculus/FDeriv/Star.lean:30 ``` [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-linter large-import 695/22 Mathlib.lean,Mathlib/Algebra/Group/Idempotent.lean,Mathlib/Algebra/GroupWithZero/Idempotent.lean,Mathlib/Data/Finite/Defs.lean,Mathlib/Data/Int/Cast/Field.lean,Mathlib/Geometry/Manifold/IntegralCurve/ExistUnique.lean,Mathlib/Init.lean,Mathlib/MeasureTheory/Function/LpSpace/DomAct/Continuous.lean,Mathlib/NumberTheory/LSeries/PrimesInAP.lean,Mathlib/Order/BoundedOrder/Basic.lean,Mathlib/Order/BoundedOrder/Lattice.lean,Mathlib/Order/BoundedOrder/Monotone.lean,Mathlib/Order/Monotone/Monovary.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/UnusedVariableCommand.lean,MathlibTest/UnusedVariableCommand.lean,lakefile.lean 17 3 ['github-actions', 'grunweg', 'leanprover-community-bot-assistant'] nobody
317-44989
10 months ago
550-10022
550 days ago
0-92
1 minute
25473 adomani
author:adomani
 feat(CI): check that Mathlib files have lean or md extension Twice recently there have been files with an "intended" `.lean` extension in `Mathlib/`: * #24942, ending in `;lean`; * #25457, ending in `.Lean`. `mk_all` does not add these files to `Mathlib.lean`, since they do not end in `.lean` and this later causes problems. This CI step checks that all files in `Mathlib/` end with `.lean` or `.md`. See #25474 for a test where the new step [correctly fails](https://github.com/leanprover-community/mathlib4/actions/runs/15464097783/job/43532018379?pr=25474). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI delegated 10/0 .github/workflows/lint_and_suggest_pr.yml 1 10 ['adomani', 'bryangingechen', 'github-actions', 'grunweg', 'mathlib-bors'] nobody
315-54172
10 months ago
315-55063
315 days ago
0-10787
2 hours
16020 adomani
author:adomani
 feat: compare PR `olean`s size with `master` Adds two CI steps: * `print the sizes of the oleans` that prints the sizes of all the folders containing `Mathlib` `.olean`s; * `compare oleans` that compares the sizes of the previous step with the corresponding sizes on `master`. In the test runs, the two steps have taken at most 3 seconds combined (the first is virtually instantaneous, the second one depends on `curl` to find a job id and on `gh` to retrieve the logs of a previous CI run -- everything else appears to be negligible). This hopefully helps finding out if some PR is bloating up the `.olean`s. See [this Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Error.3A.20No.20space.20left.20on.20device/near/463792355) for a PR of mine that prompted this check. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict CI 120/0 .github/build.in.yml,.github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build_fork.yml,scripts/olean_comparison.sh 5 50 ['Vtec234', 'YaelDillies', 'adomani', 'bryangingechen', 'github-actions', 'grunweg', 'kim-em', 'leanprover-community-bot-assistant', 'mattrobball'] nobody
315-1212
10 months ago
512-48553
512 days ago
87-65922
87 days
16062 adomani
author:adomani
 Test/ci olean size Tests for oleans --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP awaiting-author CI 114/0 .github/build.in.yml,.github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build_fork.yml,scripts/olean_comparison.sh 5 4 ['Parcly-Taxel', 'adomani', 'github-actions', 'leanprover-community-bot-assistant'] nobody
315-1212
10 months ago
602-62192
602 days ago
0-16
16 seconds
12799 jstoobysmith
author:jstoobysmith
 feat(LinearAlgebra/UnitaryGroup): Add properties of Special Unitary Group Add properties of the special unitary group, mirroring the properties of found in Algebra/Star/Unitary.lean. In particular, I add an instance of `specialUnitaryGroup` as a `Group`, `Star`, `InvolutiveStar`, and `StarMul`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt t-algebra new-contributor merge-conflict awaiting-author
label:t-algebra$
 78/0 Mathlib/LinearAlgebra/UnitaryGroup.lean 1 8 ['chrisflav', 'jcommelin', 'leanprover-community-bot-assistant'] nobody
314-9558
10 months ago
697-37211
697 days ago
9-22045
9 days
23709 plp127
author:plp127
 feat: `Nat.findFrom` This PR adds `Nat.findFrom`, which is like `Nat.find`, but starting from an arbitrary `k` instead of `0`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 190/47 Mathlib/Data/Nat/Find.lean 1 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
313-61247
10 months ago
375-52925
375 days ago
0-7729
2 hours
25340 dupuisf
author:dupuisf
 chore(Analysis/Convex): move files pertaining to convex/concave functions to their own folder This PR creates a new folder under `Analysis/Convex` called `Analysis/Convex/Function`, which includes files that are mostly or entirely about convex/concave functions (as opposed to convex sets). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-convex-geometry 4264/4155 Mathlib.lean,Mathlib/Analysis/Convex/Continuous.lean,Mathlib/Analysis/Convex/Deriv.lean,Mathlib/Analysis/Convex/Exposed.lean,Mathlib/Analysis/Convex/Extrema.lean,Mathlib/Analysis/Convex/Function.lean,Mathlib/Analysis/Convex/Function/Basic.lean,Mathlib/Analysis/Convex/Function/Continuous.lean,Mathlib/Analysis/Convex/Function/Deriv.lean,Mathlib/Analysis/Convex/Function/Extrema.lean,Mathlib/Analysis/Convex/Function/Integral.lean,Mathlib/Analysis/Convex/Function/Jensen.lean,Mathlib/Analysis/Convex/Function/Mul.lean,Mathlib/Analysis/Convex/Function/Piecewise.lean,Mathlib/Analysis/Convex/Function/Quasiconvex.lean,Mathlib/Analysis/Convex/Function/Slope.lean,Mathlib/Analysis/Convex/Function/Strong.lean,Mathlib/Analysis/Convex/Integral.lean,Mathlib/Analysis/Convex/Jensen.lean,Mathlib/Analysis/Convex/Mul.lean,Mathlib/Analysis/Convex/Piecewise.lean,Mathlib/Analysis/Convex/Quasiconvex.lean,Mathlib/Analysis/Convex/Slope.lean,Mathlib/Analysis/Convex/SpecificFunctions/Basic.lean,Mathlib/Analysis/Convex/SpecificFunctions/Deriv.lean,Mathlib/Analysis/Convex/Strong.lean,Mathlib/Analysis/MeanInequalities.lean,Mathlib/Analysis/MeanInequalitiesPow.lean,Mathlib/Analysis/Normed/Module/Convex.lean,Mathlib/Analysis/Seminorm.lean,Mathlib/Analysis/SpecialFunctions/Log/NegMulLog.lean,Mathlib/Analysis/SpecialFunctions/Pochhammer.lean,Mathlib/MeasureTheory/Measure/Decomposition/IntegralRNDeriv.lean,Mathlib/NumberTheory/Harmonic/GammaDeriv.lean 34 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
313-60432
10 months ago
313-60434
313 days ago
6-39812
6 days
21734 adomani
author:adomani
 fix(PR summary): checkout GITHUB_SHA This should make the version of the script that is used on PRs more stable. Suggested by Eric Wieser on [Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/messageFile.2Emd/near/498941855). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP awaiting-author CI 2/1 .github/workflows/PR_summary.yml 1 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
312-77099
10 months ago
429-26978
429 days ago
0-6023
1 hour
8949 sebzim4500
author:sebzim4500
 Add `by_approx` tactic for proving real inequalities using rational approximation feat: Add `by_approx` tactic for proving real inequalities by finding rational approximations --- ```lean example : |sqrt 2 - 1.414| < 0.001 := by by_approx ``` This is a work in progress, the code is messy and the tactic is often very slow. It also depends on some other PRs that haven't been merged yet. It currently supports basic operations (`+`, `-`, `*`, `/`, `abs`) and has approximation extensions for `sqrt` and `exp`. - [ ] depends on: #8167 - [x] depends on: #8832 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict modifies-tactic-syntax t-meta 1670/3 Mathlib.lean,Mathlib/Data/Int/ModEq.lean,Mathlib/Tactic.lean,Mathlib/Tactic/ByApprox.lean,Mathlib/Tactic/ByApprox/Basic.lean,Mathlib/Tactic/ByApprox/Core.lean,Mathlib/Tactic/ByApprox/Exp.lean,Mathlib/Tactic/ByApprox/Lemmas.lean,Mathlib/Tactic/ByApprox/Test.lean,Mathlib/Tactic/ByApprox/Util.lean,Mathlib/Tactic/GCongr/Core.lean,Mathlib/Tactic/GRW.lean,Mathlib/Tactic/GRW/Core.lean,Mathlib/Tactic/GRW/Lemmas.lean,Mathlib/Tactic/NormNum/NatFactorial.lean,test/ByApprox.lean,test/GRW.lean,test/norm_num_ext.lean 18 1 ['mathlib4-dependent-issues-bot'] nobody
309-14746
10 months ago
unknown
0-0
0 seconds
20334 miguelmarco
author:miguelmarco
 feat: allow polyrith to use a local Singular/Sage install Try to call a local install of Singular (either standalone or inside Sage) to find the witness for polyrith before trying to call the online sage cell server. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author new-contributor t-meta 171/48 Mathlib/Tactic/Polyrith.lean,scripts/polyrith_sage.py 2 16 ['eric-wieser', 'github-actions', 'hanwenzhu', 'kim-em', 'miguelmarco', 'mkoeppe'] nobody
307-2111
10 months ago
445-40092
445 days ago
27-62333
27 days
25911 BoltonBailey
author:BoltonBailey
 make `a / b` simp normal form This PR continues the work from #25631. Original PR: https://github.com/leanprover-community/mathlib4/pull/25631 t-algebra
label:t-algebra$
 11/1 Mathlib/Algebra/Group/Defs.lean 1 2 ['BoltonBailey', 'github-actions'] nobody
305-45860
10 months ago
unknown
0-0
0 seconds
25912 BoltonBailey
author:BoltonBailey
 feat: add simp lemmas for trig functions on `π * 2⁻¹` This PR adds a number of simp lemmas to reduce trig functions evaluated on `π * 2⁻¹`. This allows `simp` to reduce expressions such as `sin (π * (1 / 2))` --- - [ ] depends on: #25911 [experiment with simp normal form] Original PR: #24213 awaiting-author blocked-by-other-PR t-analysis 45/0 Mathlib/Analysis/SpecialFunctions/Trigonometric/Basic.lean 1 3 ['BoltonBailey', 'github-actions', 'mathlib4-dependent-issues-bot'] nobody
305-44573
10 months ago
305-45270
305 days ago
0-136
2 minutes
25918 BoltonBailey
author:BoltonBailey
 feat: one time pad string diagram This PR continues the work from #10655. Original PR: https://github.com/leanprover-community/mathlib4/pull/10655 159/0 MathlibTest/StringDiagram.lean 1 2 ['BoltonBailey', 'github-actions'] nobody
305-44004
10 months ago
unknown
0-0
0 seconds
23953 b-reinke
author:b-reinke
 feat(Data/Matroid/Tutte): define the Tutte polynomial of a matroid This PR defines the Tutte polynomial of a matroid and shows basic properties. - [x] depends on: #23926 - [ ] depends on #24336 - [ ] depends on: #23951 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-data 111/0 Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Data/Matroid/Tutte/Basic.lean,Mathlib/Data/Set/Image.lean 3 7 ['apnelson1', 'b-reinke', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
304-43591
10 months ago
unknown
0-0
0 seconds
25921 BoltonBailey
author:BoltonBailey
 feat: scripts to analyze overlap between namespaces This PR continues the work from #11385. Original PR: https://github.com/leanprover-community/mathlib4/pull/11385 WIP migrated-from-branch t-meta 86/0 scripts/RecordNamespaces.lean,scripts/namespace-overlap.py 2 1 ['github-actions'] nobody
303-31871
9 months ago
303-31887
303 days ago
2-11832
2 days
18771 joelriou
author:joelriou
 feat(LinearAlgebra/ExteriorPower): exterior powers of free modules are free Co-authored-by: sophie.morel@ens-lyon.fr --- - [ ] depends on: #18662 - [x] depends on: #18534 - [x] depends on: #18651 - [x] depends on: #18590 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra blocked-by-other-PR
label:t-algebra$
 1185/160 Mathlib.lean,Mathlib/Analysis/NormedSpace/Multilinear/Curry.lean,Mathlib/Analysis/NormedSpace/PiTensorProduct/ProjectiveSeminorm.lean,Mathlib/Data/Sum/Basic.lean,Mathlib/LinearAlgebra/ExteriorPower/Basic.lean,Mathlib/LinearAlgebra/ExteriorPower/Basis.lean,Mathlib/LinearAlgebra/ExteriorPower/Generators.lean,Mathlib/LinearAlgebra/ExteriorPower/Pairing.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/Multilinear/TensorProduct.lean,Mathlib/LinearAlgebra/PiTensorProduct/Basic.lean,Mathlib/LinearAlgebra/PiTensorProduct/Finite.lean,Mathlib/LinearAlgebra/PiTensorProduct/Generators.lean,Mathlib/LinearAlgebra/Span.lean,Mathlib/LinearAlgebra/TensorAlgebra/ToTensorPower.lean,Mathlib/LinearAlgebra/TensorPower/Basic.lean,Mathlib/LinearAlgebra/TensorPower/Pairing.lean,Mathlib/Logic/Function/Basic.lean,Mathlib/RingTheory/PiTensorProduct.lean 19 3 ['alreadydone', 'github-actions', 'mathlib4-dependent-issues-bot'] nobody
301-66728
9 months ago
unknown
0-0
0 seconds
18441 ADedecker
author:ADedecker
 refactor(AdicTopology): use new API for algebraic filter bases, and factor some code --- - [x] depends on: #18437 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology t-algebra
label:t-algebra$
 847/159 Mathlib.lean,Mathlib/Topology/Algebra/FilterBasis.lean,Mathlib/Topology/Algebra/FilterBasisNew.lean,Mathlib/Topology/Algebra/Nonarchimedean/AdicTopology.lean,Mathlib/Topology/Algebra/Nonarchimedean/Bases.lean,Mathlib/Topology/Algebra/Nonarchimedean/BasesNew.lean 6 3 ['ADedecker', 'github-actions', 'mathlib4-dependent-issues-bot'] nobody
301-52173
9 months ago
533-50072
533 days ago
0-679
11 minutes
18439 ADedecker
author:ADedecker
 refactor: use new algebraic filter bases API in `FiniteAdeleRing` --- - [x] depends on: #18437 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology t-algebra
label:t-algebra$
 699/21 Mathlib.lean,Mathlib/RingTheory/DedekindDomain/FiniteAdeleRing.lean,Mathlib/Topology/Algebra/FilterBasis.lean,Mathlib/Topology/Algebra/FilterBasisNew.lean,Mathlib/Topology/Algebra/Nonarchimedean/Bases.lean,Mathlib/Topology/Algebra/Nonarchimedean/BasesNew.lean 6 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
301-52171
9 months ago
533-51715
533 days ago
0-619
10 minutes
18438 ADedecker
author:ADedecker
 refactor: adapt `KrullTopology` to the new algebraic filter bases API --- - [x] depends on: #18437 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology t-algebra
label:t-algebra$
 771/168 Mathlib.lean,Mathlib/FieldTheory/KrullTopology.lean,Mathlib/Topology/Algebra/FilterBasis.lean,Mathlib/Topology/Algebra/FilterBasisNew.lean,Mathlib/Topology/Algebra/Nonarchimedean/Bases.lean,Mathlib/Topology/Algebra/Nonarchimedean/BasesNew.lean 6 5 ['ADedecker', 'AntoineChambert-Loir', 'github-actions', 'mathlib4-dependent-issues-bot'] nobody
301-52170
9 months ago
533-52357
533 days ago
0-638
10 minutes
26239 BoltonBailey
author:BoltonBailey
 feat: add sample pre-commit git hook file This PR adds a sample pre-commit git hook file that runs `mk_all` and `lint-style`. The script provides instructions on how to activate these as git hooks. Installing these would be optional, but hopefully people who would install them would find it easier to avoid commits that immediately fail linters. Discussion of hooks on [Zulip here](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Automatic.20setup.20and.20distribution.20of.20git.20hooks/with/525103090). Some thoughts: - Perhaps it would be better, for speed, to attempt to avoid certain commands if the staged changes suggest they would be unnecessary. - i.e. only run linters on files that have been updated / only run `mk_all` if a file has been added or deleted. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP 18/0 git_hooks/pre-commit 1 1 ['github-actions'] nobody
300-23704
9 months ago
300-23704
300 days ago
0-1331
22 minutes
13964 pechersky
author:pechersky
 feat(Data/DigitExpansion): begin defining variant of reals without rationals Based on a de Bruijn 1976 paper. This file is just the basic definition of a digit expansion. Will be followed up with further constructions. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 518/0 Mathlib.lean,Mathlib/Data/DigitExpansion/Defs.lean,docs/references.bib 3 11 ['eric-wieser', 'github-actions', 'kim-em', 'pechersky'] dupuisf
assignee:dupuisf
298-34461
9 months ago
536-60677
536 days ago
129-57999
129 days
21450 eric-wieser
author:eric-wieser
 feat: improve trace nodes for `positivity` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 25/7 Mathlib/Tactic/Positivity/Core.lean 1 1 ['github-actions'] nobody
298-20483
9 months ago
unknown
0-0
0 seconds
26327 eric-wieser
author:eric-wieser
 chore: split the tests for positivity --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 528/2 MathlibTest/Positivity/basic.lean,MathlibTest/positivity.lean 2 1 ['github-actions'] nobody
297-18500
9 months ago
unknown
0-0
0 seconds
18662 joelriou
author:joelriou
 feat(LinearAlgebra/ExteriorPower): generators of the exterior powers --- - [x] depends on: #18534 - [x] depends on: #18590 - [ ] depends on: #26464 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra blocked-by-other-PR
label:t-algebra$
 818/158 Mathlib.lean,Mathlib/Analysis/NormedSpace/Multilinear/Curry.lean,Mathlib/Analysis/NormedSpace/PiTensorProduct/ProjectiveSeminorm.lean,Mathlib/Data/Sum/Basic.lean,Mathlib/LinearAlgebra/ExteriorPower/Basic.lean,Mathlib/LinearAlgebra/ExteriorPower/Generators.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/Multilinear/TensorProduct.lean,Mathlib/LinearAlgebra/PiTensorProduct/Basic.lean,Mathlib/LinearAlgebra/PiTensorProduct/Finite.lean,Mathlib/LinearAlgebra/PiTensorProduct/Generators.lean,Mathlib/LinearAlgebra/Span.lean,Mathlib/LinearAlgebra/TensorPower.lean,Mathlib/Logic/Function/Basic.lean,Mathlib/RingTheory/PiTensorProduct.lean 15 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
293-73183
9 months ago
unknown
0-0
0 seconds
18735 joelriou
author:joelriou
 feat(Algebra/Module): presentation of the exterior power Given a presentation of a `R`-module `M`, we obtain a presentation of `⋀[R]^n M`. --- (Still one sorry left.) - [ ] depends on: #18527 - [ ] depends on: #18432 - [ ] depends on: #26464 - [ ] depends on: #18534 - [ ] depends on: #18662 - [x] depends on: #18590 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra blocked-by-other-PR
label:t-algebra$
 1856/157 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/ExteriorPower.lean,Mathlib/Algebra/Module/Presentation/Basic.lean,Mathlib/Algebra/Module/Presentation/ExteriorPower.lean,Mathlib/Algebra/Module/Presentation/PiTensor.lean,Mathlib/Algebra/Module/Presentation/Tensor.lean,Mathlib/Analysis/NormedSpace/Multilinear/Curry.lean,Mathlib/Analysis/NormedSpace/PiTensorProduct/ProjectiveSeminorm.lean,Mathlib/Data/Sum/Basic.lean,Mathlib/LinearAlgebra/ExteriorPower/Basic.lean,Mathlib/LinearAlgebra/ExteriorPower/Generators.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/Multilinear/TensorProduct.lean,Mathlib/LinearAlgebra/PiTensorProduct/Basic.lean,Mathlib/LinearAlgebra/PiTensorProduct/Finite.lean,Mathlib/LinearAlgebra/PiTensorProduct/Generators.lean,Mathlib/LinearAlgebra/Span.lean,Mathlib/LinearAlgebra/TensorPower.lean,Mathlib/Logic/Function/Basic.lean,Mathlib/RingTheory/PiTensorProduct.lean 20 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
293-69157
9 months ago
unknown
0-0
0 seconds
26581 nomeata
author:nomeata
 ignore this: Lean pr testing 9124 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 1723/1362 Archive/Arithcc.lean,Archive/Examples/Eisenstein.lean,Archive/Examples/IfNormalization/WithoutAesop.lean,Archive/Imo/Imo1972Q5.lean,Archive/Imo/Imo1975Q1.lean,Archive/Imo/Imo1987Q1.lean,Archive/Imo/Imo1994Q1.lean,Archive/Imo/Imo1998Q2.lean,Archive/Imo/Imo2006Q5.lean,Archive/Imo/Imo2008Q3.lean,Archive/Imo/Imo2024Q1.lean,Archive/Imo/Imo2024Q3.lean,Archive/Imo/Imo2024Q5.lean,Archive/MiuLanguage/DecisionNec.lean,Archive/MiuLanguage/DecisionSuf.lean,Archive/Sensitivity.lean,Archive/Wiedijk100Theorems/AbelRuffini.lean,Archive/Wiedijk100Theorems/AreaOfACircle.lean,Archive/Wiedijk100Theorems/AscendingDescendingSequences.lean,Archive/Wiedijk100Theorems/BallotProblem.lean,Archive/Wiedijk100Theorems/BuffonsNeedle.lean,Archive/Wiedijk100Theorems/CubingACube.lean,Archive/Wiedijk100Theorems/FriendshipGraphs.lean,Archive/Wiedijk100Theorems/Partition.lean,Archive/Wiedijk100Theorems/PerfectNumbers.lean,Archive/Wiedijk100Theorems/SumOfPrimeReciprocalsDiverges.lean,Archive/ZagierTwoSquares.lean,Cache/Lean.lean,Counterexamples/AharoniKorman.lean,Counterexamples/CanonicallyOrderedCommSemiringTwoMul.lean,Counterexamples/CliffordAlgebraNotInjective.lean,Counterexamples/DiscreteTopologyNonDiscreteUniformity.lean,Counterexamples/MapFloor.lean,Counterexamples/MonicNonRegular.lean,Counterexamples/Phillips.lean,Counterexamples/Pseudoelement.lean,Counterexamples/ZeroDivisorsInAddMonoidAlgebras.lean,Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/Algebra/Operations.lean,Mathlib/Algebra/Algebra/Subalgebra/Operations.lean,Mathlib/Algebra/Algebra/Subalgebra/Pointwise.lean,Mathlib/Algebra/Algebra/Unitization.lean,Mathlib/Algebra/Algebra/ZMod.lean,Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/BigOperators/Group/List/Basic.lean,Mathlib/Algebra/Category/ContinuousCohomology/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Topology/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Topology/Homology.lean,Mathlib/Algebra/Category/MonCat/FilteredColimits.lean,Mathlib/Algebra/Category/Ring/Epi.lean,Mathlib/Algebra/Category/Ring/FinitePresentation.lean,Mathlib/Algebra/Category/Ring/Topology.lean,Mathlib/Algebra/CharP/Basic.lean,Mathlib/Algebra/CharP/Defs.lean,Mathlib/Algebra/Colimit/Module.lean,Mathlib/Algebra/DirectSum/Algebra.lean,Mathlib/Algebra/DirectSum/Ring.lean,Mathlib/Algebra/DualNumber.lean,Mathlib/Algebra/Equiv/TransferInstance.lean,Mathlib/Algebra/GCDMonoid/Finset.lean,Mathlib/Algebra/Group/Action/Basic.lean,Mathlib/Algebra/Group/Basic.lean,Mathlib/Algebra/Group/End.lean,Mathlib/Algebra/Group/Pointwise/Finset/Basic.lean,Mathlib/Algebra/Group/Pointwise/Finset/Scalar.lean,Mathlib/Algebra/Group/Pointwise/Set/Basic.lean,Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/Algebra/GroupWithZero/Action/Defs.lean,Mathlib/Algebra/GroupWithZero/NonZeroDivisors.lean,Mathlib/Algebra/Lie/CartanExists.lean,Mathlib/Algebra/Lie/LieTheorem.lean,Mathlib/Algebra/Lie/Weights/Chain.lean,Mathlib/Algebra/Lie/Weights/RootSystem.lean,Mathlib/Algebra/Module/Equiv/Defs.lean,Mathlib/Algebra/Module/FinitePresentation.lean,Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/Algebra/Module/Presentation/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Defs.lean,Mathlib/Algebra/MonoidAlgebra/ToDirectSum.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Algebra/MvPolynomial/Eval.lean,Mathlib/Algebra/MvPolynomial/Variables.lean,Mathlib/Algebra/NoZeroSMulDivisors/Defs.lean,Mathlib/Algebra/Order/Antidiag/Pi.lean,Mathlib/Algebra/Order/CauSeq/Completion.lean,Mathlib/Algebra/Order/Field/Power.lean,Mathlib/Algebra/Order/Ring/Unbundled/Rat.lean,Mathlib/Algebra/Polynomial/Bivariate.lean,Mathlib/Algebra/Polynomial/Degree/CardPowDegree.lean,Mathlib/Algebra/Polynomial/HasseDeriv.lean,Mathlib/Algebra/Quaternion.lean,Mathlib/Algebra/Regular/Pi.lean,Mathlib/Algebra/Ring/Basic.lean,Mathlib/Algebra/Ring/CentroidHom.lean,Mathlib/Algebra/Ring/GrindInstances.lean,Mathlib/Algebra/Ring/Int/Defs.lean,Mathlib/Algebra/RingQuot.lean,Mathlib/Algebra/Star/NonUnitalSubalgebra.lean 567 0 [] nobody
289-50286
9 months ago
unknown
0-0
0 seconds
15213 adomani
author:adomani
 dev: add Mathlib.Tactic.Linter.ForallIntro --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-linter large-import 608/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter.lean,Mathlib/Tactic/Linter/ForallIntro.lean,MathlibTest/ForallIntro.lean 5 5 ['adomani', 'github-actions', 'grunweg', 'leanprover-community-bot-assistant'] nobody
286-2258
9 months ago
unknown
0-0
0 seconds
17458 urkud
author:urkud
 refactor(Algebra/Group): make `IsUnit` a typeclass Also change some lemmas to assume `[IsUnit _]` instead of `[Invertible _]`. Motivated by potential non-defeq diamonds in #14986, see also [Zulip](https://leanprover.zulipchat.com/#narrow/stream/116395-maths/topic/Invertible.20and.20data) I no longer plan to merge this PR, but I'm going to cherry-pick some changes to a new PR before closing this one. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra awaiting-zulip
label:t-algebra$
 82/72 Mathlib/Algebra/CharP/Invertible.lean,Mathlib/Algebra/Group/Invertible/Basic.lean,Mathlib/Algebra/Group/Units/Defs.lean,Mathlib/Algebra/GroupWithZero/Invertible.lean,Mathlib/Algebra/GroupWithZero/Units/Basic.lean,Mathlib/Algebra/Polynomial/Degree/Units.lean,Mathlib/Algebra/Polynomial/Splits.lean,Mathlib/Analysis/Convex/Segment.lean,Mathlib/Analysis/Normed/Affine/Isometry.lean,Mathlib/Analysis/Normed/Ring/Units.lean,Mathlib/CategoryTheory/Linear/Basic.lean,Mathlib/FieldTheory/Finite/Basic.lean,Mathlib/FieldTheory/Separable.lean,Mathlib/FieldTheory/SeparableDegree.lean,Mathlib/GroupTheory/Submonoid/Inverses.lean,Mathlib/LinearAlgebra/AffineSpace/AffineEquiv.lean,Mathlib/LinearAlgebra/AffineSpace/Combination.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Contraction.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Inversion.lean,Mathlib/LinearAlgebra/CliffordAlgebra/SpinGroup.lean,Mathlib/LinearAlgebra/Eigenspace/Minpoly.lean,Mathlib/NumberTheory/MulChar/Basic.lean,Mathlib/RingTheory/Localization/NumDen.lean,Mathlib/RingTheory/Polynomial/Content.lean,Mathlib/RingTheory/Polynomial/GaussLemma.lean,Mathlib/RingTheory/Valuation/Basic.lean 26 12 ['MichaelStollBayreuth', 'acmepjz', 'eric-wieser', 'github-actions', 'leanprover-bot', 'leanprover-community-bot-assistant', 'urkud'] nobody
286-34
9 months ago
557-34077
557 days ago
0-66650
18 hours
22928 javra
author:javra
 feat(CategoryTheory): infrastructure for inclusion morphisms into products in categories with 0-morphisms --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory 52/14 Mathlib/CategoryTheory/Limits/Shapes/BinaryBiproducts.lean,Mathlib/CategoryTheory/Limits/Shapes/Biproducts.lean,Mathlib/CategoryTheory/Limits/Shapes/ZeroMorphisms.lean 3 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
285-85928
9 months ago
398-50100
398 days ago
0-1295
21 minutes
22952 eric-wieser
author:eric-wieser
 refactor: reimplement `RingQuot` in terms of `RingCon.Quotient` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 157/184 Mathlib/Algebra/RingQuot.lean,Mathlib/GroupTheory/Congruence/Basic.lean,Mathlib/RingTheory/Congruence/Basic.lean,Mathlib/RingTheory/Congruence/Defs.lean 4 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
285-85927
9 months ago
unknown
0-0
0 seconds
24710 chrisflav
author:chrisflav
 chore(Data/Set): `tsum` version of `Set.encard_iUnion_of_finite` for non-finite types As requested here: https://github.com/leanprover-community/mathlib4/pull/23849#discussion_r2081070200 --- - [ ] depends on: #23849 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 163/0 Mathlib.lean,Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Data/Set/Card/Arithmetic.lean,Mathlib/Data/Set/Card/InfiniteArithmetic.lean,Mathlib/Data/Set/Finite/Lattice.lean,Mathlib/Topology/Algebra/InfiniteSum/Order.lean,Mathlib/Topology/Instances/ENat/Lemmas.lean 7 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
285-85522
9 months ago
285-85522
285 days ago
1-80465
1 day
24823 eric-wieser
author:eric-wieser
 refactor: add `hom` lemmas for the `MonoidalCategory` structure on `ModuleCat` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 148/164 Mathlib/Algebra/Category/FGModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Adjunctions.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Closed.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Symmetric.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Free.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Generator.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Monoidal.lean,Mathlib/CategoryTheory/Monoidal/Internal/Module.lean,Mathlib/RepresentationTheory/Coinvariants.lean,Mathlib/RepresentationTheory/Rep.lean 11 21 ['101damnations', 'YaelDillies', 'eric-wieser', 'github-actions', 'joelriou', 'kbuzzard', 'leanprover-community-bot-assistant'] 101damnations
assignee:101damnations
285-85521
9 months ago
285-85521
285 days ago
40-60910
40 days
25071 erdOne
author:erdOne
 feat(EllipticCurve): basic API for singular cubics --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebraic-geometry 320/0 Mathlib.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Singular/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/VariableChange.lean 3 35 ['Multramate', 'acmepjz', 'erdOne', 'github-actions', 'leanprover-community-bot-assistant'] nobody
285-85275
9 months ago
285-85276
285 days ago
45-4562
45 days
25197 eric-wieser
author:eric-wieser
 feat: Finset.sum induction for tensor products. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra large-import
label:t-algebra$
 81/0 Mathlib/LinearAlgebra/TensorProduct/Basic.lean 1 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
285-85273
9 months ago
unknown
0-0
0 seconds
25218 kckennylau
author:kckennylau
 feat(AlgebraicGeometry): Tate normal form of elliptic curves --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebraic-geometry awaiting-zulip new-contributor 291/26 Mathlib.lean,Mathlib/AlgebraicGeometry/EllipticCurve/IsomOfJ.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Modular/TateNormalForm.lean,Mathlib/AlgebraicGeometry/EllipticCurve/NormalForms.lean,Mathlib/AlgebraicGeometry/EllipticCurve/VariableChange.lean 5 31 ['MichaelStollBayreuth', 'Multramate', 'acmepjz', 'github-actions', 'grunweg', 'kckennylau', 'leanprover-community-bot-assistant'] nobody
285-85272
9 months ago
318-60389
318 days ago
6-44784
6 days
25247 alreadydone
author:alreadydone
 Projective contraction --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 160/31 Mathlib/Data/Finsupp/Defs.lean,Mathlib/LinearAlgebra/Contraction.lean,Mathlib/LinearAlgebra/Pi.lean,Mathlib/RingTheory/Finiteness/Finsupp.lean 4 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
285-85269
9 months ago
324-22623
324 days ago
0-30
30 seconds
25561 callesonne
author:callesonne
 feat(Category/Grpd): define the bicategory of groupoids --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory 179/25 Mathlib.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/InducedMaps.lean,Mathlib/CategoryTheory/Bicategory/Functor/Pseudofunctor.lean,Mathlib/CategoryTheory/Bicategory/Functor/Strict.lean,Mathlib/CategoryTheory/Category/Cat.lean,Mathlib/CategoryTheory/Category/Grpd.lean 6 6 ['callesonne', 'github-actions', 'joelriou', 'leanprover-community-bot-assistant', 'robin-carlier'] nobody
285-85257
9 months ago
302-36580
302 days ago
10-56011
10 days
25671 eric-wieser
author:eric-wieser
 refactor: generalize `OreSet` to work for bimodules --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict large-import 243/256 Mathlib/Algebra/Module/LocalizedModule/Basic.lean,Mathlib/AlgebraicGeometry/Modules/Tilde.lean,Mathlib/GroupTheory/OreLocalization/Basic.lean,Mathlib/GroupTheory/OreLocalization/OreSet.lean,Mathlib/RingTheory/OreLocalization/Ring.lean,Mathlib/RingTheory/TensorProduct/Nontrivial.lean 6 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
285-85128
9 months ago
unknown
0-0
0 seconds
25988 Multramate
author:Multramate
 refactor(AlgebraicGeometry/EllipticCurve/*): replace Fin 3 with products This PR continues the work from #24593. Original PR: https://github.com/leanprover-community/mathlib4/pull/24593 merge-conflict t-algebraic-geometry 1000/1022 Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian/Formula.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian/Point.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Projective/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Projective/Formula.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Projective/Point.lean 6 3 ['Multramate', 'github-actions', 'leanprover-community-bot-assistant'] nobody
285-84963
9 months ago
285-84963
285 days ago
18-21880
18 days
26002 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Monoidal/Action): action of `Type` on categories with coproducts We show that if a category admits coproducts of size `w`, then `Type w` acts on the left on that category. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-category-theory 213/0 Mathlib.lean,Mathlib/CategoryTheory/Monoidal/Action/ChosenTypeCopowers.lean 2 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
285-84961
9 months ago
unknown
0-0
0 seconds
26090 grunweg
author:grunweg
 chore: make `finiteness` a default tactic Opening for discussion. This PR continues the work from #25119. merge-conflict 423/366 Archive/Wiedijk100Theorems/BallotProblem.lean,Mathlib/Analysis/Analytic/Uniqueness.lean,Mathlib/Analysis/Asymptotics/ExpGrowth.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Convex/Integral.lean,Mathlib/Analysis/Fourier/AddCircle.lean,Mathlib/Analysis/Fourier/AddCircleMulti.lean,Mathlib/Analysis/FunctionalSpaces/SobolevInequality.lean,Mathlib/Analysis/Normed/Field/Basic.lean,Mathlib/Analysis/Normed/Lp/PiLp.lean,Mathlib/Analysis/Normed/Lp/ProdLp.lean,Mathlib/Analysis/Normed/Lp/lpSpace.lean,Mathlib/Analysis/SpecialFunctions/Pow/Continuity.lean,Mathlib/Analysis/SpecialFunctions/Pow/NNReal.lean,Mathlib/Analysis/SpecificLimits/Basic.lean,Mathlib/Data/ENNReal/Basic.lean,Mathlib/Data/ENNReal/Holder.lean,Mathlib/Data/ENNReal/Inv.lean,Mathlib/Data/ENNReal/Operations.lean,Mathlib/Data/ENNReal/Real.lean,Mathlib/Data/EReal/Basic.lean,Mathlib/Data/EReal/Operations.lean,Mathlib/InformationTheory/KullbackLeibler/Basic.lean,Mathlib/MeasureTheory/Covering/Besicovitch.lean,Mathlib/MeasureTheory/Function/AEEqOfIntegral.lean,Mathlib/MeasureTheory/Function/ContinuousMapDense.lean,Mathlib/MeasureTheory/Function/ConvergenceInMeasure.lean,Mathlib/MeasureTheory/Function/Egorov.lean,Mathlib/MeasureTheory/Function/Jacobian.lean,Mathlib/MeasureTheory/Function/L1Space/AEEqFun.lean,Mathlib/MeasureTheory/Function/L2Space.lean,Mathlib/MeasureTheory/Function/LocallyIntegrable.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Function/LpSeminorm/ChebyshevMarkov.lean,Mathlib/MeasureTheory/Function/LpSeminorm/CompareExp.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Defs.lean,Mathlib/MeasureTheory/Function/LpSpace/Basic.lean,Mathlib/MeasureTheory/Function/LpSpace/Complete.lean,Mathlib/MeasureTheory/Function/LpSpace/Indicator.lean,Mathlib/MeasureTheory/Function/SimpleFuncDenseLp.lean,Mathlib/MeasureTheory/Function/UniformIntegrable.lean,Mathlib/MeasureTheory/Integral/Bochner/Basic.lean,Mathlib/MeasureTheory/Integral/MeanInequalities.lean,Mathlib/MeasureTheory/Integral/Prod.lean,Mathlib/MeasureTheory/Integral/RieszMarkovKakutani/Real.lean,Mathlib/MeasureTheory/Measure/Decomposition/IntegralRNDeriv.lean,Mathlib/MeasureTheory/Measure/Decomposition/Lebesgue.lean,Mathlib/MeasureTheory/Measure/Haar/Basic.lean,Mathlib/MeasureTheory/Measure/Haar/DistribChar.lean,Mathlib/MeasureTheory/Measure/Haar/Quotient.lean,Mathlib/MeasureTheory/Measure/Haar/Unique.lean,Mathlib/MeasureTheory/Measure/Lebesgue/EqHaar.lean,Mathlib/MeasureTheory/Measure/LevyProkhorovMetric.lean,Mathlib/MeasureTheory/Measure/Real.lean,Mathlib/MeasureTheory/Measure/Restrict.lean,Mathlib/MeasureTheory/Measure/Tilted.lean,Mathlib/MeasureTheory/Measure/Typeclasses/Finite.lean,Mathlib/NumberTheory/NumberField/Discriminant/Basic.lean,Mathlib/Probability/BorelCantelli.lean,Mathlib/Probability/Independence/Conditional.lean,Mathlib/Probability/Integration.lean,Mathlib/Probability/Kernel/Composition/IntegralCompProd.lean,Mathlib/Probability/Kernel/Disintegration/CondCDF.lean,Mathlib/Probability/Kernel/Disintegration/Density.lean,Mathlib/Probability/Martingale/Convergence.lean,Mathlib/Probability/Martingale/OptionalStopping.lean,Mathlib/Probability/Moments/CovarianceBilin.lean,Mathlib/Probability/Moments/Tilted.lean,Mathlib/Probability/Moments/Variance.lean,Mathlib/Probability/UniformOn.lean,Mathlib/Topology/MetricSpace/Bounded.lean,Mathlib/Topology/MetricSpace/Perfect.lean,scripts/noshake.json 73 3 ['github-actions', 'grunweg', 'leanprover-community-bot-assistant'] nobody
285-82973
9 months ago
302-52281
302 days ago
0-1118
18 minutes
26465 joelriou
author:joelriou
 feat(Algebra/Module): presentation of the `PiTensorProduct` Given a presentation of a finite number of `R`-modules `M i`, we obtain a presentation of the module `⨂[R] i, M i`. --- - [ ] depends on: #26464 This PR continues the work from #18527. Original PR: https://github.com/leanprover-community/mathlib4/pull/18527 merge-conflict file-removed t-algebra blocked-by-other-PR
label:t-algebra$
 525/4 Mathlib.lean,Mathlib/Algebra/Module/Presentation/PiTensor.lean,Mathlib/Analysis/NormedSpace/PiTensorProduct/ProjectiveSeminorm.lean,Mathlib/Data/Set/ComplSingletonLift.lean,Mathlib/LinearAlgebra/PiTensorProduct/Basic.lean,Mathlib/LinearAlgebra/PiTensorProduct/Finite.lean,Mathlib/LinearAlgebra/PiTensorProduct/Generators.lean,Mathlib/LinearAlgebra/TensorPower/Basic.lean,Mathlib/RingTheory/PiTensorProduct.lean,Mathlib/SetTheory/Cardinal/Finite.lean 10 4 ['github-actions', 'joelriou', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
285-82694
9 months ago
293-69500
293 days ago
0-2032
33 minutes
26467 joelriou
author:joelriou
 feat(LinearAlgebra): the tensor product of a finite family of free modules is free --- - [ ] depends on: #26464 - [ ] depends on: #26465 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra blocked-by-other-PR merge-conflict file-removed
label:t-algebra$
 607/7 Mathlib.lean,Mathlib/Algebra/Module/Presentation/Free.lean,Mathlib/Algebra/Module/Presentation/PiTensor.lean,Mathlib/Analysis/NormedSpace/PiTensorProduct/ProjectiveSeminorm.lean,Mathlib/Data/Set/ComplSingletonLift.lean,Mathlib/LinearAlgebra/PiTensorProduct/Basic.lean,Mathlib/LinearAlgebra/PiTensorProduct/Basis.lean,Mathlib/LinearAlgebra/PiTensorProduct/Finite.lean,Mathlib/LinearAlgebra/PiTensorProduct/Generators.lean,Mathlib/LinearAlgebra/TensorPower/Basic.lean,Mathlib/RingTheory/PiTensorProduct.lean,Mathlib/SetTheory/Cardinal/Finite.lean 12 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
285-82692
9 months ago
293-66120
293 days ago
0-2
2 seconds
20784 eric-wieser
author:eric-wieser
 fix: prevent `exact?` recursing forever on `n = 55` Test case thanks to @llllvvuu: ```lean import Mathlib.SetTheory.Ordinal.Basic theorem natCast_inj {m n : ℕ} : (m : Ordinal) = n ↔ m = n := sorry example (n : Nat) : n = 55 := by exact? ``` This is surely a workaround for some unreported lean bug. The bug still exists for `n = 71` or higher, so we can still track down the bug after merging this patch. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory 22/3 Mathlib/SetTheory/Ordinal/Basic.lean,MathlibTest/LibrarySearchRecDepth.lean 2 15 ['Command-Master', 'eric-wieser', 'github-actions', 'kbuzzard', 'kim-em', 'leanprover-bot', 'leanprover-community-bot-assistant', 'mattrobball'] nobody
285-53957
9 months ago
285-52864
285 days ago
32-74826
32 days
24405 mcdoll
author:mcdoll
 refactor(Topology/Algebra/Module/WeakDual): Clean up - Move `Dual` and `dualPairing` lower in the import-hierachy - deduplicate `dualPairing` - Make `WeakDual` and `WeakSpace` reducible --- New version of #11500 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology large-import 146/162 Mathlib.lean,Mathlib/Analysis/Fourier/RiemannLebesgueLemma.lean,Mathlib/Analysis/InnerProductSpace/Adjoint.lean,Mathlib/Analysis/InnerProductSpace/Dual.lean,Mathlib/Analysis/LocallyConvex/WeakSpace.lean,Mathlib/Analysis/Normed/Module/Dual.lean,Mathlib/Analysis/Normed/Module/WeakDual.lean,Mathlib/Analysis/VonNeumannAlgebra/Basic.lean,Mathlib/MeasureTheory/Function/AEEqOfIntegral.lean,Mathlib/MeasureTheory/Measure/FiniteMeasure.lean,Mathlib/Topology/Algebra/Module/Dual.lean,Mathlib/Topology/Algebra/Module/WeakDual.lean,docs/overview.yaml,docs/undergrad.yaml 14 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
284-50392
9 months ago
284-50393
284 days ago
69-52361
69 days
26647 b-mehta
author:b-mehta
 feat(Data/Sym/Sym2): lift commutative operations to sym2 While we have `Sym2.lift`, it's often useful to lift operations which are known to be commutative to the typeclass system. Indeed, the existing `Sym2.mul` witnesses this already. Thus, this PR can also be seen as generalising `Sym2.mul`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-data 48/28 Mathlib/Data/Sym/Sym2.lean,Mathlib/Data/Sym/Sym2/Finsupp.lean,Mathlib/LinearAlgebra/QuadraticForm/Basic.lean,Mathlib/LinearAlgebra/QuadraticForm/Basis.lean 4 12 ['b-mehta', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant'] nobody
284-2153
9 months ago
284-21360
284 days ago
3-72995
3 days
26878 adomani
author:adomani
 feat: declaration diff script in Lean Although, it is still text-based, the parsing of the output of `git diff` is now done in Lean. The new script already performed better than the old one in a couple of situations: * #26877 See [this comment](https://github.com/leanprover-community/mathlib4/pull/26847#issuecomment-3045308885) * #26849 See [this comment](https://github.com/leanprover-community/mathlib4/pull/26849#issuecomment-3045092965) --- This is still work in progress: the parsing should be more or less done, but I have not yet hooked this into the action workflow. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 497/0 scripts/DeclarationDiff_text_based.lean 1 4 ['adomani', 'bryangingechen', 'github-actions'] bryangingechen
assignee:bryangingechen
282-68484
9 months ago
283-32035
283 days ago
0-9
9 seconds
26067 mapehe
author:mapehe
 feat(Topology/StoneCech): exists_continuous_surjection_from_StoneCech_to_dense_range This lemma formalises the following version of the maximality property of the Stone–Čech compactification: If `f : α → β` is a continuous map from a topological space `α` to a Hausdorff space `β` with dense range, then there exists a continuous surjection from `StoneCech α` to `β` extending `f`. In particular, `StoneCech α` is the “largest” compact Hausdorff space into which `α` densely embeds, in the sense that any other such space is a continuous image of it. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology 18/0 Mathlib/Topology/StoneCech.lean 1 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
282-66341
9 months ago
282-66341
282 days ago
20-8582
20 days
25999 bjoernkjoshanssen
author:bjoernkjoshanssen
 feat(Topology/Compactification): projective line over ℝ is homeomorphic to the one-point compactification of ℝ This PR continues the work from #18306. Original PR: https://github.com/leanprover-community/mathlib4/pull/18306 merge-conflict t-topology 920/0 Mathlib.lean,Mathlib/Topology/Compactification/OnePointHomeomorph.lean,Mathlib/Topology/Compactification/OnePointRealLemmas.lean 3 3 ['bjoernkjoshanssen', 'github-actions', 'leanprover-community-bot-assistant'] nobody
280-72415
9 months ago
282-66343
282 days ago
21-20473
21 days
26994 Paul-Lez
author:Paul-Lez
 feat(Topology/MetricSpace/Pseudo/Defs): add easy lemma about opens in topological spaces Split from #26992 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-topology easy 9/0 Mathlib/Topology/MetricSpace/Pseudo/Defs.lean 1 4 ['Paul-Lez', 'github-actions', 'grunweg'] nobody
279-47141
9 months ago
279-48563
279 days ago
0-11233
3 hours
21039 eric-wieser
author:eric-wieser
 hack: override `instance` to insert `fast_instance%` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt merge-conflict t-meta 40/4 Mathlib/Algebra/Equiv/TransferInstance.lean,Mathlib/RingTheory/Ideal/Maximal.lean,Mathlib/Tactic/FastInstance.lean,Mathlib/Topology/FiberBundle/Basic.lean 4 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
279-29043
9 months ago
unknown
0-0
0 seconds
25611 erdOne
author:erdOne
 chore(RingTheory): add `Algebra (FractionRing R) (FractionRing S)` Co-authored-by: Yakov Pechersky --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 152/108 Mathlib.lean,Mathlib/Algebra/Algebra/NonZeroDivisors.lean,Mathlib/NumberTheory/RamificationInertia/Galois.lean,Mathlib/RingTheory/DedekindDomain/Different.lean,Mathlib/RingTheory/DedekindDomain/IntegralClosure.lean,Mathlib/RingTheory/Ideal/Norm/RelNorm.lean,Mathlib/RingTheory/IntegralClosure/IntegralRestrict.lean,Mathlib/RingTheory/Localization/FractionRing.lean,Mathlib/RingTheory/Localization/FractionRingAlgebra.lean,Mathlib/RingTheory/Localization/Integral.lean 10 20 ['alreadydone', 'erdOne', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant', 'pechersky'] nobody
275-55159
9 months ago
308-36514
308 days ago
3-31703
3 days
18230 digama0
author:digama0
 feat(Tactic/ScopedNS): extend `scoped[NS]` to more commands refactor `ScopedNS` to remove error prone repetitiveness and extend it to other commands such as `syntax`, `macro`, `elab`, etc. Co-authored-by: Jon Eugster --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-meta 201/26 Mathlib/Tactic/ScopedNS.lean,MathlibTest/scopedNS.lean 2 7 ['adomani', 'digama0', 'eric-wieser', 'github-actions', 'joneugster', 'kbuzzard'] nobody
273-61620
8 months ago
416-61125
416 days ago
31-68555
31 days
27330 BoltonBailey
author:BoltonBailey
 feat(Tactic/Linter): add TacticMs for natural subtraction and division This is a (pair of) short tactic scripts I wrote for Project Numina while vetting formal formal statements (thanks to [this guide](https://github.com/mirefek/lean-tactic-programming-guide) for the primer). The scripts check for the presence of natural subtraction and natural division, which can often lead to mistakes. Of course, Mathlib allows natural subtraction freely, so it's not obvious this could be made useful to Mathlib itself. Still, maybe it's of use to some other project, so I'll leave it here. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter 66/0 Mathlib/Tactic/Linter/TruncatedNat.lean 1 2 ['BoltonBailey', 'eric-wieser', 'github-actions'] nobody
269-5745
8 months ago
unknown
0-0
0 seconds
25284 alreadydone
author:alreadydone
 feat(LinearAlgebra/Contraction): bijectivity of `dualTensorHom` + generalize to CommSemiring --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 167/32 Mathlib/Data/Finsupp/Defs.lean,Mathlib/LinearAlgebra/Contraction.lean,Mathlib/LinearAlgebra/Pi.lean,Mathlib/LinearAlgebra/Trace.lean,Mathlib/RingTheory/Finiteness/Finsupp.lean 5 16 ['alreadydone', 'eric-wieser', 'github-actions', 'kckennylau', 'leanprover-bot', 'leanprover-community-bot-assistant'] nobody
268-19699
8 months ago
274-71866
274 days ago
45-38763
45 days
22749 joelriou
author:joelriou
 feat(CategoryTheory/Abelian): the Gabriel-Popescu theorem as a localization with respect to a Serre class This PR introduces a structure `GabrielPopescuPackage C` which contains the information to say that the abelian category `C` is a localization of a category of modules with respect to a suitable Serre class. --- - [x] depends on: #26033 - [ ] depends on: #26663 - [x] depends on: #22733 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-category-theory 202/6 Mathlib.lean,Mathlib/CategoryTheory/Abelian/GrothendieckCategory/ModuleEmbedding/GabrielPopescu.lean,Mathlib/CategoryTheory/Abelian/SerreClass/Bousfield.lean,Mathlib/CategoryTheory/Abelian/SerreClass/MorphismProperty.lean,Mathlib/CategoryTheory/ObjectProperty/ContainsZero.lean 5 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
267-62985
8 months ago
287-48701
287 days ago
0-10699
2 hours
26784 eric-wieser
author:eric-wieser
 chore: remove suppress_compilation Still not exhaustive. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 0/37 Mathlib/Algebra/Category/CoalgCat/ComonEquivalence.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Category/Ring/Constructions.lean,Mathlib/Algebra/Colimit/DirectLimit.lean,Mathlib/Algebra/Colimit/Module.lean,Mathlib/Algebra/Colimit/Ring.lean,Mathlib/AlgebraicGeometry/Limits.lean,Mathlib/Analysis/Normed/Algebra/Unitization.lean,Mathlib/Analysis/NormedSpace/Multilinear/Basic.lean,Mathlib/Analysis/NormedSpace/Multilinear/Curry.lean,Mathlib/Analysis/NormedSpace/OperatorNorm/Basic.lean,Mathlib/Analysis/NormedSpace/OperatorNorm/Bilinear.lean,Mathlib/Analysis/NormedSpace/OperatorNorm/Completeness.lean,Mathlib/Analysis/NormedSpace/OperatorNorm/Mul.lean,Mathlib/Analysis/NormedSpace/OperatorNorm/NNNorm.lean,Mathlib/Analysis/NormedSpace/OperatorNorm/NormedSpace.lean,Mathlib/CategoryTheory/Abelian/Projective/Resolution.lean,Mathlib/CategoryTheory/Monoidal/Internal/Module.lean 18 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
267-35246
8 months ago
unknown
0-0
0 seconds
26987 joelriou
author:joelriou
 chore: deprecating module LinearAlgebra.PiTensorProduct --- - [ ] depends on: #26464 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra blocked-by-other-PR
label:t-algebra$
 1209/934 Mathlib.lean,Mathlib/Analysis/NormedSpace/PiTensorProduct/ProjectiveSeminorm.lean,Mathlib/Data/SubtypeNeLift.lean,Mathlib/LinearAlgebra/PiTensorProduct.lean,Mathlib/LinearAlgebra/PiTensorProduct/Basic.lean,Mathlib/LinearAlgebra/PiTensorProduct/Finite.lean,Mathlib/LinearAlgebra/PiTensorProduct/Generators.lean,Mathlib/LinearAlgebra/TensorPower/Basic.lean,Mathlib/RingTheory/PiTensorProduct.lean,Mathlib/SetTheory/Cardinal/Finite.lean 10 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
266-63998
8 months ago
279-65764
279 days ago
0-2
2 seconds
27435 callesonne
author:callesonne
 feat(Normed/Algebra/Logarithm): add FormalMultilinearSeries of logarithm around `1` This PR adds the `FormalMultilinearSeries` corresponding to `log` around `1` (or rather, corresponding to `log(1 + x)`. For now, this PR just adds the definition, and copies over as many (easy) results as possible from the corresponding exponential file. In a follow up PR, we will add a criterion for when the logarithm converges on the unit disk (based on the growth of the inverse norms of naturals in the given algebra), and show that this holds for any Q_p algebra. This work has been done as part of the workshop "Formalizing Class Field Theory" in Oxford. Since much of this is copy-pasting the Exponential file, I have kept Anatole Dedecker and Eric Wieser as coauthors. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-analysis 311/0 Mathlib/Analysis/Normed/Algebra/Logarithm.lean 1 1 ['github-actions'] nobody
266-42853
8 months ago
266-43191
266 days ago
0-29
29 seconds
24668 robertmaxton42
author:robertmaxton42
 feat(LinearAlgebra): add inductive principle for the free product of algebras * Add `FreeProduct.inductionOn` and `.asPowers.inductionOn`. - [ ] depends on: #24532 --- * `simp↓` on `empty_rel'_bot`: the LHS is indeed not in simp-normal form, but `simp` can't solve the full lemma (if only because `Function.onFun` isn't marked `@[simp]`) and the actual simp-normal form of `rel'` isn't terribly useful for humans. Since I do expect users to type `rel' R A` by hand, I claim this use of `simp↓` is justified. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra blocked-by-other-PR
label:t-algebra$
 205/9 Mathlib/LinearAlgebra/FreeProduct/Basic.lean 1 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
265-7167
8 months ago
344-19272
344 days ago
0-328
5 minutes
13973 digama0
author:digama0
 feat: lake exe refactor, initial framework This is the initial framework code for `lake exe refactor`. To use it, you add your refactoring to `Refactor/Main.lean` (note, you have to actually write some metaprogramming code here for the refactoring itself), and the harness will run it on specified files and apply the generated edits. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-meta 139/0 Refactor/Main.lean,lakefile.lean 2 11 ['adomani', 'digama0', 'eric-wieser', 'github-actions', 'joneugster', 'leanprover-community-bot-assistant', 'mattrobball'] nobody
261-47158
8 months ago
610-50611
610 days ago
6-30547
6 days
12181 adomani
author:adomani
 lint also `let` vs `have` This PR is symmetrical to #12157: here we lint for non-`Type`-valued `let`s. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-linter 797/544 Archive/Imo/Imo1962Q1.lean,Archive/Wiedijk100Theorems/CubingACube.lean,Archive/Wiedijk100Theorems/FriendshipGraphs.lean,Mathlib.lean,Mathlib/Algebra/Algebra/Tower.lean,Mathlib/Algebra/BigOperators/Basic.lean,Mathlib/Algebra/DirectLimit.lean,Mathlib/Algebra/Group/UniqueProds.lean,Mathlib/Algebra/Homology/HomologicalComplexBiprod.lean,Mathlib/Algebra/Homology/HomologySequence.lean,Mathlib/Algebra/Homology/HomotopyCategory/Pretriangulated.lean,Mathlib/Algebra/Homology/Localization.lean,Mathlib/Algebra/Homology/ShortComplex/Abelian.lean,Mathlib/Algebra/Homology/ShortComplex/ConcreteCategory.lean,Mathlib/Algebra/Homology/ShortComplex/Exact.lean,Mathlib/Algebra/Homology/ShortComplex/ExactFunctor.lean,Mathlib/Algebra/Homology/ShortComplex/Homology.lean,Mathlib/Algebra/Homology/ShortComplex/LeftHomology.lean,Mathlib/Algebra/Homology/ShortComplex/Linear.lean,Mathlib/Algebra/Homology/ShortComplex/Preadditive.lean,Mathlib/Algebra/Homology/ShortComplex/PreservesHomology.lean,Mathlib/Algebra/Homology/ShortComplex/QuasiIso.lean,Mathlib/Algebra/Homology/ShortComplex/RightHomology.lean,Mathlib/Algebra/Lie/Engel.lean,Mathlib/Algebra/Lie/Killing.lean,Mathlib/Algebra/Module/PID.lean,Mathlib/Algebra/Module/Submodule/Localization.lean,Mathlib/Algebra/Module/Zlattice.lean,Mathlib/Algebra/MonoidAlgebra/Grading.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Algebra/Order/CauSeq/Basic.lean,Mathlib/Algebra/Polynomial/FieldDivision.lean,Mathlib/Algebra/Polynomial/RingDivision.lean,Mathlib/AlgebraicGeometry/Morphisms/QuasiCompact.lean,Mathlib/AlgebraicGeometry/Morphisms/QuasiSeparated.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Scheme.lean,Mathlib/AlgebraicGeometry/Pullbacks.lean,Mathlib/AlgebraicGeometry/StructureSheaf.lean,Mathlib/AlgebraicTopology/DoldKan/Homotopies.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Bounds.lean,Mathlib/Analysis/Calculus/FDeriv/Comp.lean,Mathlib/Analysis/Calculus/Rademacher.lean,Mathlib/Analysis/Complex/Tietze.lean,Mathlib/Analysis/Convex/Between.lean,Mathlib/Analysis/Convolution.lean,Mathlib/Analysis/Fourier/RiemannLebesgueLemma.lean,Mathlib/Analysis/InnerProductSpace/GramSchmidtOrtho.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Analysis/InnerProductSpace/Rayleigh.lean,Mathlib/Analysis/NormedSpace/ContinuousAffineMap.lean,Mathlib/Analysis/NormedSpace/OperatorNorm/Completeness.lean,Mathlib/Analysis/NormedSpace/Spectrum.lean,Mathlib/Analysis/SpecialFunctions/Integrals.lean,Mathlib/CategoryTheory/Abelian/Basic.lean,Mathlib/CategoryTheory/Abelian/Exact.lean,Mathlib/CategoryTheory/Abelian/Pseudoelements.lean,Mathlib/CategoryTheory/Abelian/Transfer.lean,Mathlib/CategoryTheory/Adhesive.lean,Mathlib/CategoryTheory/Closed/Cartesian.lean,Mathlib/CategoryTheory/Closed/Monoidal.lean,Mathlib/CategoryTheory/Comma/Arrow.lean,Mathlib/CategoryTheory/EffectiveEpi/Extensive.lean,Mathlib/CategoryTheory/Extensive.lean,Mathlib/CategoryTheory/Functor/EpiMono.lean,Mathlib/CategoryTheory/Functor/KanExtension/Basic.lean,Mathlib/CategoryTheory/Galois/Basic.lean,Mathlib/CategoryTheory/Galois/Decomposition.lean,Mathlib/CategoryTheory/Galois/Examples.lean,Mathlib/CategoryTheory/GradedObject/Trifunctor.lean,Mathlib/CategoryTheory/IsConnected.lean,Mathlib/CategoryTheory/Limits/ConcreteCategory.lean,Mathlib/CategoryTheory/Limits/Constructions/EpiMono.lean,Mathlib/CategoryTheory/Limits/Constructions/WeaklyInitial.lean,Mathlib/CategoryTheory/Limits/FilteredColimitCommutesFiniteLimit.lean,Mathlib/CategoryTheory/Limits/Final.lean,Mathlib/CategoryTheory/Limits/FintypeCat.lean,Mathlib/CategoryTheory/Limits/Fubini.lean,Mathlib/CategoryTheory/Limits/IsLimit.lean,Mathlib/CategoryTheory/Limits/Preserves/Basic.lean,Mathlib/CategoryTheory/Limits/Shapes/FiniteLimits.lean,Mathlib/CategoryTheory/Limits/VanKampen.lean,Mathlib/CategoryTheory/Localization/LocalizerMorphism.lean,Mathlib/CategoryTheory/Localization/Pi.lean,Mathlib/CategoryTheory/Localization/Resolution.lean,Mathlib/CategoryTheory/Monad/Monadicity.lean,Mathlib/CategoryTheory/PUnit.lean,Mathlib/CategoryTheory/Sites/Coherent/CoherentSheaves.lean,Mathlib/CategoryTheory/Sites/Coherent/RegularSheaves.lean,Mathlib/CategoryTheory/Sites/Coverage.lean,Mathlib/CategoryTheory/Sites/LeftExact.lean,Mathlib/CategoryTheory/Sites/Preserves.lean,Mathlib/CategoryTheory/Sites/Pullback.lean,Mathlib/CategoryTheory/Sites/Sheaf.lean,Mathlib/CategoryTheory/Triangulated/Pretriangulated.lean,Mathlib/Combinatorics/Colex.lean,Mathlib/Combinatorics/SetFamily/Kleitman.lean,Mathlib/Combinatorics/SimpleGraph/Clique.lean,Mathlib/Combinatorics/SimpleGraph/Coloring.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity.lean 271 0 [] nobody
259-57474
8 months ago
730-66408
730 days ago
0-8
8 seconds
10190 jstoobysmith
author:jstoobysmith
 feat(AlgebraicTopology): add Augmented Simplex Category - Added the definition of the category FinLinOrd of finite linear ordered sets. - Added the definition of the augmented simplex category `AugmentedSimplexCategory`, and showed it is the Skeleton of FinLinOrd. - Showed that the category of augmented simplicial objects defined as a comma category is equivalent to the category of functors from `AugmentedSimplexCategory^\op` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology WIP t-category-theory new-contributor merge-conflict 720/0 Mathlib.lean,Mathlib/AlgebraicTopology/AugmentedSimplexCategory.lean,Mathlib/AlgebraicTopology/SimplicialObject.lean,Mathlib/Order/Category/FinLinOrd.lean 4 5 ['TwoFX', 'YaelDillies', 'joelriou', 'jstoobysmith'] nobody
259-57412
8 months ago
796-50338
796 days ago
7-63253
7 days
10084 alreadydone
author:alreadydone
 draft for Van Kampen The part about the homotopy lifting property for covering maps has been extracted to #22649 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebraic-topology 91/24 Mathlib/AlgebraicTopology/FundamentalGroupoid/Basic.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/VanKampen.lean 2 1 ['leanprover-community-bot-assistant'] nobody
259-57321
8 months ago
unknown
0-0
0 seconds
25914 eric-wieser
author:eric-wieser
 feat: add an ext lemma for the opposite category This powers up `aesop_cat`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory awaiting-CI 18/56 Mathlib/AlgebraicTopology/SimplicialObject/Basic.lean,Mathlib/CategoryTheory/Abelian/Opposite.lean,Mathlib/CategoryTheory/Category/RelCat.lean,Mathlib/CategoryTheory/GuitartExact/Opposite.lean,Mathlib/CategoryTheory/Limits/Opposites.lean,Mathlib/CategoryTheory/Limits/Shapes/Products.lean,Mathlib/CategoryTheory/Opposites.lean,Mathlib/CategoryTheory/Triangulated/Opposite/Functor.lean,Mathlib/Combinatorics/Quiver/Basic.lean 9 7 ['eric-wieser', 'github-actions', 'grunweg', 'leanprover-community-bot-assistant', 'robin-carlier'] nobody
259-55055
8 months ago
305-40146
305 days ago
0-1208
20 minutes
20208 js2357
author:js2357
 feat: Define the localization of a fractional ideal at a prime ideal Define the localization of a fractional ideal at a prime ideal, and prove some basic properties. --- Alternate version of #14237 generalized to use `IsLocalization` and `IsFractionRing` rather than `Localization.AtPrime` and `FractionRing` [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra
label:t-algebra$
 248/0 Mathlib.lean,Mathlib/RingTheory/FractionalIdeal/LocalizedAtPrime.lean 2 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
259-40298
8 months ago
479-21399
479 days ago
0-21
21 seconds
24260 plp127
author:plp127
 feat(Topology): add API for Hereditarily Lindelof spaces Copies the stuff about Lindelof spaces to Hereditarily Lindelof spaces. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-topology 222/42 Mathlib/Topology/Compactness/Lindelof.lean 1 15 ['github-actions', 'grunweg', 'mathlib4-merge-conflict-bot', 'urkud'] urkud
assignee:urkud
259-9870
8 months ago
330-56910
330 days ago
29-42365
29 days
27181 ADedecker
author:ADedecker
 chore: more conceptual definition of `ValuativeRel.ValueGroupWithZero` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra large-import
label:t-algebra$
 685/467 Mathlib.lean,Mathlib/Data/Quot.lean,Mathlib/Data/Setoid/Basic.lean,Mathlib/GroupTheory/Congruence/Defs.lean,Mathlib/GroupTheory/Congruence/GroupWithZero.lean,Mathlib/RingTheory/OreLocalization/Basic.lean,Mathlib/RingTheory/OreLocalization/NonZeroDivisors.lean,Mathlib/RingTheory/OreLocalization/Ring.lean,Mathlib/RingTheory/Valuation/ValuativeRel.lean 9 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] nobody
259-9859
8 months ago
unknown
0-0
0 seconds
27813 javra
author:javra
 feat: IMO 2025 Q1 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) IMO WIP 882/0 Archive/Imo/Imo2025Q1.lean 1 1 ['github-actions'] nobody
258-58280
8 months ago
258-59478
258 days ago
0-14
14 seconds
27608 RemyDegenne
author:RemyDegenne
 feat(MeasureTheory): typeclasses for measures with finite moments WIP because it seems useful for #26291 but I want to investigate more. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-measure-probability 97/17 Mathlib.lean,Mathlib/MeasureTheory/Measure/Typeclasses/FiniteMoments.lean,Mathlib/Probability/Moments/CovarianceBilin.lean 3 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
258-44735
8 months ago
262-28599
262 days ago
0-1
1 second
20008 FLDutchmann
author:FLDutchmann
 feat(NumberTheory): Selberg sieve This PR is a working draft of the full proof of the fundamental theorem of the Selberg sieve. I will create dependent PRs as I clean up the code. This work was used in the first proof of the prime number theorem in PNT+. --- - [x] depends on: #20025 - [x] depends on: #20026 - [x] depends on: #20779 - [x] depends on: #21880 - [ ] depends on: #27702 - [ ] depends on: #27707 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory blocked-by-other-PR merge-conflict awaiting-author t-analysis 937/0 Mathlib/NumberTheory/SelbergSieve/Basic.lean,Mathlib/NumberTheory/SelbergSieve/Selberg.lean,docs/references.bib 3 3 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
258-42580
8 months ago
unknown
0-0
0 seconds
26383 eric-wieser
author:eric-wieser
 feat: `Real.sin_eq_one_iff` and similar --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-analysis 155/101 Mathlib/Algebra/ModEq.lean,Mathlib/Analysis/SpecialFunctions/Complex/Log.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Angle.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Basic.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Complex.lean 5 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
255-63963
8 months ago
unknown
0-0
0 seconds
25991 Multramate
author:Multramate
 feat(AlgebraicGeometry/EllipticCurve): generalise nonsingular condition This PR continues the work from #25219. Original PR: https://github.com/leanprover-community/mathlib4/pull/25219 merge-conflict t-algebraic-geometry 2127/1561 Mathlib/Algebra/Group/Units/Basic.lean,Mathlib/Algebra/Group/Units/Hom.lean,Mathlib/Algebra/Module/PID.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine/Formula.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine/Point.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian/Formula.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian/Point.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Projective/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Projective/Formula.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Projective/Point.lean,Mathlib/RingTheory/DedekindDomain/AdicValuation.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/Ideal/Span.lean 15 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
255-63845
8 months ago
285-84962
285 days ago
18-21743
18 days
25986 Multramate
author:Multramate
 feat(AlgebraicGeometry/EllipticCurve/NumberField/Height): define heights on Weierstrass curves This PR continues the work from #15786. Original PR: https://github.com/leanprover-community/mathlib4/pull/15786 t-algebraic-geometry 650/0 Mathlib/AlgebraicGeometry/EllipticCurve/NumberField/Height.lean 1 2 ['Multramate', 'github-actions'] nobody
255-63838
8 months ago
unknown
0-0
0 seconds
25985 Multramate
author:Multramate
 feat(AlgebraicGeometry/EllipticCurve/Jacobian): add equivalences between points and explicit WithZero types This PR continues the work from #14923. Original PR: https://github.com/leanprover-community/mathlib4/pull/14923 merge-conflict t-algebraic-geometry 262/66 Mathlib/AlgebraicGeometry/EllipticCurve/Affine.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Group.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian.lean,scripts/style-exceptions.txt 4 1 ['Multramate'] nobody
255-63833
8 months ago
304-20651
304 days ago
0-48
48 seconds
25982 Multramate
author:Multramate
 feat(AlgebraicGeometry/EllipticCurve/Group): compute range of baseChange This PR continues the work from #10142. Original PR: https://github.com/leanprover-community/mathlib4/pull/10142 merge-conflict t-algebraic-geometry 421/212 Mathlib/AlgebraicGeometry/EllipticCurve/Affine.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Group.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Weierstrass.lean,Mathlib/GroupTheory/GroupAction/Basic.lean,Mathlib/GroupTheory/Subgroup/Basic.lean,Mathlib/GroupTheory/Submonoid/Operations.lean 6 1 ['Multramate'] nobody
255-63819
8 months ago
304-20818
304 days ago
0-51
51 seconds
25427 Paul-Lez
author:Paul-Lez
 feat(Analysis/Calculus/PartialDerivatives): Propose notation for partial derivatives. This PR introduces a notation for partial derivatives, taken with respect to a canonical basis. The idea here is that this might be useful for e.g. writing down PDEs. The notation allows use to write things like ```lean -- The canonical basis for `ℝ × ℝ` is indexed by `Fin 0` so `∂₀[ℝ]` corresponds to taking -- the first partial derivative example : (∂₀[ℝ] fun (x : ℝ × ℝ) => x.1) 0 = 1 := by simp [Pi.zero_def, lineDeriv] ``` This has already been discussed on Zulip [here](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Partial.20derivatives). I've opened this PR as a draft in order to get preliminary feedback on the contents (e.g. is this appropriate for Mathlib?); the file contains some demos of the notation in action. Co-authored-by: Eric Wieser --- - [ ] depends on: #25425 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-analysis 195/0 Mathlib.lean,Mathlib/Analysis/Calculus/PartialDerivatives/Notation.lean,Mathlib/LinearAlgebra/Basis/HasCanonicalBasis.lean 3 16 ['Paul-Lez', 'github-actions', 'leanprover-community-bot-assistant', 'lecopivo', 'mathlib4-dependent-issues-bot', 'ocfnash'] nobody
255-63618
8 months ago
unknown
0-0
0 seconds
25425 Paul-Lez
author:Paul-Lez
 feat(LinearAlgebra/Basis/HasCanonicalBasis): propose `HasCanonicalBasis` class Context: in some cases, e.g. writing down PDEs, having a notion of partial derivatives can be useful. In an ideal world (as mentioned by @ocfnash in [this Zulip thread](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Partial.20derivatives/with/463936246)), one could write something along the lines of `open scoped PartialDerivatives` in order to access nice notation for this. This PR introduces a notion of a canonical basis for a module in order to allow taking partial derivatives with respect to it. A later PR (which I am about open) would then propose a notation for taking partial derivatives (defined using `lineDeriv` in order to avoid requiring Frechet-differentiability assumptions). The goal here is to have notation that works equally well on e.g. `𝕜 × 𝕜` and `EuclideanSpace 𝕜 (Fin 2)` and so on. I've opened this PR as a draft in order to get some initial feedback on the content (and whether this is considered appropriate for Mathlib!); the file itself would need to be split (e.g. the instances defined should probably go in different files) Co-authored-by: Eric Wieser --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 105/0 Mathlib.lean,Mathlib/LinearAlgebra/Basis/HasCanonicalBasis.lean 2 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
255-63613
8 months ago
unknown
0-0
0 seconds
25362 adomani
author:adomani
 feat: a linter for duplicated `open` This linter warns when a namespace is repeated. It makes an effort to report only the problematic namespaces, but is not especially robust. The linter has some awareness of the `namespace` command, so ```lean def X.Y := 0 open X namespace X open Y ``` will flag both `namespace X` and `open Y` as problematic, even though it was the `open `X` that became redundant with `namespace X`. However, I will not have much time to devote to polishing this and there are quite a few exception in Mathlib before a better version could be seriously considered for adoption. [#mathlib4 > linter requests @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/linter.20requests/near/520273644) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt merge-conflict t-linter large-import 191/94 Mathlib.lean,Mathlib/Algebra/Group/Pi/Basic.lean,Mathlib/Algebra/GroupWithZero/Pi.lean,Mathlib/Algebra/Order/Ring/InjSurj.lean,Mathlib/CategoryTheory/Functor/ReflectsIso/Basic.lean,Mathlib/Data/Fin/Basic.lean,Mathlib/Data/Finite/Defs.lean,Mathlib/Data/Ineq.lean,Mathlib/Data/List/Lemmas.lean,Mathlib/Data/List/NatAntidiagonal.lean,Mathlib/Data/Nat/Choose/Basic.lean,Mathlib/Data/Nat/Prime/Basic.lean,Mathlib/Data/Nat/Prime/Defs.lean,Mathlib/Data/Set/Image.lean,Mathlib/Data/Set/Insert.lean,Mathlib/Init.lean,Mathlib/Logic/Basic.lean,Mathlib/Logic/Embedding/Set.lean,Mathlib/Logic/Pairwise.lean,Mathlib/Order/BoundedOrder/Basic.lean,Mathlib/Order/WithBot.lean,Mathlib/RingTheory/OreLocalization/Basic.lean,Mathlib/Tactic.lean,Mathlib/Tactic/ApplyFun.lean,Mathlib/Tactic/Bound.lean,Mathlib/Tactic/CongrM.lean,Mathlib/Tactic/Find.lean,Mathlib/Tactic/Lift.lean,Mathlib/Tactic/Linarith/Oracle/FourierMotzkin.lean,Mathlib/Tactic/Linter.lean,Mathlib/Tactic/Linter/DupOpen.lean,Mathlib/Tactic/NormNum/PowMod.lean,Mathlib/Tactic/Recover.lean,Mathlib/Tactic/ReduceModChar.lean,Mathlib/Tactic/Widget/Calc.lean,Mathlib/Tactic/Widget/SelectInsertParamsClass.lean,Mathlib/Tactic/Widget/StringDiagram.lean,Mathlib/Topology/CWComplex/Abstract/Basic.lean,Mathlib/Topology/ContinuousMap/Interval.lean,Mathlib/Topology/Germ.lean,Mathlib/Topology/Homotopy/HSpaces.lean,Mathlib/Topology/Order/LowerUpperTopology.lean,Mathlib/Topology/Order/PartialSups.lean,Mathlib/Topology/Separation/DisjointCover.lean,Mathlib/Topology/Sheaves/Sheafify.lean,Mathlib/Util/CountHeartbeats.lean,MathlibTest/DupOpen.lean 47 14 ['adomani', 'github-actions', 'grunweg', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] nobody
255-63608
8 months ago
318-57390
318 days ago
0-23
23 seconds
25238 Hagb
author:Hagb
 feat(Tactic/ComputeDegree): add support for scalar multiplication with different types It would be able to deal with `a • (X : R[X])` where `a : S` is in a different type `S` with `[SMulZeroClass S R]`. --- - [x] depends on: #25237 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta new-contributor 17/5 Mathlib/Tactic/ComputeDegree.lean,MathlibTest/ComputeDegree.lean 2 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
255-63603
8 months ago
285-85272
285 days ago
38-26044
38 days
17145 Command-Master
author:Command-Master
 feat(Archive/Ioi/Ioi2024Q2): a proof of the solution of question 2 from IOI 2024. --- - [x] depends on: #17189 - [x] depends on: #17190 - [x] depends on: #17191 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP IMO large-import 1013/1 Archive.lean,Archive/Ioi/Ioi2024Q2.lean,Mathlib.lean,Mathlib/Combinatorics/Orbits.lean,Mathlib/Data/List/SplitLengths.lean,Mathlib/Data/List/Transpose.lean,Mathlib/Data/List/Zip.lean,Mathlib/Data/Vector/Basic.lean,Mathlib/Data/Vector/Defs.lean,Mathlib/Data/Vector/MapLemmas.lean,Mathlib/Data/Vector/Transpose.lean,Mathlib/GroupTheory/Perm/Cycle/Basic.lean,Mathlib/Logic/Function/Iterate.lean,Mathlib/Order/Antisymmetrization.lean,Mathlib/Order/Partition/Finpartition.lean 15 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
255-63563
8 months ago
unknown
0-0
0 seconds
27643 ADedecker
author:ADedecker
 Ad bdd unif conv --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 111/26 Mathlib/Analysis/LocallyConvex/Bounded.lean,Mathlib/Topology/Algebra/Module/StrongTopology.lean,Mathlib/Topology/Algebra/Module/UniformConvergence.lean,Mathlib/Topology/Bornology/Absorbs.lean 4 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
255-42322
8 months ago
unknown
0-0
0 seconds
26385 jjdishere
author:jjdishere
 feat(RingTheory/Perfectoid): define integral perfectoid rings This PR continues the work from #22331. Original PR: https://github.com/leanprover-community/mathlib4/pull/22331 merge-conflict WIP t-ring-theory 1081/15 Mathlib.lean,Mathlib/Algebra/Ring/Aut.lean,Mathlib/FieldTheory/Perfect.lean,Mathlib/RingTheory/AdicCompletion/Basic.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/Ideal/Quotient/Defs.lean,Mathlib/RingTheory/Ideal/Quotient/PowTransition.lean,Mathlib/RingTheory/Perfection.lean,Mathlib/RingTheory/Perfectoid/BDeRham.lean,Mathlib/RingTheory/Perfectoid/FontaineTheta.lean,Mathlib/RingTheory/Perfectoid/IntergalPerfectoid.lean,Mathlib/RingTheory/Perfectoid/Untilt.lean,Mathlib/RingTheory/WittVector/Basic.lean,Mathlib/RingTheory/WittVector/Complete.lean,Mathlib/RingTheory/WittVector/TeichmullerSeries.lean,docs/references.bib 16 3 ['github-actions', 'jjdishere', 'leanprover-community-bot-assistant'] nobody
254-66030
8 months ago
296-4053
296 days ago
0-79
1 minute
22909 AntoineChambert-Loir
author:AntoineChambert-Loir
 feat(RingTheory/Pure): pure submodules A submodule `N` of an `R`-module is *pure* if all maps `S ⊗[R] N → S ⊗[R] M` deduced by base change from the injection of `N` into `M` are injective, for all `R`-algebras `S`. This is expressed by the class `Submodule.IsPure`. For type theoretic reason, the definition of `Submodule.IsPure` only considers algebras `S` in the same universe as `R`, but `Submodule.IsPure.baseChange_injective` establishes the property for all universes. * `Submodule.IsComplemented.isPure` : a complemented submodule is pure. Co-authored with @mariainesdff --- - [ ] depends on: #22898 - [ ] depends on: #22908 - [x] depends on: #22911 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-ring-theory blocked-by-other-PR 592/3 Mathlib.lean,Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/RingTheory/Adjoin/FG.lean,Mathlib/RingTheory/Finiteness/Basic.lean,Mathlib/RingTheory/Finiteness/Cardinality.lean,Mathlib/RingTheory/Finiteness/Small.lean,Mathlib/RingTheory/Pure.lean,Mathlib/RingTheory/Spectrum/Prime/RingHom.lean,Mathlib/RingTheory/TensorProduct/Basic.lean,Mathlib/RingTheory/TensorProduct/DirectLimit/FG.lean,Mathlib/RingTheory/TensorProduct/DirectLimit/Small.lean 11 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
254-65745
8 months ago
399-16551
399 days ago
0-1047
17 minutes
22908 AntoineChambert-Loir
author:AntoineChambert-Loir
 feat(RingTheory/Finiteness/Small): tensor product of the system of small submodules The directed limit of a tensor product for the directed system of small submodules. Co-authored with @mariainesdff --- - [ ] depends on: #22898 - [x] depends on: #22911 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-ring-theory blocked-by-other-PR 624/2 Mathlib.lean,Mathlib/RingTheory/Adjoin/FG.lean,Mathlib/RingTheory/Finiteness/Basic.lean,Mathlib/RingTheory/Finiteness/Cardinality.lean,Mathlib/RingTheory/Finiteness/Small.lean,Mathlib/RingTheory/Spectrum/Prime/RingHom.lean,Mathlib/RingTheory/TensorProduct/Basic.lean,Mathlib/RingTheory/TensorProduct/DirectLimit/FG.lean,Mathlib/RingTheory/TensorProduct/DirectLimit/Small.lean 9 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
254-65697
8 months ago
399-16550
399 days ago
0-3552
59 minutes
22898 AntoineChambert-Loir
author:AntoineChambert-Loir
 feat(RingTheory/TensorProduct/DirectLimit/FG): direct limit of finitely generated submodules and tensor product --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-ring-theory 399/0 Mathlib.lean,Mathlib/RingTheory/Adjoin/FG.lean,Mathlib/RingTheory/Finiteness/Basic.lean,Mathlib/RingTheory/TensorProduct/Basic.lean,Mathlib/RingTheory/TensorProduct/DirectLimit/FG.lean 5 9 ['AntoineChambert-Loir', 'alreadydone', 'github-actions', 'leanprover-community-bot-assistant'] nobody
254-65690
8 months ago
389-11583
389 days ago
10-44563
10 days
20431 erdOne
author:erdOne
 feat(RingTheory/AdicCompletion): monotonicity of adic-completeness --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-ring-theory 206/16 Mathlib.lean,Mathlib/Algebra/Module/Submodule/Defs.lean,Mathlib/Algebra/Module/Submodule/Pointwise.lean,Mathlib/RingTheory/AdicCompletion/Algebra.lean,Mathlib/RingTheory/AdicCompletion/Basic.lean,Mathlib/RingTheory/AdicCompletion/Mono.lean,Mathlib/RingTheory/Finiteness/Ideal.lean 7 13 ['chrisflav', 'erdOne', 'github-actions'] nobody
254-65646
8 months ago
430-64680
430 days ago
32-79324
32 days
19596 Command-Master
author:Command-Master
 feat(RingTheory/Valuation/PrimeMultiplicity): define `WithTop ℤ`-valued prime multiplicity on a fraction field Moves: - `multiplicity_addValuation` -> `AddValuation.multiplicity` - `multiplicity_addValuation_apply` -> `AddValuation.multiplicity_apply` --- - [x] depends on: #19149 - [x] depends on: #18786 - [x] depends on: #19122 - [x] depends on: #18954 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-ring-theory large-import 101/37 Mathlib/Data/ENat/Basic.lean,Mathlib/RingTheory/DiscreteValuationRing/Basic.lean,Mathlib/RingTheory/Valuation/PrimeMultiplicity.lean 3 11 ['ChrisHughes24', 'Command-Master', 'Vierkantor', 'faenuccio', 'github-actions', 'mathlib4-dependent-issues-bot'] nobody
254-65631
8 months ago
459-41565
459 days ago
8-2214
8 days
18646 jxjwan
author:jxjwan
 feat(RingTheory): isotypic components --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-ring-theory new-contributor 308/0 Mathlib/Order/CompactlyGenerated/Basic.lean,Mathlib/RingTheory/Isotypic.lean,Mathlib/RingTheory/SimpleModule.lean 3 1 ['github-actions'] nobody
254-65624
8 months ago
527-74193
527 days ago
0-1609
26 minutes
17246 pechersky
author:pechersky
 feat(RingTheory/PrimaryDecomposition): PIR of Noetherian under jacobson condition --- - [x] depends on: #17634 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-ring-theory 653/1 Mathlib.lean,Mathlib/NumberTheory/KummerDedekind.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/Jacobson/Ideal.lean,Mathlib/RingTheory/PrimaryDecomposition.lean,docs/references.bib 8 8 ['erdOne', 'github-actions', 'mathlib4-dependent-issues-bot'] erdOne
assignee:erdOne
254-65618
8 months ago
516-1111
516 days ago
13-6188
13 days
21474 erdOne
author:erdOne
 feat(RingTheory): replace `Ring.DimensionLEOne` with `Ring.KrullDimLE` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-ring-theory large-import 285/170 Mathlib.lean,Mathlib/RingTheory/DedekindDomain/Basic.lean,Mathlib/RingTheory/DedekindDomain/Dvr.lean,Mathlib/RingTheory/DedekindDomain/Ideal.lean,Mathlib/RingTheory/DiscreteValuationRing/TFAE.lean,Mathlib/RingTheory/Ideal/Over.lean,Mathlib/RingTheory/KrullDimension/Basic.lean,Mathlib/RingTheory/KrullDimension/Localization.lean,Mathlib/RingTheory/KrullDimension/Polynomial.lean,Mathlib/RingTheory/KrullDimension/Quotient.lean,Mathlib/RingTheory/LocalRing/ResidueField/Basic.lean,Mathlib/RingTheory/Nilpotent/End.lean,Mathlib/RingTheory/Nilpotent/Lemmas.lean,Mathlib/RingTheory/PID/Quotient.lean,Mathlib/RingTheory/PrincipalIdealDomain.lean,Mathlib/RingTheory/Spectrum/Maximal/Localization.lean 16 1 ['github-actions'] nobody
254-65562
8 months ago
434-50122
434 days ago
0-19114
5 hours
8195 newell
author:newell
 feat: add a group presentation of the `DihedralGroup n` Add group presentation $\< a, b\ |\ a ^ 2 = 1, b ^ 2 = 1, (a * b) ^ n = 1 \>$ for `DihedralGroup n`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-group-theory 206/2 Mathlib/GroupTheory/PresentedGroup.lean,Mathlib/GroupTheory/SpecificGroups/Dihedral.lean 2 6 ['kbuzzard', 'newell'] nobody
254-65361
8 months ago
unknown
0-0
0 seconds
11212 shuxuezhuyi
author:shuxuezhuyi
 feat(GroupTheory/GroupAction): instance `MulAction (β ⧸ H) α` We instance this naturally from `MulAction β α` when `H` is a normal subgroup and acts trivially on `α`. We also instance `IsometricSMul (M ⧸ N) X` in this way. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-group-theory large-import 53/1 Mathlib/GroupTheory/GroupAction/Quotient.lean,Mathlib/Topology/MetricSpace/IsometricSMul.lean 2 6 ['YaelDillies', 'github-actions', 'grunweg', 'urkud'] eric-wieser
assignee:eric-wieser
254-65354
8 months ago
467-66693
467 days ago
193-74502
193 days
27886 alreadydone
author:alreadydone
 feat(Algebra): (Mv)Polynomial.X is irreducible assuming NoZeroDivisors --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 178/66 Archive/Examples/Eisenstein.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/Polynomial/Basic.lean,Mathlib/Algebra/Polynomial/Degree/Domain.lean,Mathlib/Algebra/Polynomial/Degree/Units.lean,Mathlib/Algebra/Polynomial/Monic.lean,Mathlib/Algebra/Polynomial/RingDivision.lean,Mathlib/Combinatorics/Nullstellensatz.lean,Mathlib/RingTheory/MvPolynomial/Groebner.lean,Mathlib/RingTheory/MvPolynomial/MonomialOrder.lean,Mathlib/RingTheory/MvPolynomial/MonomialOrder/DegLex.lean,Mathlib/RingTheory/Polynomial/Content.lean,Mathlib/RingTheory/Polynomial/Eisenstein/Criterion.lean 13 3 ['alreadydone', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
254-63089
8 months ago
255-69830
255 days ago
0-80025
22 hours
26200 adomani
author:adomani
 fix: add label when landrun fails Adds the `permission-denied` label on PRs that get blocked by landrun. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict CI 68/8 .github/build.in.yml,.github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build_fork.yml 4 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
254-14556
8 months ago
254-14556
254 days ago
46-52210
46 days
17469 joelriou
author:joelriou
 feat(Algebra/ModuleCat/Differentials/Presheaf): the presheaf of relative differentials Given a functor `F : C ⥤ D`, presheaves of commutative rings `S`, `R` and a morphism `φ : S ⟶ F.op ⋙ R`, we show that derivations relative to `φ` are representable by a presheaf of `R`-modules. This is obtained by reducing to the case of absolute differentials. The construction shall allow to deduce the presheaf version of the cokernel sequence $$f^\star \Omega_{Y/S} ⟶ \Omega_{X/S} ⟶ \Omega_{X/Y} ⟶ 0$$ when `f : X ⟶ Y` and `g : Y ⟶ S` are morphisms of schemes. --- - [x] depends on: #17366 - [x] depends on: #19507 - [x] depends on: #17388 - [x] depends on: #16755 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-category-theory large-import merge-conflict t-algebraic-geometry 391/10 Mathlib/Algebra/Category/ModuleCat/Differentials/Presheaf.lean 1 4 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
254-9905
8 months ago
557-53012
557 days ago
0-530
8 minutes
25288 robertmaxton42
author:robertmaxton42
 feat(CategoryTheory): generalize `Discrete` to arbitrary morphism levels Using an unused `let`, add an 'anchor' to the definition of `Discrete`, allowing it to carry a second universe level that is then used to permit discrete categories to live in any `Cat.{v, u}`. (This trick was borrowed from the code of `ULiftHom`.) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory 38/32 Mathlib/CategoryTheory/Bicategory/LocallyDiscrete.lean,Mathlib/CategoryTheory/Discrete/Basic.lean,Mathlib/CategoryTheory/IsConnected.lean 3 3 ['github-actions', 'joelriou', 'mathlib4-merge-conflict-bot'] nobody
253-85664
8 months ago
322-75185
322 days ago
0-444
7 minutes
27709 kckennylau
author:kckennylau
 chore: fix links --- See https://github.com/leanprover-community/mathlib4/pull/27545#discussion_r2238206933 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 269/256 Mathlib/Algebra/Algebra/Bilinear.lean,Mathlib/Algebra/GCDMonoid/Multiset.lean,Mathlib/Algebra/Group/Even.lean,Mathlib/Algebra/Group/Pi/Basic.lean,Mathlib/Algebra/Group/Pi/Lemmas.lean,Mathlib/Algebra/Group/TypeTags/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Basic.lean,Mathlib/Algebra/Homology/Embedding/Basic.lean,Mathlib/Algebra/Module/Hom.lean,Mathlib/Algebra/Module/Submodule/Bilinear.lean,Mathlib/Algebra/Order/Field/Pi.lean,Mathlib/Algebra/Order/GroupWithZero/Unbundled/Basic.lean,Mathlib/Algebra/Order/Hom/Basic.lean,Mathlib/Algebra/Order/Monovary.lean,Mathlib/Algebra/Order/Ring/Unbundled/Basic.lean,Mathlib/Algebra/Order/Ring/Unbundled/Rat.lean,Mathlib/Algebra/Ring/Basic.lean,Mathlib/Algebra/Squarefree/Basic.lean,Mathlib/Algebra/Star/BigOperators.lean,Mathlib/Algebra/Star/Free.lean,Mathlib/Algebra/Star/SelfAdjoint.lean,Mathlib/Analysis/Analytic/RadiusLiminf.lean,Mathlib/Analysis/CStarAlgebra/Matrix.lean,Mathlib/Analysis/Calculus/Conformal/NormedSpace.lean,Mathlib/Analysis/Calculus/Deriv/Add.lean,Mathlib/Analysis/Calculus/Deriv/Inv.lean,Mathlib/Analysis/Calculus/Deriv/Inverse.lean,Mathlib/Analysis/Calculus/Deriv/Linear.lean,Mathlib/Analysis/Calculus/Deriv/Mul.lean,Mathlib/Analysis/Complex/Basic.lean,Mathlib/Analysis/Complex/Circle.lean,Mathlib/Analysis/Complex/OperatorNorm.lean,Mathlib/Analysis/Convex/Function.lean,Mathlib/Analysis/Convex/Jensen.lean,Mathlib/Analysis/Meromorphic/IsolatedZeros.lean,Mathlib/Analysis/Normed/Operator/BoundedLinearMaps.lean,Mathlib/Analysis/SpecialFunctions/Exponential.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Basic.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Bounds.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/EulerSineProd.lean,Mathlib/CategoryTheory/Abelian/Opposite.lean,Mathlib/CategoryTheory/Adjunction/Opposites.lean,Mathlib/CategoryTheory/Bicategory/Functor/Pseudofunctor.lean,Mathlib/CategoryTheory/Closed/Monoidal.lean,Mathlib/CategoryTheory/Limits/Shapes/Kernels.lean,Mathlib/CategoryTheory/Localization/Equivalence.lean,Mathlib/CategoryTheory/Localization/Trifunctor.lean,Mathlib/CategoryTheory/ObjectProperty/Basic.lean,Mathlib/CategoryTheory/Sites/Coherent/SheafComparison.lean,Mathlib/Combinatorics/Colex.lean,Mathlib/Combinatorics/Hall/Finite.lean,Mathlib/Combinatorics/Pigeonhole.lean,Mathlib/Combinatorics/Quiver/Covering.lean,Mathlib/Combinatorics/Quiver/Path.lean,Mathlib/Control/LawfulFix.lean,Mathlib/Data/Complex/Basic.lean,Mathlib/Data/Fin/Pigeonhole.lean,Mathlib/Data/FinEnum/Option.lean,Mathlib/Data/Finset/Filter.lean,Mathlib/Data/Finsupp/Fin.lean,Mathlib/Data/Fintype/BigOperators.lean,Mathlib/Data/Fintype/Defs.lean,Mathlib/Data/Int/Basic.lean,Mathlib/Data/Int/Cast/Basic.lean,Mathlib/Data/Int/Cast/Lemmas.lean,Mathlib/Data/Int/Lemmas.lean,Mathlib/Data/Int/Order/Lemmas.lean,Mathlib/Data/Int/Range.lean,Mathlib/Data/List/Chain.lean,Mathlib/Data/List/Dedup.lean,Mathlib/Data/List/Destutter.lean,Mathlib/Data/List/Forall2.lean,Mathlib/Data/List/Lattice.lean,Mathlib/Data/List/Lemmas.lean,Mathlib/Data/List/Nodup.lean,Mathlib/Data/List/Pairwise.lean,Mathlib/Data/List/Permutation.lean,Mathlib/Data/List/ProdSigma.lean,Mathlib/Data/List/Sections.lean,Mathlib/Data/List/Sublists.lean,Mathlib/Data/Matrix/Notation.lean,Mathlib/Data/Matroid/Minor/Restrict.lean,Mathlib/Data/Multiset/FinsetOps.lean,Mathlib/Data/Nat/Basic.lean,Mathlib/Data/Nat/Cast/WithTop.lean,Mathlib/Data/Nat/Choose/Basic.lean,Mathlib/Data/Nat/Factorization/Basic.lean,Mathlib/Data/Nat/Factorization/LCM.lean,Mathlib/Data/PSigma/Order.lean,Mathlib/Data/Prod/Lex.lean,Mathlib/Data/Rat/Encodable.lean,Mathlib/Data/Set/Card.lean,Mathlib/Data/Set/Defs.lean,Mathlib/Data/Set/Finite/Basic.lean,Mathlib/Data/Set/Finite/Lattice.lean,Mathlib/Data/Set/Functor.lean,Mathlib/Data/Set/Notation.lean,Mathlib/Data/Set/Pairwise/Basic.lean,Mathlib/Data/Set/Prod.lean,Mathlib/Data/Sigma/Lex.lean 157 87 ['github-actions', 'kbuzzard', 'kckennylau', 'mathlib4-merge-conflict-bot'] nobody
253-83875
8 months ago
260-11116
260 days ago
0-9
9 seconds
10345 newell
author:newell
 feat(Algebra.Module.Zlattice): Add Voronoi Domain Adds the definition for a Voronoi Domain in regards to the $\mathbb{Z}$-lattice: $$C := \lbrace\mathbf{w} \in \mathbb{V}^n\ :\ |\mathbf{w}| \leq |\mathbf{w} - \mathbf{v}|\ \text{for all}\ \mathbf{v} \in \mathbf{L} \rbrace$$ where $\mathbf{L}\$ is the $\mathbb{Z}$-lattice. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra
label:t-algebra$
 17/0 Mathlib/Algebra/Module/Zlattice.lean 1 3 ['alreadydone', 'newell'] nobody
253-15363
8 months ago
unknown
0-0
0 seconds
28168 astrainfinita
author:astrainfinita
 feat: hensel's lemma for topological rings --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra WIP t-ring-theory t-topology
label:t-algebra$
 616/0 Mathlib/RingTheory/Polynomial/Hensel.lean 1 1 ['github-actions'] nobody
250-9623
8 months ago
unknown
0-0
0 seconds
20671 thefundamentaltheor3m
author:thefundamentaltheor3m
 feat(Analysis/Asymptotics/SpecificAsymptotics): Proving that 𝛔ₖ(n) = O(nᵏ⁺¹) This PR proves a result about the $\sigma_k(n)$ arithmetic function, namely, that it is $O\left(n^{k+1}\right)$. Main theorem: `theorem sigma_asymptotic (k : ℕ) : (fun n ↦ (σ k n : ℝ)) =O[atTop] (fun n ↦ (n ^ (k + 1) : ℝ))` This result was proved as part of the sphere packing project. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory new-contributor large-import merge-conflict awaiting-author 29/0 Mathlib/Analysis/Asymptotics/SpecificAsymptotics.lean 1 3 ['b-mehta', 'github-actions', 'mathlib4-merge-conflict-bot'] b-mehta
assignee:b-mehta
249-69165
8 months ago
450-43980
450 days ago
9-59130
9 days
20267 joelriou
author:joelriou
 feat(CategoryTheory): comma categories are accessible --- (I shall probably not work on this PR in the near future.) - [ ] depends on: #19937 - [ ] depends on: #19945 - [ ] depends on: #19959 - [ ] depends on: #20005 - [ ] depends on: #19955 - [x] depends on: #20263 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP awaiting-author t-category-theory 1513/7 Mathlib.lean,Mathlib/CategoryTheory/Comma/Arrow.lean,Mathlib/CategoryTheory/Comma/CardinalArrow.lean,Mathlib/CategoryTheory/EssentiallySmall.lean,Mathlib/CategoryTheory/Limits/Comma.lean,Mathlib/CategoryTheory/Limits/TypesFiltered.lean,Mathlib/CategoryTheory/Presentable/Basic.lean,Mathlib/CategoryTheory/Presentable/CardinalFilteredPresentation.lean,Mathlib/CategoryTheory/Presentable/Comma.lean,Mathlib/CategoryTheory/Presentable/IsCardinalFiltered.lean,Mathlib/CategoryTheory/Presentable/Limits.lean,Mathlib/CategoryTheory/Presentable/LocallyPresentable.lean,Mathlib/CategoryTheory/Presentable/ParallelMaps.lean,Mathlib/SetTheory/Cardinal/HasCardinalLT.lean,docs/references.bib 15 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
249-62132
8 months ago
unknown
0-0
0 seconds
27451 kckennylau
author:kckennylau
 feat(RingTheory/Valuation): define ball, closed ball, and sphere *From the 2025 Local Class Field Theory Workshop.* --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-ring-theory 27/0 Mathlib/RingTheory/Valuation/Basic.lean 1 13 ['JovanGerb', 'github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot', 'pechersky', 'wwylele'] nobody
248-47059
8 months ago
248-47060
248 days ago
17-52359
17 days
27987 kckennylau
author:kckennylau
 feat(RingTheory/Valuation): define ball, closed ball, and sphere --- The pullback PR of #26827 and #27451. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-ring-theory large-import 73/0 Mathlib/RingTheory/Valuation/Basic.lean 1 4 ['JovanGerb', 'github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot'] nobody
248-46688
8 months ago
248-46689
248 days ago
6-6455
6 days
27444 grunweg
author:grunweg
 feat: generalise more lemmas to enorms The selection of lemmas may seem eclectic, but follows a clear path: I'm working on generalising the last section of `IntegrableOn.lean` to enorms. (This will be continued in a later PR.) --- Commits can be reviewed independently. - [x] depends on: #27419 (first commits) - [x] depends on: #27456 (last commits) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) carleson WIP 10/0 Mathlib/MeasureTheory/Function/L1Space/HasFiniteIntegral.lean 1 3 ['github-actions', 'grunweg', 'mathlib4-dependent-issues-bot'] nobody
248-42684
8 months ago
248-42720
248 days ago
0-749
12 minutes
24862 grunweg
author:grunweg
 feat(LocallyIntegrable): generalise more to enorms --- Note: github's diff is very confused; it includes changes which very clearly are already on the master branch. I'll see which of the remaining changes after the dependencies have landed is already polished enough. - [x] depends on: #24352 - [x] depends on: #27457 (this half is settled already) - [ ] open question: filter lemmas; IsBoundedUnder is not the right condition as-is; need to think (or just not generalise) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP carleson t-measure-probability 171/88 Mathlib/MeasureTheory/Function/L1Space/HasFiniteIntegral.lean,Mathlib/MeasureTheory/Function/LocallyIntegrable.lean,Mathlib/MeasureTheory/Integral/IntegrableOn.lean 3 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
248-40409
8 months ago
338-21768
338 days ago
0-1
1 second
25133 erdOne
author:erdOne
 feat(Tactic/NormNum): support positive characteristic Co-authored-by: Heather Macbeth --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP large-import t-meta 250/39 Mathlib/Tactic/NormNum/CharP.lean,Mathlib/Tactic/NormNum/Core.lean,Mathlib/Tactic/NormNum/Eq.lean,Mathlib/Tactic/NormNum/Inv.lean,Mathlib/Tactic/NormNum/Test.lean 5 5 ['erdOne', 'eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
246-61848
8 months ago
unknown
0-0
0 seconds
27003 eric-wieser
author:eric-wieser
 chore: use `Simp.ResultQ` more often Also uses `~q` in place of manual `isDefEq` matching. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta 18/22 Mathlib/Tactic/NormNum/Core.lean,Mathlib/Tactic/NormNum/Result.lean,Mathlib/Tactic/ReduceModChar.lean 3 7 ['JovanGerb', 'eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot'] JovanGerb
assignee:JovanGerb
246-61312
8 months ago
246-61313
246 days ago
32-70098
32 days
22925 ggranberry
author:ggranberry
 feat(Mathlib/PlaceHolder/ToeplitzHausdorff): Toeplitz-Hausdorff --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP new-contributor will-close-soon awaiting-author help-wanted t-analysis 411/0 Mathlib/PlaceHolder/ToeplitzHausdorff.lean,Mathlib/PlaceHolder/ToeplitzHausdorff_v2.lean 2 11 ['faenuccio', 'ggranberry', 'github-actions'] faenuccio
assignee:faenuccio
246-61035
8 months ago
394-45917
394 days ago
0-1302
21 minutes
16150 urkud
author:urkud
 feat(Dynamics): Hopf decomposition Prove Hopf decomposition. - [ ] rewrite to work with the saturations right away, not with a wandering set. - [ ] generalize to an action of a countable group, use fundamental domains. --- - [ ] depends on: #16146 - [ ] depends on: #16126 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-dynamics t-measure-probability 212/0 Mathlib.lean,Mathlib/Dynamics/Ergodic/Dissipative.lean,Mathlib/MeasureTheory/MeasurableSpace/Basic.lean 3 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'urkud'] nobody
246-29284
8 months ago
unknown
0-0
0 seconds
25401 digama0
author:digama0
 feat(Util): SuppressSorry option See also leanprover/lean4#8611 and [#lean4 > Silent sorry @ 💬](https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/Silent.20sorry/near/503537964). This is a stop-gap solution while leanprover/lean4#8611 is underway, but it works about as well as any other built in option. Hooking declaration elaborators turns out to be a very powerful technique. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta 342/0 Mathlib.lean,Mathlib/Util/CommandElabHook.lean,Mathlib/Util/SuppressSorry.lean,MathlibTest/suppressSorry.lean 4 15 ['digama0', 'eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot'] alexjbest
assignee:alexjbest
246-16108
8 months ago
246-16108
246 days ago
71-28496
71 days
27759 plp127
author:plp127
 chore(FreeAbelianGroup): deprecate multiplication Deprecate multiplication on `FreeAbelianGroup` in favor of using `MonoidAlgebra`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra large-import
label:t-algebra$
 176/86 Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/MonoidAlgebra/MapDomain.lean,Mathlib/GroupTheory/FreeAbelianGroup.lean,Mathlib/RingTheory/FreeCommRing.lean,Mathlib/RingTheory/FreeRing.lean 5 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
244-68954
8 months ago
258-47790
258 days ago
0-5704
1 hour
7873 astrainfinita
author:astrainfinita
 perf: reorder `extends` and change instance priority in algebra hierarchy There are no strict rules, but in general `Cancel` is dropped first, then `Comm`, then `Neg / Inv`, then `Assoc`. Not sure if there's a better way. --- - [ ] depends on: #14712 - [x] depends on: #16638 - [ ] depends on: #18464 - [ ] depends on: #18468 - [ ] depends on: #18470 - [ ] depends on: #18472 - [ ] depends on: #18474 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict slow-typeclass-synthesis t-algebra blocked-by-other-PR
label:t-algebra$
 494/204 Archive/Imo/Imo1998Q2.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Associated.lean,Mathlib/Algebra/BigOperators/Ring/List.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Limits.lean,Mathlib/Algebra/DirectSum/Algebra.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/EuclideanDomain/Defs.lean,Mathlib/Algebra/EuclideanDomain/Field.lean,Mathlib/Algebra/Field/Basic.lean,Mathlib/Algebra/Field/Defs.lean,Mathlib/Algebra/Field/IsField.lean,Mathlib/Algebra/GCDMonoid/Basic.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Ext.lean,Mathlib/Algebra/Group/InjSurj.lean,Mathlib/Algebra/Group/Opposite.lean,Mathlib/Algebra/Group/Prod.lean,Mathlib/Algebra/GroupWithZero/Basic.lean,Mathlib/Algebra/GroupWithZero/Defs.lean,Mathlib/Algebra/GroupWithZero/InjSurj.lean,Mathlib/Algebra/GroupWithZero/Prod.lean,Mathlib/Algebra/GroupWithZero/Semiconj.lean,Mathlib/Algebra/GroupWithZero/Units/Basic.lean,Mathlib/Algebra/Homology/Embedding/Basic.lean,Mathlib/Algebra/Homology/HomotopyCategory/DegreewiseSplit.lean,Mathlib/Algebra/Homology/HomotopyCategory/ShiftSequence.lean,Mathlib/Algebra/Lie/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Grading.lean,Mathlib/Algebra/Order/AddGroupWithTop.lean,Mathlib/Algebra/Order/Field/Canonical/Defs.lean,Mathlib/Algebra/Order/Field/Defs.lean,Mathlib/Algebra/Order/Group/Abs.lean,Mathlib/Algebra/Order/Group/Defs.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/Kleene.lean,Mathlib/Algebra/Order/Monoid/Defs.lean,Mathlib/Algebra/Order/Ring/Canonical.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Polynomial/Roots.lean,Mathlib/Algebra/Quaternion.lean,Mathlib/Algebra/Ring/BooleanRing.lean,Mathlib/Algebra/Ring/Defs.lean,Mathlib/Algebra/Ring/Ext.lean,Mathlib/Algebra/Ring/InjSurj.lean,Mathlib/Algebra/Ring/Rat.lean,Mathlib/Algebra/Tropical/Basic.lean,Mathlib/Analysis/Fourier/FourierTransformDeriv.lean,Mathlib/Analysis/InnerProductSpace/Orientation.lean,Mathlib/Analysis/InnerProductSpace/Symmetric.lean,Mathlib/Analysis/Normed/Field/Basic.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Analysis/NormedSpace/Star/Multiplier.lean,Mathlib/CategoryTheory/Preadditive/FunctorCategory.lean,Mathlib/CategoryTheory/Preadditive/SingleObj.lean,Mathlib/CategoryTheory/Triangulated/Functor.lean,Mathlib/Data/Finset/NoncommProd.lean,Mathlib/Data/Int/Cast/Defs.lean,Mathlib/Data/Nat/Cast/Defs.lean,Mathlib/Data/Nat/Choose/Multinomial.lean,Mathlib/Data/Num/Lemmas.lean,Mathlib/Data/Rat/Denumerable.lean,Mathlib/Data/Real/ENatENNReal.lean,Mathlib/Dynamics/Ergodic/AddCircle.lean,Mathlib/FieldTheory/KummerExtension.lean,Mathlib/GroupTheory/Congruence/Basic.lean,Mathlib/GroupTheory/MonoidLocalization.lean,Mathlib/GroupTheory/SpecificGroups/Alternating.lean,Mathlib/GroupTheory/Torsion.lean,Mathlib/Init/ZeroOne.lean,Mathlib/LinearAlgebra/LinearPMap.lean,Mathlib/LinearAlgebra/Orientation.lean,Mathlib/LinearAlgebra/QuadraticForm/Basic.lean,Mathlib/LinearAlgebra/TensorPower.lean,Mathlib/LinearAlgebra/TensorProduct/Basic.lean,Mathlib/LinearAlgebra/TensorProduct/Graded/External.lean,Mathlib/MeasureTheory/Decomposition/Jordan.lean,Mathlib/MeasureTheory/Decomposition/SignedLebesgue.lean,Mathlib/NumberTheory/ArithmeticFunction.lean,Mathlib/NumberTheory/LegendreSymbol/GaussEisensteinLemmas.lean,Mathlib/NumberTheory/RamificationInertia.lean,Mathlib/NumberTheory/WellApproximable.lean,Mathlib/NumberTheory/Zsqrtd/QuadraticReciprocity.lean,Mathlib/Order/Filter/Germ.lean,Mathlib/Order/Interval/Finset/Box.lean,Mathlib/RingTheory/Bialgebra/Hom.lean,Mathlib/RingTheory/Coalgebra/Hom.lean,Mathlib/RingTheory/DiscreteValuationRing/Basic.lean,Mathlib/RingTheory/Filtration.lean,Mathlib/RingTheory/Henselian.lean,Mathlib/RingTheory/Ideal/IsPrincipal.lean,Mathlib/RingTheory/Ideal/LocalRing.lean,Mathlib/RingTheory/Ideal/Norm.lean,Mathlib/RingTheory/Localization/Integral.lean,Mathlib/RingTheory/MvPolynomial/Symmetric.lean,Mathlib/RingTheory/TensorProduct/Basic.lean,Mathlib/RingTheory/TensorProduct/MvPolynomial.lean,Mathlib/RingTheory/UniqueFactorizationDomain.lean,Mathlib/RingTheory/Valuation/ValuationSubring.lean,Mathlib/Tactic/Positivity/Core.lean 104 84 ['MichaelStollBayreuth', 'astrainfinita', 'github-actions', 'kim-em', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'mattrobball'] nobody
244-39458
8 months ago
642-37410
642 days ago
7-77799
7 days
21776 alreadydone
author:alreadydone
 Invertible modules --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 571/26 Mathlib/Algebra/Algebra/Operations.lean,Mathlib/Algebra/Module/Submodule/Equiv.lean,Mathlib/Data/Set/Semiring.lean,Mathlib/RingTheory/FractionalIdeal/Operations.lean,Mathlib/RingTheory/PicardGroup.lean 5 3 ['alreadydone', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
243-68503
8 months ago
428-80992
428 days ago
0-19
19 seconds
20722 ctchou
author:ctchou
 feat(Counterexamples): the Vitali set is non-measurable --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt t-measure-probability new-contributor merge-conflict awaiting-author 258/3 Counterexamples.lean,Counterexamples/VitaliSetNotMeasurable.lean,Mathlib/MeasureTheory/Measure/NullMeasurable.lean,docs/1000.yaml 4 76 ['ctchou', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot', 'vihdzp'] vihdzp
assignee:vihdzp
243-58849
8 months ago
457-50819
457 days ago
0-47663
13 hours
27446 grunweg
author:grunweg
 chore: more enorm lemmas Nothing to see yet: this is a big mess! Start unrolling at `eLpNorm_le_eLpNorm_top_mul_eLpNorm_enorm`; that proof could be a good next target. Need a version of `eLpNorm'_const_smul' which applies to NNReal (or ENNReal, I guess): need to generalise a bunch of lemmas for that. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP carleson 107/9 Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Function/LpSeminorm/CompareExp.lean,Mathlib/MeasureTheory/Integral/IntegrableOn.lean 3 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] nobody
243-50363
8 months ago
266-24918
266 days ago
0-92
1 minute
14583 lecopivo
author:lecopivo
 fix: make concrete cycle notation local fix: make c[...] notation for concrete cycles local --- The notation for concrete cycles prevents you using `c[i]` notation for `c : Array _` This currently does not work ``` import Mathlib variable (c : Array Nat) (i : Fin c.size) #check c[i] -- breaks because of notation for concrete cycles ``` This PR just marks it as local to prevent this issue. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author 1/1 Mathlib/GroupTheory/Perm/Cycle/Concrete.lean 1 3 ['eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
241-69677
7 months ago
646-19843
646 days ago
0-12793
3 hours
5897 eric-wieser
author:eric-wieser
 feat: add a `MonadError` instance for `ContT` We already have a `MonadExcept` instance; this promotes it to `MonadError`. Note the issue with the existing `MonadExcept` instance still applies. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-meta 16/0 Mathlib/Control/Monad/Cont.lean 1 25 ['Vierkantor', 'YaelDillies', 'eric-wieser', 'github-actions', 'kmill'] nobody
241-59663
7 months ago
667-72465
667 days ago
339-54818
339 days
28276 eric-wieser
author:eric-wieser
 refactor: tidy `lift_unique` lemmas --- - [ ] depends on: #28275 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 37/20 Mathlib/Algebra/FreeAlgebra.lean,Mathlib/Algebra/Lie/UniversalEnveloping.lean,Mathlib/LinearAlgebra/DFinsupp.lean,Mathlib/LinearAlgebra/ExteriorAlgebra/Basic.lean 4 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
241-58934
7 months ago
unknown
0-0
0 seconds
28502 gilesgshaw
author:gilesgshaw
 feat(Logic/Basic): avoid unnecessary uses of choice Certain proofs are modified to remove a dependence on the axoim of choice --- - [ ] depends on: #28623 blocked-by-other-PR new-contributor merge-conflict awaiting-author t-logic 83/74 Mathlib/Logic/Basic.lean 1 7 ['Ruben-VandeVelde', 'eric-wieser', 'gilesgshaw', 'github-actions', 'kim-em', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
240-80661
7 months ago
243-66190
243 days ago
0-35689
9 hours
28622 alreadydone
author:alreadydone
 chore(Mathlib): replace `=>` by `↦` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 51792/51792 Mathlib/Algebra/AddTorsor/Basic.lean,Mathlib/Algebra/AddTorsor/Defs.lean,Mathlib/Algebra/Algebra/Basic.lean,Mathlib/Algebra/Algebra/Bilinear.lean,Mathlib/Algebra/Algebra/Defs.lean,Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Algebra/Hom/Rat.lean,Mathlib/Algebra/Algebra/NonUnitalHom.lean,Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/Algebra/Operations.lean,Mathlib/Algebra/Algebra/Opposite.lean,Mathlib/Algebra/Algebra/Prod.lean,Mathlib/Algebra/Algebra/Rat.lean,Mathlib/Algebra/Algebra/Spectrum/Basic.lean,Mathlib/Algebra/Algebra/Spectrum/Pi.lean,Mathlib/Algebra/Algebra/Spectrum/Quasispectrum.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Centralizer.lean,Mathlib/Algebra/Algebra/Subalgebra/Directed.lean,Mathlib/Algebra/Algebra/Subalgebra/IsSimpleOrder.lean,Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/Algebra/Algebra/Subalgebra/Matrix.lean,Mathlib/Algebra/Algebra/Subalgebra/Operations.lean,Mathlib/Algebra/Algebra/Subalgebra/Pointwise.lean,Mathlib/Algebra/Algebra/Subalgebra/Prod.lean,Mathlib/Algebra/Algebra/Subalgebra/Unitization.lean,Mathlib/Algebra/Algebra/Tower.lean,Mathlib/Algebra/Algebra/TransferInstance.lean,Mathlib/Algebra/Algebra/Unitization.lean,Mathlib/Algebra/Algebra/ZMod.lean,Mathlib/Algebra/AlgebraicCard.lean,Mathlib/Algebra/BigOperators/Associated.lean,Mathlib/Algebra/BigOperators/Expect.lean,Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/BigOperators/Finsupp/Basic.lean,Mathlib/Algebra/BigOperators/Finsupp/Fin.lean,Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean,Mathlib/Algebra/BigOperators/Group/Finset/Defs.lean,Mathlib/Algebra/BigOperators/Group/Finset/Piecewise.lean,Mathlib/Algebra/BigOperators/Group/Finset/Sigma.lean,Mathlib/Algebra/BigOperators/Group/List/Basic.lean,Mathlib/Algebra/BigOperators/Group/List/Defs.lean,Mathlib/Algebra/BigOperators/Group/List/Lemmas.lean,Mathlib/Algebra/BigOperators/Group/Multiset/Basic.lean,Mathlib/Algebra/BigOperators/Group/Multiset/Defs.lean,Mathlib/Algebra/BigOperators/GroupWithZero/Finset.lean,Mathlib/Algebra/BigOperators/Intervals.lean,Mathlib/Algebra/BigOperators/Option.lean,Mathlib/Algebra/BigOperators/Pi.lean,Mathlib/Algebra/BigOperators/Ring/Finset.lean,Mathlib/Algebra/BigOperators/Ring/Multiset.lean,Mathlib/Algebra/Category/AlgCat/Basic.lean,Mathlib/Algebra/Category/AlgCat/Limits.lean,Mathlib/Algebra/Category/AlgCat/Monoidal.lean,Mathlib/Algebra/Category/BialgCat/Basic.lean,Mathlib/Algebra/Category/BoolRing.lean,Mathlib/Algebra/Category/CoalgCat/Basic.lean,Mathlib/Algebra/Category/CoalgCat/ComonEquivalence.lean,Mathlib/Algebra/Category/FGModuleCat/Limits.lean,Mathlib/Algebra/Category/Grp/AB.lean,Mathlib/Algebra/Category/Grp/Adjunctions.lean,Mathlib/Algebra/Category/Grp/Basic.lean,Mathlib/Algebra/Category/Grp/Biproducts.lean,Mathlib/Algebra/Category/Grp/CartesianMonoidal.lean,Mathlib/Algebra/Category/Grp/Colimits.lean,Mathlib/Algebra/Category/Grp/EpiMono.lean,Mathlib/Algebra/Category/Grp/FilteredColimits.lean,Mathlib/Algebra/Category/Grp/Images.lean,Mathlib/Algebra/Category/Grp/Kernels.lean,Mathlib/Algebra/Category/Grp/LargeColimits.lean,Mathlib/Algebra/Category/Grp/LeftExactFunctor.lean,Mathlib/Algebra/Category/Grp/Limits.lean,Mathlib/Algebra/Category/Grp/Preadditive.lean,Mathlib/Algebra/Category/Grp/ZModuleEquivalence.lean,Mathlib/Algebra/Category/Grp/Zero.lean,Mathlib/Algebra/Category/GrpWithZero.lean,Mathlib/Algebra/Category/HopfAlgCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Adjunctions.lean,Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Biproducts.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/Colimits.lean,Mathlib/Algebra/Category/ModuleCat/EpiMono.lean,Mathlib/Algebra/Category/ModuleCat/FilteredColimits.lean,Mathlib/Algebra/Category/ModuleCat/Images.lean,Mathlib/Algebra/Category/ModuleCat/Injective.lean,Mathlib/Algebra/Category/ModuleCat/Kernels.lean,Mathlib/Algebra/Category/ModuleCat/Limits.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Closed.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Symmetric.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Abelian.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Colimits.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Limits.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Pushforward.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Sheafify.lean,Mathlib/Algebra/Category/ModuleCat/Products.lean 3838 4 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
240-19588
7 months ago
240-19589
240 days ago
0-66771
18 hours
24793 tristan-f-r
author:tristan-f-r
 feat: trace of unitarily similar matrices adds a theorem relating trace to unitarily similar matrices used in the easy direction of specht's theorem --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 7/0 Mathlib/LinearAlgebra/UnitaryGroup.lean 1 4 ['github-actions', 'j-loreaux', 'mathlib4-merge-conflict-bot', 'tristan-f-r'] nobody
240-15227
7 months ago
338-46676
338 days ago
1-55872
1 day
28626 alreadydone
author:alreadydone
 chore(Archive, Counterexamples): replace => by ↦ --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 288/288 Archive/Arithcc.lean,Archive/Examples/IfNormalization/Result.lean,Archive/Examples/IfNormalization/WithoutAesop.lean,Archive/Examples/PropEncodable.lean,Archive/Imo/Imo1959Q1.lean,Archive/Imo/Imo1960Q1.lean,Archive/Imo/Imo1962Q4.lean,Archive/Imo/Imo1972Q5.lean,Archive/Imo/Imo1977Q6.lean,Archive/Imo/Imo1981Q3.lean,Archive/Imo/Imo1987Q1.lean,Archive/Imo/Imo1988Q6.lean,Archive/Imo/Imo1994Q1.lean,Archive/Imo/Imo1998Q2.lean,Archive/Imo/Imo2001Q2.lean,Archive/Imo/Imo2006Q3.lean,Archive/Imo/Imo2006Q5.lean,Archive/Imo/Imo2008Q2.lean,Archive/Imo/Imo2008Q4.lean,Archive/Imo/Imo2011Q3.lean,Archive/Imo/Imo2013Q1.lean,Archive/Imo/Imo2019Q1.lean,Archive/Imo/Imo2024Q5.lean,Archive/MiuLanguage/Basic.lean,Archive/MiuLanguage/DecisionSuf.lean,Archive/OxfordInvariants/Summer2021/Week3P1.lean,Archive/Sensitivity.lean,Archive/Wiedijk100Theorems/AbelRuffini.lean,Archive/Wiedijk100Theorems/AreaOfACircle.lean,Archive/Wiedijk100Theorems/AscendingDescendingSequences.lean,Archive/Wiedijk100Theorems/BallotProblem.lean,Archive/Wiedijk100Theorems/BirthdayProblem.lean,Archive/Wiedijk100Theorems/BuffonsNeedle.lean,Archive/Wiedijk100Theorems/CubingACube.lean,Archive/Wiedijk100Theorems/FriendshipGraphs.lean,Archive/Wiedijk100Theorems/Konigsberg.lean,Archive/Wiedijk100Theorems/Partition.lean,Archive/Wiedijk100Theorems/SumOfPrimeReciprocalsDiverges.lean,Archive/ZagierTwoSquares.lean,Counterexamples/AharoniKorman.lean,Counterexamples/CanonicallyOrderedCommSemiringTwoMul.lean,Counterexamples/CharPZeroNeCharZero.lean,Counterexamples/CliffordAlgebraNotInjective.lean,Counterexamples/DirectSumIsInternal.lean,Counterexamples/GameMultiplication.lean,Counterexamples/Girard.lean,Counterexamples/HomogeneousPrimeNotPrime.lean,Counterexamples/MapFloor.lean,Counterexamples/MonicNonRegular.lean,Counterexamples/Phillips.lean,Counterexamples/Pseudoelement.lean,Counterexamples/QuadraticForm.lean,Counterexamples/SorgenfreyLine.lean,Counterexamples/ZeroDivisorsInAddMonoidAlgebras.lean 54 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
238-48714
7 months ago
238-48715
238 days ago
2-47570
2 days
19582 yu-yama
author:yu-yama
 feat(GroupExtension/Abelian): define `OfMulDistribMulAction.equivH2` Mainly defines: - `structure GroupExtension.OfMulDistribMulAction N G [MulDistribMulAction G N]`: group extensions of `G` by `N` where the multiplicative action of `G` on `N` is the conjugation - `structure GroupExtension.OfMulDistribMulActionWithSection N G [MulDistribMulAction G N]`: group extensions with specific choices of sections - `def GroupExtension.OfMulDistribMulAction.equivH2`: a bijection between the equivalence classes of group extensions and $H^2 (G, N)$ --- - [x] depends on: #20802 (split PR: contains changes to the `Defs` file) - [x] depends on: #20998 (split PR: mainly adds the `Basic` file) - [ ] depends on: #26670 (split PR: adds the first part of the `Abelian` file) Here is a relevant TODO in Mathlib: https://github.com/leanprover-community/mathlib4/blob/4e9fa40d7c480937e09cd6e47a591bd6f3b8be42/Mathlib/RepresentationTheory/GroupCohomology/LowDegree.lean#L46-L48 I would appreciate your comments. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra blocked-by-other-PR new-contributor
label:t-algebra$
 750/14 Mathlib.lean,Mathlib/GroupTheory/GroupExtension/Abelian.lean,Mathlib/GroupTheory/GroupExtension/Defs.lean,docs/references.bib 4 5 ['YaelDillies', 'erdOne', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
238-30769
7 months ago
461-1328
461 days ago
43-22586
43 days
7300 ah1112
author:ah1112
 feat: synthetic geometry This is adding synthetic geometry using Avigad's axioms and formalizing Euclid Book I, through the Pythagorean theorem. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author help-wanted t-euclidean-geometry 2661/0 Mathlib.lean,Mathlib/Geometry/Synthetic/Avigad/Axioms.lean,Mathlib/Geometry/Synthetic/Avigad/EuclidBookI.lean,Mathlib/Geometry/Synthetic/Avigad/Tactics.lean 4 74 ['ah1112', 'alreadydone', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant', 'plp127', 'tb65536', 'urkud'] nobody
238-7400
7 months ago
938-46285
938 days ago
0-84
1 minute
28095 Equilibris
author:Equilibris
 Univ generic corec Draft PR: Adding variable universe corecursor for PFunctor --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict new-contributor 321/70 Mathlib/Data/PFunctor/Multivariate/Basic.lean,Mathlib/Data/PFunctor/Multivariate/M.lean,Mathlib/Data/TypeVec.lean 3 7 ['Equilibris', 'alexkeizer', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
237-16031
7 months ago
unknown
0-0
0 seconds
28150 Equilibris
author:Equilibris
 chore: clean up proofs typevec proofs While adding variable universe corecs I found a lot of theorems in typevec that could do with a bit of a clean-up --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data new-contributor 24/26 Mathlib/Data/TypeVec.lean 1 7 ['Equilibris', 'alexkeizer', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
237-16030
7 months ago
237-16031
237 days ago
13-49738
13 days
27403 MoritzBeroRoos
author:MoritzBeroRoos
 fix: replace probably erroneous usage of ⬝ (with old \cdot) by · (with \centerdot) Discussion at [zulip](https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/.5Ccdot.20!.3D.20.5Ccenterdot). Currently the abbreviations \cdot and \centerdot resolve to different, with the naked eye nearly undistinguishable symbols (despite the c in cdot surely standing for center..). This pr replaces instances of ⬝ where · was probably meant. All of the replacement is in comments, except for the file bench_summary.lean which is used for priting the github benchmark results. Since this file is about scientific notation of numbers, sure · was meant to be used, not a rectangle. [Related](https://github.com/leanprover-community/mathlib4/pull/27399) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict new-contributor 195/195 Mathlib/Algebra/ContinuedFractions/Computation/Approximations.lean,Mathlib/Algebra/DirectSum/Idempotents.lean,Mathlib/Algebra/Lie/Derivation/Basic.lean,Mathlib/Algebra/Module/Equiv/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/DivisionPolynomial/Basic.lean,Mathlib/Analysis/Analytic/Constructions.lean,Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Bounds.lean,Mathlib/Analysis/Calculus/FDeriv/Symmetric.lean,Mathlib/Analysis/Fourier/FourierTransformDeriv.lean,Mathlib/Analysis/InnerProductSpace/Dual.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Analysis/Normed/Unbundled/InvariantExtension.lean,Mathlib/Analysis/SpecialFunctions/Complex/CircleAddChar.lean,Mathlib/Combinatorics/Configuration.lean,Mathlib/Combinatorics/SimpleGraph/AdjMatrix.lean,Mathlib/Combinatorics/SimpleGraph/LapMatrix.lean,Mathlib/Data/Matrix/Block.lean,Mathlib/Data/Matrix/ConjTranspose.lean,Mathlib/Data/Matrix/Hadamard.lean,Mathlib/Data/Matrix/Mul.lean,Mathlib/Data/Matrix/Notation.lean,Mathlib/Data/Matrix/Reflection.lean,Mathlib/Data/Matrix/RowCol.lean,Mathlib/Data/Matrix/Vec.lean,Mathlib/FieldTheory/PurelyInseparable/PerfectClosure.lean,Mathlib/Geometry/Manifold/GroupLieAlgebra.lean,Mathlib/GroupTheory/Coxeter/Matrix.lean,Mathlib/LinearAlgebra/CrossProduct.lean,Mathlib/LinearAlgebra/Matrix/BilinearForm.lean,Mathlib/LinearAlgebra/Matrix/DotProduct.lean,Mathlib/LinearAlgebra/Matrix/Nondegenerate.lean,Mathlib/LinearAlgebra/Matrix/Orthogonal.lean,Mathlib/LinearAlgebra/Matrix/PosDef.lean,Mathlib/LinearAlgebra/Matrix/SchurComplement.lean,Mathlib/LinearAlgebra/Matrix/SesquilinearForm.lean,Mathlib/LinearAlgebra/Matrix/Trace.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/PerfectPairing/Matrix.lean,Mathlib/LinearAlgebra/Projectivization/Constructions.lean,Mathlib/NumberTheory/NumberField/ProductFormula.lean,Mathlib/NumberTheory/SiegelsLemma.lean,Mathlib/RingTheory/DividedPowers/SubDPIdeal.lean,Mathlib/SetTheory/Ordinal/Veblen.lean,Mathlib/Topology/Algebra/Module/Equiv.lean,Mathlib/Topology/Homeomorph/Lemmas.lean,Mathlib/Topology/Instances/Matrix.lean,scripts/bench_summary.lean 49 5 ['eric-wieser', 'github-actions', 'grunweg', 'leanprover-community-bot-assistant'] nobody
236-81750
7 months ago
259-57672
259 days ago
7-54661
7 days
28042 kckennylau
author:kckennylau
 feat(Topology/ValuativeRel): a topological basis indexed by pairs of elements --- The pullback PR of #27314 and #27163. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-ring-theory 140/23 Mathlib/RingTheory/Valuation/ValuativeRel.lean,Mathlib/Topology/Algebra/Valued/ValuativeRel.lean 2 3 ['github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] nobody
236-81704
7 months ago
246-46748
246 days ago
7-4998
7 days
23966 astrainfinita
author:astrainfinita
 refactor: unbundle algebra from `{Seminormed, Normed}(Add)(Comm)Group` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [ ] depends on: #23621 - [ ] depends on: #23961 t-algebra blocked-by-other-PR merge-conflict slow-typeclass-synthesis t-analysis
label:t-algebra$
 3233/2752 Archive/Imo/Imo1998Q2.lean,Counterexamples/LinearOrderWithPosMulPosEqZero.lean,Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Algebra/Module/ZLattice/Covolume.lean,Mathlib/Algebra/Order/Field/Canonical.lean,Mathlib/Algebra/Order/Field/Rat.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/GroupWithZero/Finset.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Order/Nonneg/Field.lean,Mathlib/Algebra/Order/Nonneg/Ring.lean,Mathlib/Algebra/Order/Ring/Nat.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/Analytic/CPolynomial.lean,Mathlib/Analysis/Analytic/CPolynomialDef.lean,Mathlib/Analysis/Analytic/ChangeOrigin.lean,Mathlib/Analysis/Analytic/Composition.lean,Mathlib/Analysis/Analytic/Constructions.lean,Mathlib/Analysis/Analytic/Inverse.lean,Mathlib/Analysis/Analytic/IsolatedZeros.lean,Mathlib/Analysis/Analytic/IteratedFDeriv.lean,Mathlib/Analysis/Analytic/Linear.lean,Mathlib/Analysis/Analytic/Order.lean,Mathlib/Analysis/Analytic/Polynomial.lean,Mathlib/Analysis/Analytic/RadiusLiminf.lean,Mathlib/Analysis/Analytic/Uniqueness.lean,Mathlib/Analysis/Analytic/Within.lean,Mathlib/Analysis/Asymptotics/AsymptoticEquivalent.lean,Mathlib/Analysis/Asymptotics/Defs.lean,Mathlib/Analysis/Asymptotics/Lemmas.lean,Mathlib/Analysis/Asymptotics/SpecificAsymptotics.lean,Mathlib/Analysis/Asymptotics/TVS.lean,Mathlib/Analysis/Asymptotics/Theta.lean,Mathlib/Analysis/BoundedVariation.lean,Mathlib/Analysis/BoxIntegral/Basic.lean,Mathlib/Analysis/BoxIntegral/DivergenceTheorem.lean,Mathlib/Analysis/BoxIntegral/Integrability.lean,Mathlib/Analysis/BoxIntegral/Partition/Additive.lean,Mathlib/Analysis/BoxIntegral/Partition/Measure.lean,Mathlib/Analysis/CStarAlgebra/Basic.lean,Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/CStarAlgebra/ContinuousLinearMap.lean,Mathlib/Analysis/CStarAlgebra/Matrix.lean,Mathlib/Analysis/CStarAlgebra/Module/Constructions.lean,Mathlib/Analysis/CStarAlgebra/Module/Defs.lean,Mathlib/Analysis/Calculus/AddTorsor/AffineMap.lean,Mathlib/Analysis/Calculus/AddTorsor/Coord.lean,Mathlib/Analysis/Calculus/BumpFunction/Basic.lean,Mathlib/Analysis/Calculus/BumpFunction/Convolution.lean,Mathlib/Analysis/Calculus/BumpFunction/FiniteDimension.lean,Mathlib/Analysis/Calculus/BumpFunction/InnerProduct.lean,Mathlib/Analysis/Calculus/BumpFunction/Normed.lean,Mathlib/Analysis/Calculus/Conformal/InnerProduct.lean,Mathlib/Analysis/Calculus/Conformal/NormedSpace.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Bounds.lean,Mathlib/Analysis/Calculus/ContDiff/CPolynomial.lean,Mathlib/Analysis/Calculus/ContDiff/Defs.lean,Mathlib/Analysis/Calculus/ContDiff/FTaylorSeries.lean,Mathlib/Analysis/Calculus/ContDiff/FaaDiBruno.lean,Mathlib/Analysis/Calculus/ContDiff/FiniteDimension.lean,Mathlib/Analysis/Calculus/ContDiff/Operations.lean,Mathlib/Analysis/Calculus/ContDiff/RCLike.lean,Mathlib/Analysis/Calculus/ContDiff/WithLp.lean,Mathlib/Analysis/Calculus/DSlope.lean,Mathlib/Analysis/Calculus/Deriv/Abs.lean,Mathlib/Analysis/Calculus/Deriv/Add.lean,Mathlib/Analysis/Calculus/Deriv/AffineMap.lean,Mathlib/Analysis/Calculus/Deriv/Basic.lean,Mathlib/Analysis/Calculus/Deriv/Comp.lean,Mathlib/Analysis/Calculus/Deriv/Inv.lean,Mathlib/Analysis/Calculus/Deriv/Inverse.lean,Mathlib/Analysis/Calculus/Deriv/Linear.lean,Mathlib/Analysis/Calculus/Deriv/Mul.lean,Mathlib/Analysis/Calculus/Deriv/Prod.lean,Mathlib/Analysis/Calculus/Deriv/Shift.lean,Mathlib/Analysis/Calculus/Deriv/Slope.lean,Mathlib/Analysis/Calculus/Deriv/Star.lean,Mathlib/Analysis/Calculus/Deriv/Support.lean,Mathlib/Analysis/Calculus/Deriv/ZPow.lean,Mathlib/Analysis/Calculus/DiffContOnCl.lean,Mathlib/Analysis/Calculus/FDeriv/Add.lean,Mathlib/Analysis/Calculus/FDeriv/Analytic.lean,Mathlib/Analysis/Calculus/FDeriv/Basic.lean,Mathlib/Analysis/Calculus/FDeriv/Bilinear.lean,Mathlib/Analysis/Calculus/FDeriv/Comp.lean,Mathlib/Analysis/Calculus/FDeriv/Equiv.lean,Mathlib/Analysis/Calculus/FDeriv/Extend.lean,Mathlib/Analysis/Calculus/FDeriv/Linear.lean,Mathlib/Analysis/Calculus/FDeriv/Measurable.lean,Mathlib/Analysis/Calculus/FDeriv/Mul.lean,Mathlib/Analysis/Calculus/FDeriv/Norm.lean,Mathlib/Analysis/Calculus/FDeriv/Pi.lean,Mathlib/Analysis/Calculus/FDeriv/Prod.lean,Mathlib/Analysis/Calculus/FDeriv/RestrictScalars.lean,Mathlib/Analysis/Calculus/FDeriv/Star.lean,Mathlib/Analysis/Calculus/FDeriv/Symmetric.lean,Mathlib/Analysis/Calculus/FDeriv/WithLp.lean,Mathlib/Analysis/Calculus/FormalMultilinearSeries.lean 579 7 ['astrainfinita', 'github-actions', 'leanprover-bot', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
236-56971
7 months ago
unknown
0-0
0 seconds
27399 MoritzBeroRoos
author:MoritzBeroRoos
 chore: replace every usage of ⬝ᵥ (with old \cdot) by ·ᵥ (with \centerdot) Discussion at [zulip](https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/.5Ccdot.20!.3D.20.5Ccenterdot). Currently the abbreviations `\cdot` and `\centerdot` resolve to different, with the naked eye nearly undistinguishable symbols (despite the c in cdot surely standing for `center`..): - `\cdot` gives ⬝ [U+2B1D](https://www.compart.com/en/unicode/U+2B1D) "Black Very Small Square" - `\centerdot` gives · [U+00B7](https://www.compart.com/en/unicode/U+00B7) "Middle Dot" Mathlib mostly uses the `\centerdot` variant, except for the dotProduct notation and some probably unsuspecting people wanting \centerdot but getting \cdot in their comments and 6 uses of a notation using the raw `\cdot` without any subscript at `Mathlib\Topology\Homotopy\Product.lean`. This PR replaces the dot product `⬝ᵥ` with its `\centerdot` counterpart `·ᵥ`. The related PR [here](https://github.com/leanprover/vscode-lean4/pull/639) can then overwrite the `\cdot` abbreviation, to produce the same symbol as the `centerdot` abbreviation does. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict new-contributor 133/133 Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Combinatorics/Configuration.lean,Mathlib/Combinatorics/SimpleGraph/AdjMatrix.lean,Mathlib/Combinatorics/SimpleGraph/LapMatrix.lean,Mathlib/Data/Matrix/Block.lean,Mathlib/Data/Matrix/ConjTranspose.lean,Mathlib/Data/Matrix/Hadamard.lean,Mathlib/Data/Matrix/Mul.lean,Mathlib/Data/Matrix/Notation.lean,Mathlib/Data/Matrix/Reflection.lean,Mathlib/Data/Matrix/RowCol.lean,Mathlib/Data/Matrix/Vec.lean,Mathlib/LinearAlgebra/CrossProduct.lean,Mathlib/LinearAlgebra/Matrix/BilinearForm.lean,Mathlib/LinearAlgebra/Matrix/DotProduct.lean,Mathlib/LinearAlgebra/Matrix/Nondegenerate.lean,Mathlib/LinearAlgebra/Matrix/Orthogonal.lean,Mathlib/LinearAlgebra/Matrix/PosDef.lean,Mathlib/LinearAlgebra/Matrix/SchurComplement.lean,Mathlib/LinearAlgebra/Matrix/SesquilinearForm.lean,Mathlib/LinearAlgebra/Matrix/Trace.lean,Mathlib/LinearAlgebra/PerfectPairing/Matrix.lean,Mathlib/LinearAlgebra/Projectivization/Constructions.lean,Mathlib/Topology/Instances/Matrix.lean 25 6 ['MoritzBeroRoos', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant'] nobody
236-43582
7 months ago
259-57673
259 days ago
7-62439
7 days
27479 iu-isgood
author:iu-isgood
 feat: Abel's Binomial Theorem We have formalized Abel's Binomial Theorem as part of an REU project. There are a few remaining sorrys, but we will finish them soon. I will edit this PR message later according to community rules. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-data new-contributor 326/0 Mathlib/Data/Nat/Choose/AbelBinomial.lean 1 28 ['ElifUskuplu', 'FrankieNC', 'github-actions', 'iu-isgood'] nobody
236-43343
7 months ago
265-41040
265 days ago
0-237
3 minutes
28787 alreadydone
author:alreadydone
 feat(Counterexamples): a domain whose ring of differences is not a domain Example produced by Gemini 2.5 Pro: https://gemini.google.com/share/9558539e1309 --- - [ ] depends on: #28468 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra blocked-by-other-PR large-import
label:t-algebra$
 1200/204 Counterexamples.lean,Counterexamples/GrothendieckAddGroupIsDomain.lean,Mathlib.lean,Mathlib/Algebra/Group/Subsemigroup/Defs.lean,Mathlib/Algebra/Module/End.lean,Mathlib/Algebra/Module/LocalizedModule/IsLocalization.lean,Mathlib/Algebra/Order/Nonneg/Basic.lean,Mathlib/Algebra/Order/Nonneg/Ring.lean,Mathlib/Algebra/Ring/Invertible.lean,Mathlib/GroupTheory/MonoidLocalization/Archimedean.lean,Mathlib/GroupTheory/MonoidLocalization/Basic.lean,Mathlib/GroupTheory/MonoidLocalization/Lemmas.lean,Mathlib/GroupTheory/MonoidLocalization/MonoidWithZero.lean,Mathlib/LinearAlgebra/TensorProduct/Basic.lean,Mathlib/RingTheory/IsTensorProduct.lean,Mathlib/RingTheory/Localization/Additive.lean,Mathlib/RingTheory/Localization/Away/Basic.lean,Mathlib/RingTheory/Localization/Basic.lean,Mathlib/RingTheory/Localization/Defs.lean,Mathlib/RingTheory/Localization/Ideal.lean,Mathlib/RingTheory/Localization/StrongRankCondition.lean,Mathlib/RingTheory/Smooth/StandardSmooth.lean,Mathlib/RingTheory/Trace/Quotient.lean 23 6 ['alreadydone', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'riccardobrasca'] nobody
235-46793
7 months ago
235-52237
235 days ago
1-13263
1 day
24719 madvorak
author:madvorak
 feat(LinearAlgebra/Matrix/NonsingularInverse): inverting `Matrix` inverts its `LinearEquiv` --- Discussion: https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2324719.20cannot.20find.20home/with/517142655 awaiting-author t-algebra
label:t-algebra$
 10/0 Mathlib/LinearAlgebra/Matrix/NonsingularInverse.lean 1 16 ['eric-wieser', 'github-actions', 'madvorak', 'ocfnash'] nobody
233-68280
7 months ago
255-50257
255 days ago
85-42087
85 days
27437 kckennylau
author:kckennylau
 feat(RingTheory/Valuation): some lemmas about comparing with 1 and 0 and with each other *From the 2025 Local Class Field Theory Workshop.* --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-ring-theory 109/22 Mathlib/NumberTheory/Padics/ValuativeRel.lean,Mathlib/RingTheory/Valuation/Basic.lean,Mathlib/RingTheory/Valuation/Extension.lean,Mathlib/RingTheory/Valuation/ValuativeRel.lean 4 20 ['erdOne', 'github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot', 'matthewjasper', 'pechersky'] nobody
232-46163
7 months ago
252-10774
252 days ago
14-27544
14 days
28148 kckennylau
author:kckennylau
 feat(Matrix): Simproc and Rw-proc for Matrix Transpose Co-authored by Aaron Liu. ```lean example : !![1, 2, 3; 4, 5, 6]ᵀ = !![1, 4; 2, 5; 3, 6] := by rw [transpose_of% 2 3] example : !![1, 2, 3; 4, 5, 6]ᵀ = !![1, 4; 2, 5; 3, 6] := by rw [transpose_of] example : !![1, 2, 3; 4, 5, 6]ᵀ = !![1, 4; 2, 5; 3, 6] := by simp only [matrix_transpose] ``` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta 267/8 Mathlib.lean,Mathlib/Data/Matrix/Notation.lean,Mathlib/LinearAlgebra/UnitaryGroup.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Simproc/Matrix.lean,MathlibTest/Simproc/Matrix.lean,MathlibTest/matrix.lean,scripts/noshake.json 8 32 ['eric-wieser', 'github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot', 'plp127'] eric-wieser
assignee:eric-wieser
232-516
7 months ago
232-517
232 days ago
13-2028
13 days
28686 mitchell-horner
author:mitchell-horner
 feat(Combinatorics/SimpleGraph): prove the Erdős-Stone theorem Proves the Erdős-Stone theorem: If `G` has at least `(1 - 1 / r + o(1)) * card V ^ 2 / 2` many edges, then `G` contains a copy of a `completeEquipartiteGraph (r + 1) t`. --- - [ ] depends on: #28685 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP blocked-by-other-PR t-combinatorics 757/14 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Bipartite.lean,Mathlib/Combinatorics/SimpleGraph/CompleteMultipartite.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/ErdosStoneSimonovits.lean,Mathlib/Combinatorics/SimpleGraph/Finite.lean,Mathlib/Combinatorics/SimpleGraph/Maps.lean,Mathlib/Combinatorics/SimpleGraph/Operations.lean,Mathlib/Data/Finset/Union.lean,Mathlib/Data/Nat/Cast/Order/Field.lean 10 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
231-50356
7 months ago
239-67299
239 days ago
0-10
10 seconds
28687 mitchell-horner
author:mitchell-horner
 feat(Combinatorics/SimpleGraph): prove the Erdős-Stone-Simonovits theorem Proves the Erdős-Stone-Simonovits theorem: If the chromatic number of `H` equals `r + 1 > 0`, then the `extremalNumber` of `H` is greater than `(1 - 1 / r - o(1)) * card V ^ 2 / 2` and at most `(1 - 1 / r + o(1)) * card V ^ 2 / 2`. --- - [ ] depends on: #28686 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP blocked-by-other-PR t-combinatorics 879/14 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Bipartite.lean,Mathlib/Combinatorics/SimpleGraph/CompleteMultipartite.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/ErdosStoneSimonovits.lean,Mathlib/Combinatorics/SimpleGraph/Finite.lean,Mathlib/Combinatorics/SimpleGraph/Maps.lean,Mathlib/Combinatorics/SimpleGraph/Operations.lean,Mathlib/Data/Finset/Union.lean,Mathlib/Data/Nat/Cast/Order/Field.lean 10 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
231-50355
7 months ago
239-67072
239 days ago
0-74
1 minute
28689 mitchell-horner
author:mitchell-horner
 feat(Combinatorics/SimpleGraph): prove well-known corollaries of the Erdős-Stone-Simonovits theorem Proves well-known corollaries of the Erdős-Stone-Simonovits theorem: E.g., if the chromatic number of `H` equals `r + 1 > 1`, then `extremalNumber n H` is asymptotically equivalent to `(1 - 1 / r) * n.choose 2` as `n → ∞` --- - [ ] depends on: #28687 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP blocked-by-other-PR t-combinatorics 958/14 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Bipartite.lean,Mathlib/Combinatorics/SimpleGraph/CompleteMultipartite.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/ErdosStoneSimonovits.lean,Mathlib/Combinatorics/SimpleGraph/Finite.lean,Mathlib/Combinatorics/SimpleGraph/Maps.lean,Mathlib/Combinatorics/SimpleGraph/Operations.lean,Mathlib/Data/Finset/Union.lean,Mathlib/Data/Nat/Cast/Order/Field.lean 10 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
231-50354
7 months ago
239-66888
239 days ago
0-45
45 seconds
26952 robin-carlier
author:robin-carlier
 feat(CategoryTheory/DayConvolution): monoid objects internal to day convolutions In this file, given `F : C ⊛⥤ V`, we provide a bijective correspondence between lax monoidal structures on `F.functor` and `Mon_Class F` structures. We also prove that through this correspondance, monoidal natural transformations correspond to morphisms of internal monoid objects. --- - [ ] depends on: #26890 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-category-theory 1574/19 Mathlib.lean,Mathlib/CategoryTheory/Functor/KanExtension/Basic.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution/DayFunctor.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution/Mon_.lean 5 5 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
231-22565
7 months ago
281-17921
281 days ago
0-311
5 minutes
27133 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Monoidal/DayConvolution): `C ⊛⥤ V` is monoidal closed when `V` is When `V` is a monoidal closed category admitting enough limits, we show that the type alias `C ⊛⥤ V` for functors `C ⥤ V` with Day convolution monoidal structure is monoidal closed using the API for `LawfulDayConvolutionClosedMonoidalCategoryStruct` developped in #27119. We expose the required data to exhibit (realization as a functor of) the internal hom as a suitable, and we port the lemmas that characterize its functoriality in that regard, as well as the evaluation and coevaluation morphisms. --- - [ ] depends on: #27119 - [ ] depends on: #26890 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-category-theory 1706/20 Mathlib.lean,Mathlib/CategoryTheory/Functor/KanExtension/Basic.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution/Closed.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution/DayFunctor.lean 5 6 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
231-22440
7 months ago
276-48894
276 days ago
0-1192
19 minutes
27151 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Monoidal/DayConvolution): `C ⊛⥤ V` is braided/symmetric when `C` and `V` are braided/symmetric We use the machinery from #27150 to show that Day functors (the type alias for functors endowed with the Day convolution monoidal structure) are braided/symmetric when the base categories are. --- - [ ] depends on: #27150 - [ ] depends on: #26890 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-category-theory 1591/20 Mathlib.lean,Mathlib/CategoryTheory/Functor/KanExtension/Basic.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution/Braided.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution/DayFunctor.lean 5 5 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
231-22438
7 months ago
275-69387
275 days ago
0-1022
17 minutes
27175 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Monoidal/DayConvolution): `LawfulDayConvolutionMonoidalCategoryStruct.ι C V D` is monoidal when the target is `C ⊛⥤ V` We prove a "soundness" result for our notion of `LawfulDayConvolutionMonoidalCategoryStruct`, i.e that when be interpret its field `ι` as valued in Day functors (the type alias for functors endowed with the Day convolution monoidal structure), the data from `LawfulDayConvolutionMonoidalCategoryStruct` turn `ι` in a monoidal functor, proving that the categories endowed with such a structure are precisely those that can be identified to monoidal (not necessarily full) subcategories of Day functors. Implicitly, the structure isomorphisms for this monoidal structure bundle isomorphisms asserting unicity up to isomorphisms of day convolutions. --- - [ ] depends on: #26890 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-category-theory 1585/24 Mathlib.lean,Mathlib/CategoryTheory/Functor/KanExtension/Basic.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution/DayFunctor.lean 4 5 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
231-22437
7 months ago
275-36519
275 days ago
0-673
11 minutes
26097 adomani
author:adomani
 dev: the relative linter --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP awaiting-author t-linter 316/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/Local.lean,Mathlib/Util/ParseGit.lean 4 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
230-85612
7 months ago
unknown
0-0
0 seconds
25741 robin-carlier
author:robin-carlier
 feat(AlgebraicTopology/SimplexCategory/SimplicialObject): definitions of simplicial objects by generators and relation We leverage the equivalence between `SimplexCategory` and `SimplexCategoryGenRel` to give new constructors for (co)simplicial objects, as well as constructors for natural transformations (resp. isomorphism) between those. Final PR in the series of PR formalising the equivalence between `SimplexCategory` and `SimplexCategoryGenRel`. --- - [ ] depends on: #25740 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #21748.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/21748* t-algebraic-topology blocked-by-other-PR t-category-theory large-import merge-conflict 1363/9 Mathlib.lean,Mathlib/AlgebraicTopology/SimplexCategory/GeneratorsRelations/Equivalence.lean,Mathlib/AlgebraicTopology/SimplexCategory/GeneratorsRelations/NormalForms.lean,Mathlib/AlgebraicTopology/SimplicialObject/GeneratorsRelations.lean 4 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
227-62632
7 months ago
308-70767
308 days ago
0-829
13 minutes
26931 javra
author:javra
 feat(CategoryTheory/Enriched): `V`-enriched isomorphisms Defines isomorphisms in `V`-enriched categories and relate them to ordinary isomorphisms in the case of ordinary enriched categories. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory infinity-cosmos 211/14 Mathlib.lean,Mathlib/CategoryTheory/Enriched/Basic.lean,Mathlib/CategoryTheory/Enriched/Iso.lean,Mathlib/CategoryTheory/Enriched/Opposite.lean,Mathlib/CategoryTheory/Enriched/Ordinary/Basic.lean,Mathlib/CategoryTheory/Enriched/Ordinary/Iso.lean 6 21 ['emilyriehl', 'github-actions', 'javra', 'joelriou', 'mathlib4-merge-conflict-bot', 'mckoen'] nobody
227-62022
7 months ago
261-66269
261 days ago
19-75957
19 days
27707 FLDutchmann
author:FLDutchmann
 feat(NumberTheory/SelbergSieve): define Selberg's weights and prove basic results. This PR continues the work from #23635. Original PR: https://github.com/leanprover-community/mathlib4/pull/23635 - [ ] depends on: #27702 merge-conflict t-number-theory blocked-by-other-PR t-analysis 407/83 Mathlib/NumberTheory/Divisors.lean,Mathlib/NumberTheory/SelbergSieve.lean 2 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
227-29282
7 months ago
257-12961
257 days ago
1-28996
1 day
25208 erdOne
author:erdOne
 feat(LinearAlgebra): `tensor_induction` macro --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra RFC
label:t-algebra$
 87/116 Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Central/TensorProduct.lean,Mathlib/LinearAlgebra/DirectSum/Finsupp.lean,Mathlib/LinearAlgebra/TensorProduct/Basic.lean,Mathlib/RingTheory/Flat/Equalizer.lean,Mathlib/RingTheory/TensorProduct/Basic.lean,Mathlib/RingTheory/TensorProduct/Finite.lean,Mathlib/RingTheory/Unramified/Finite.lean 8 8 ['chrisflav', 'eric-wieser', 'github-actions', 'leanprover-bot', 'mathlib4-merge-conflict-bot'] nobody
226-83389
7 months ago
325-54836
325 days ago
0-600
10 minutes
28803 astrainfinita
author:astrainfinita
 refactor: unbundle algebra from `ENormed*` Further speed up the search in the algebraic typeclass hierarchy by avoiding searching for `TopologicalSpace`. This PR continues the work from #23961. - Change `ESeminormed(Add)Monoid` and `ENormed(Add)Monoid` so they no longer carry algebraic data. - Deprecate `ESeminormed(Add)CommMonoid` and `ENormed(Add)CommMonoid` in favor of `ESeminormed(Add)Monoid` and `ENormed(Add)Monoid` with a commutative algebraic typeclass. |Old|New| |---|---| | `[ESeminormed(Add)(Comm)Monoid E]` | `[(Add)(Comm)Monoid E] [ESeminormed(Add)Monoid E]` | | `[ENormed(Add)(Comm)Monoid]` | `[(Add)(Comm)Monoid E] [ENormed(Add)Monoid]` | See [Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2328803.20refactor.3A.20unbundle.20algebra.20from.20.60ENormed*.60/with/536024350) ------------ - [x] depends on: #28813 t-algebra merge-conflict slow-typeclass-synthesis awaiting-zulip t-analysis
label:t-algebra$
 80/63 Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Analysis/Normed/Group/Continuity.lean,Mathlib/Analysis/Normed/Group/InfiniteSum.lean,Mathlib/Analysis/NormedSpace/IndicatorFunction.lean,Mathlib/MeasureTheory/Function/L1Space/AEEqFun.lean,Mathlib/MeasureTheory/Function/L1Space/HasFiniteIntegral.lean,Mathlib/MeasureTheory/Function/L1Space/Integrable.lean,Mathlib/MeasureTheory/Function/LocallyIntegrable.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Function/LpSeminorm/CompareExp.lean,Mathlib/MeasureTheory/Function/LpSeminorm/TriangleInequality.lean,Mathlib/MeasureTheory/Integral/IntegrableOn.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/Basic.lean 14 28 ['astrainfinita', 'bryangingechen', 'github-actions', 'grunweg', 'kbuzzard', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'mathlib-bors', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'sgouezel'] grunweg
assignee:grunweg
226-14517
7 months ago
234-52071
234 days ago
0-19882
5 hours
26935 Paul-Lez
author:Paul-Lez
 feat(Analysis/SpecialFunction/NthRoot): definition and basic API of Real.nthRoot This PR continues the work from #25364. Original PR: https://github.com/leanprover-community/mathlib4/pull/25364 Co-authored-by: Eric Wieser t-analysis 311/0 Mathlib/Analysis/SpecialFunctions/NthRoot.lean 1 10 ['Paul-Lez', 'eric-wieser', 'github-actions', 'mo271', 'smmercuri', 'yury-harmonic'] nobody
225-16627
7 months ago
280-63121
280 days ago
0-75052
20 hours
27995 kckennylau
author:kckennylau
 feat(RingTheory/Valuation): alternate constructors for Valuation --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory awaiting-CI 82/0 Mathlib/Algebra/GroupWithZero/WithZero.lean,Mathlib/FieldTheory/RatFunc/Degree.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/RingTheory/Valuation/Basic.lean 4 22 ['YaelDillies', 'github-actions', 'grunweg', 'kckennylau', 'pechersky'] nobody
223-74902
7 months ago
224-48151
224 days ago
17-74458
17 days
26159 upobir
author:upobir
 feat(Algebra/QuadraticDiscriminant): Adding inequalities on quadratic from inequalities on discriminant This PR continues the work from #24517. Original PR: https://github.com/leanprover-community/mathlib4/pull/24517 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-algebra
label:t-algebra$
 34/0 Mathlib/Algebra/QuadraticDiscriminant.lean 1 8 ['chrisflav', 'github-actions', 'tb65536', 'upobir'] chrisflav
assignee:chrisflav
222-47806
7 months ago
246-39334
246 days ago
55-10605
55 days
26908 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Monoidal/DayConvolution): alternative ext principle for unitors Currently, our infrastructure for left/right unitors for Day convolution of functors `C ⥤ V` do not have satisfactory extensionality principle: the current way to characterize morphisms out of `U ⊛ F` is the default extensionality principle for Day convolution, which characterizes first such functors via functors out of `U ⊠ F`. Left unitors are then obtained using the fact `U ⊠ F` is a left Kan extension of a functor from `PUnit × C` (which is equivalent to `C`) but we did not record on its own this principle. Using the transitivity of left Kan extensions proved in #26899, we directly exhibit `U ⊛ F` as a left Kan extension of `F ⋙ tensorLeft (𝟙_ V)` along `tensorLeft (𝟙_ C)`. The unit of this Kan extension is composed exactly of the morphisms that appear in the [characterization of left unitors](https://leanprover-community.github.io/mathlib4_docs/Mathlib/CategoryTheory/Monoidal/DayConvolution.html#CategoryTheory.MonoidalCategory.DayConvolutionUnit.leftUnitor_hom_unit_app). We also slightly generalize the instances that express that external products with unitors are left Kan extensions, so that they can be used when taking external products with more complicated functors than currently. This is again useful when chaining extensionality lemmas for morphisms out of terms of the form `(F ⊛ U) ⊛ G`. We prove a similar thing for right unitors With this, it should be possible to have a much more satisfactory way of working with Day convolutions: this allows to "elimiinate" units without ending up with terms in an external product. --- - [ ] depends on: #26899 - [ ] depends on: #26906 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory 307/18 Mathlib/CategoryTheory/Functor/KanExtension/Basic.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution.lean 2 4 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
220-46862
7 months ago
220-46863
220 days ago
0-1812
30 minutes
27150 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Monoidal/DayConvolution): constructors for braided and symmetric structure on day convolutions monoidal categories Following the pattern in #27119, we give API to construct `BraidedCategory` and `SymmetricCategory` structures on a monoidal category equipped with a `LawfulDayConvolutionMonoidalCategoryStruct`. To achieve this, we introduce an other type class `LawfulDayConvolutionBraidedCategoryStruct` that bundles an associator isomorphism that behaves like the one constructed for functors in #27067. We provide a noncomputable constructor for this typeclass that takes as input fullness of the "realization" functor to a category of functors, and we show that the typeclasses are sufficient to define the desired structures. --- - [x] depends on: #27067 - [x] depends on: #26820 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory 826/9 Mathlib/CategoryTheory/Monoidal/DayConvolution.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution/Braided.lean 2 5 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
220-41901
7 months ago
275-71596
275 days ago
0-1002
16 minutes
26462 PSchwahn
author:PSchwahn
 feat(LinearAlgebra/Projection): add results about inverse of `Submodule.prodEquivOfIsCompl` Add two theorems `Submodule.prodEquivOfIsCompl_symm_apply` and `Submodule.prodEquivOfIsCompl_symm_add`, which are API for `Submodule.prodEquivOfIsCompl`. We believe these theorems are useful; for example, we have used their statements in a [classification formalization project](https://github.com/LieLean/LowDimSolvClassification). Co-authored by: - [Viviana del Barco](https://github.com/vdelbarc) - [Gustavo Infanti](https://github.com/GuQOliveira) - [Exequiel Rivas](https://github.com/erivas) --- I am not sure whether the `prodEquivOfIsCompl_symm_apply` theorem should be tagged with `@[simp]`; this might lead to confluence issues. Opinions are welcome! [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-algebra new-contributor
label:t-algebra$
 10/0 Mathlib/LinearAlgebra/Projection.lean 1 7 ['PSchwahn', 'github-actions', 'joelriou', 'kckennylau'] joelriou
assignee:joelriou
220-14711
7 months ago
220-45814
220 days ago
73-43082
73 days
27119 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Monoidal/DayConvolution): constructors for closed monoidal day convolution monoidal structures Following the pattern introduced in #26798 and #26820 and using results of #26879, we introduce a typeclass `LawfulDayConvolutionClosedMonoidalCategoryStruct` that encodes the data needed on a `LawfulDayConvolutionMonoidalCategoryStruct` to define well-behaved internal homs. We give a constructor assuming existence of relevant ends, and prove that this data defines a `MonoidalClosed` instance on the monoidal category structures one can deduce from `LawfulDayConvolutionMonoidalCategoryStruct`. --- - [x] depends on: #27079 - [x] depends on: #27091 - [x] depends on: #26879 - [x] depends on: #26820 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory 900/9 Mathlib/CategoryTheory/Monoidal/DayConvolution.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution/Closed.lean 2 6 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
219-55752
7 months ago
276-77064
276 days ago
0-1
1 second
28623 gilesgshaw
author:gilesgshaw
 feat(Logic/Basic): minor additions and simplification of proofs Add new theorems and simplify proofs. Specifically, we add the family of related theorems `apply_dite_iff_exists`, `apply_dite_iff_forall`, `apply_ite_iff_and` and `apply_ite_iff_or`. For each other 'family' of theorems in the file that is analogous to the above, we do the following - Simplify proofs where possible, e.g. by appealing to the new theorems - Complete the family, if any of the corresponding four are missing - Rename to ensure consistency with the above pattern --- merge-conflict t-logic new-contributor 83/55 Archive/Examples/IfNormalization/Result.lean,Archive/Examples/IfNormalization/WithoutAesop.lean,Mathlib/Algebra/ContinuedFractions/Computation/Translations.lean,Mathlib/Algebra/MvPolynomial/Variables.lean,Mathlib/Algebra/Notation/Indicator.lean,Mathlib/LinearAlgebra/Matrix/Rank.lean,Mathlib/Logic/Basic.lean,Mathlib/MeasureTheory/Measure/WithDensity.lean,Mathlib/SetTheory/Ordinal/Notation.lean 9 12 ['eric-wieser', 'gilesgshaw', 'github-actions', 'mathlib4-merge-conflict-bot', 'plp127'] awainverse
assignee:awainverse
219-49613
7 months ago
219-49614
219 days ago
10-61840
10 days
28804 grunweg
author:grunweg
 feat: a few more tactic linters All analysis passes in this list have been suggested [on zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Tactic.20analysis.20framework/with/535766713). --- Untested, so may not work yet. - [ ] depends on: #28802 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-meta 204/26 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/TacticAnalysis/Declarations.lean,Mathlib/Tactic/TacticAnalysis/FunProp.lean,Mathlib/Tactic/TacticAnalysis/Misc.lean,MathlibTest/TacticAnalysis2.lean 6 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
218-69177
7 months ago
236-56114
236 days ago
0-601
10 minutes
13036 joelriou
author:joelriou
 feat(CategoryTheory/Sites): under certain conditions, cover preserving functors preserve 1-hypercovers Previously, in order to show that a functor between Grothendieck sites was continuous, it was necessary to show that it was "cover preserving" and "compatible preserving". There were two lemmas which could be used in order to show that a functor was "compatible preserving". Since #13012, the better condition of "1-hypercover preserving" functor was introduced and it implies that the functor is continuous. In this PR, under the same assumptions as in the two lemmas mentionned above, we show that cover preserving functors are 1-hypercover preserving functors. This gives slightly better criteria in order to show that a functor is continuous. --- - [x] depends on: #13004 - [x] depends on: #13011 - [x] depends on: #13012 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-category-theory 94/7 Mathlib/CategoryTheory/Sites/Continuous.lean,Mathlib/CategoryTheory/Sites/CoverPreserving.lean,Mathlib/CategoryTheory/Sites/Over.lean,Mathlib/CategoryTheory/Sites/Sieves.lean 4 3 ['github-actions', 'leanprover-community-mathlib4-bot', 'mathlib4-merge-conflict-bot'] nobody
218-18937
7 months ago
697-57869
697 days ago
0-1
1 second
29527 kim-em
author:kim-em
 feat: script for checking Github URLs This adds scripts/check_github_urls.py, which checks for links for closed github issues/prs, and shows the context at the link. Of course, many links are to closed pull requests because the discussion there provides useful context. Not sure how to best filter results. WIP CI 475/0 scripts/README.md,scripts/check_github_urls.py 2 2 ['github-actions', 'kim-em'] nobody
218-8090
7 months ago
218-8835
218 days ago
0-1
1 second
27335 eric-wieser
author:eric-wieser
 chore(Data/List): use simp-normal-form for boolean equalities This replaces `¬(p x = true)` with `p x = false`. It also makes explicit some adjacent `h : p x` spellings for symmetry, but the `= true`s were already implied by the coercion. Zulip: [#lean4 > `h : ¬(b = true)` vs `h : b = false` @ 💬](https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/.60h.20.3A.20.C2.AC.28b.20.3D.20true.29.60.20vs.20.60h.20.3A.20b.20.3D.20false.60/near/529976237) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 38/32 Mathlib/Data/List/DropRight.lean,Mathlib/Data/List/SplitOn.lean,Mathlib/Data/List/TakeWhile.lean 3 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] nobody
218-2579
7 months ago
222-11537
222 days ago
0-22091
6 hours
25778 thefundamentaltheor3m
author:thefundamentaltheor3m
 feat: Monotonicity of `setIntegral` for nonnegative functions This PR makes it easier to prove monotonicity of the Bochner integral on sets for nonnegative functions by removing the stronger assumption required by the general monotonicity lemma that both of the functions being compared must be integrable. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-measure-probability new-contributor 8/0 Mathlib/MeasureTheory/Integral/Bochner/Set.lean 1 6 ['RemyDegenne', 'github-actions', 'sgouezel', 'thefundamentaltheor3m'] nobody
217-45335
7 months ago
308-53173
308 days ago
0-11893
3 hours
29484 eric-wieser
author:eric-wieser
 refactor: switch to [] notation for Stream' I'll continue fixing this only if people agree this is a good use of this notation. [#mathlib4 > Changing `Stream.Seq` to use `GetElem` @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Changing.20.60Stream.2ESeq.60.20to.20use.20.60GetElem.60/near/538548680) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data large-import 195/173 Mathlib/Algebra/ContinuedFractions/Basic.lean,Mathlib/Algebra/ContinuedFractions/Computation/Basic.lean,Mathlib/Algebra/ContinuedFractions/Translations.lean,Mathlib/Combinatorics/Hindman.lean,Mathlib/Control/Fix.lean,Mathlib/Control/LawfulFix.lean,Mathlib/Data/Seq/Computation.lean,Mathlib/Data/Seq/Defs.lean,Mathlib/Data/Stream/Defs.lean,Mathlib/Data/Stream/Init.lean,Mathlib/Data/WSeq/Basic.lean,Mathlib/Data/WSeq/Productive.lean 12 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
217-17598
7 months ago
unknown
0-0
0 seconds
22517 j-loreaux
author:j-loreaux
 feat: `ℕ+` powers in semigroups --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP large-import 275/28 Mathlib.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Ext.lean,Mathlib/Algebra/Group/PNatPowAssoc.lean,Mathlib/Algebra/Group/PPow.lean,Mathlib/Algebra/Group/TypeTags/Basic.lean,Mathlib/Algebra/Ring/Ext.lean,Mathlib/Algebra/Ring/ULift.lean,Mathlib/Data/Num/Lemmas.lean,Mathlib/Data/Real/Basic.lean,Mathlib/Data/ZMod/Defs.lean,Mathlib/LinearAlgebra/LinearPMap.lean,Mathlib/NumberTheory/Dioph.lean,Mathlib/Tactic/ToAdditive/Frontend.lean 14 6 ['eric-wieser', 'github-actions', 'j-loreaux', 'leanprover-bot', 'mattrobball'] nobody
216-22920
7 months ago
409-24501
409 days ago
0-27
27 seconds
27933 grunweg
author:grunweg
 chore(OrdNode): format code example in code blocks Wrap them in code blocks (and unindent them; that indentation is not needed any more). This also avoids warnings from the linter in #27898. ------- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 459/212 Mathlib/Data/Ordmap/Ordnode.lean 1 4 ['eric-wieser', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] nobody
216-246
7 months ago
216-247
216 days ago
39-69478
39 days
25069 erdOne
author:erdOne
 feat(EllipticCurve): rational points of singular nodal cubics --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebraic-geometry 251/0 Mathlib.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Singular/Node.lean 3 14 ['Multramate', 'acmepjz', 'chrisflav', 'erdOne', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] chrisflav
assignee:chrisflav
214-38121
7 months ago
230-69930
230 days ago
100-20975
100 days
25070 erdOne
author:erdOne
 feat(EllipticCurve): rational points on singular cuspidal cubics --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebraic-geometry 123/0 Mathlib.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Singular/Cusp.lean 2 12 ['Multramate', 'acmepjz', 'adamtopaz', 'erdOne', 'github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot'] adamtopaz
assignee:adamtopaz
214-38120
7 months ago
240-39084
240 days ago
90-52970
90 days
26670 yu-yama
author:yu-yama
 feat(GroupExtension/Abelian): define `conjClassesEquivH1` This PR continues the work from #21837. Original PR: https://github.com/leanprover-community/mathlib4/pull/21837 merge-conflict awaiting-author t-algebra
label:t-algebra$
 162/5 Mathlib.lean,Mathlib/GroupTheory/GroupExtension/Abelian.lean,Mathlib/GroupTheory/GroupExtension/Basic.lean,Mathlib/GroupTheory/GroupExtension/Defs.lean,docs/references.bib 5 3 ['erdOne', 'github-actions', 'mathlib4-merge-conflict-bot', 'yu-yama'] erdOne
assignee:erdOne
213-66414
7 months ago
238-29792
238 days ago
49-15167
49 days
26154 ADedecker
author:ADedecker
 refactor: add refactored APIs for algebraic filter bases This PR continues the work from #18437. Original PR: https://github.com/leanprover-community/mathlib4/pull/18437 merge-conflict t-topology 651/0 Mathlib.lean,Mathlib/Topology/Algebra/FilterBasis.lean,Mathlib/Topology/Algebra/FilterBasisNew.lean,Mathlib/Topology/Algebra/Nonarchimedean/Bases.lean,Mathlib/Topology/Algebra/Nonarchimedean/BasesNew.lean 5 3 ['ADedecker', 'github-actions', 'mathlib4-merge-conflict-bot'] PatrickMassot
assignee:PatrickMassot
213-61857
7 months ago
213-61858
213 days ago
87-79752
87 days
27024 grunweg
author:grunweg
 feat: Gram-Schmidt orthonormalisation for sections of a vector bundle Add a parametrised version of Gram-Schmidt, for sections of a topological vector bundle with a bundle metric. This will be used to define orthonormal local frames. From the path towards geodesics and the Levi-Civita connection. Co-authored-by: Patrick Massot --- - [x] depends on: #27023 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-differential-geometry 279/11 Mathlib.lean,Mathlib/Analysis/InnerProductSpace/GramSchmidtOrtho.lean,Mathlib/Topology/VectorBundle/GramSchmidtOrtho.lean,scripts/noshake.json 4 71 ['faenuccio', 'github-actions', 'grunweg', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'sgouezel'] sgouezel
assignee:sgouezel
213-52514
7 months ago
245-38644
245 days ago
28-14094
28 days
28580 kmill
author:kmill
 refactor: simplify implementation of `filter_upwards` This PR makes a few changes to `filter_upwards`: - it uses `focus`, which prevents multiGoalLinter from ever blaming the tactics used inside its implementation - it constructs the whole proof syntax and elaborates it at once using `evalTactic` and `refine`, rather than using the lower-level TermElab API, which can lose track of goals - it's written in a way that doesn't require goals to be in some particular order This was motivated by some multiGoalLinter issues I ran into when working on https://github.com/leanprover/lean4/pull/9942 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-order t-meta 14/16 Mathlib/Order/Filter/Defs.lean 1 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
213-50473
7 months ago
241-83149
241 days ago
0-1522
25 minutes
29010 grunweg
author:grunweg
 chore: more tests for field_simp features and edge cases --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 135/0 MathlibTest/FieldSimp.lean 1 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
212-28317
7 months ago
212-27775
212 days ago
0-71078
19 hours
27937 madvorak
author:madvorak
 feat(Logic/Basic): `congr_heq₂` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-logic 6/0 Mathlib/Logic/Basic.lean 1 8 ['YaelDillies', 'fpvandoorn', 'github-actions', 'madvorak', 'vihdzp'] fpvandoorn
assignee:fpvandoorn
211-65050
6 months ago
237-65835
237 days ago
17-62721
17 days
29741 JovanGerb
author:JovanGerb
 trying #28803 using lean#10178 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 1111/718 .github/actionlint.yml,.github/workflows/nightly-docgen.yml,.github/workflows/nightly_detect_failure.yml,.github/workflows/report-grind-regressions.yml,Cache/Requests.lean,Mathlib.lean,Mathlib/Algebra/Field/Rat.lean,Mathlib/Algebra/Homology/ExactSequence.lean,Mathlib/Algebra/Order/Ring/Rat.lean,Mathlib/Algebra/Order/Ring/Unbundled/Rat.lean,Mathlib/Algebra/Polynomial/Bivariate.lean,Mathlib/Algebra/Polynomial/Eval/Defs.lean,Mathlib/Algebra/Polynomial/Eval/SMul.lean,Mathlib/Algebra/Ring/Rat.lean,Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Instances.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Analysis/Normed/Group/Continuity.lean,Mathlib/Analysis/SpecialFunctions/Log/Summable.lean,Mathlib/CategoryTheory/Monoidal/Braided/Basic.lean,Mathlib/Computability/TMToPartrec.lean,Mathlib/Data/DFinsupp/Notation.lean,Mathlib/Data/FP/Basic.lean,Mathlib/Data/Finsupp/Notation.lean,Mathlib/Data/Int/Bitwise.lean,Mathlib/Data/Int/GCD.lean,Mathlib/Data/NNRat/Defs.lean,Mathlib/Data/Nat/GCD/Basic.lean,Mathlib/Data/Nat/GCD/BigOperators.lean,Mathlib/Data/Nat/PartENat.lean,Mathlib/Data/Nat/Prime/Defs.lean,Mathlib/Data/Rat/Cast/Defs.lean,Mathlib/Data/Rat/Defs.lean,Mathlib/Data/Rat/Floor.lean,Mathlib/Data/Rat/Lemmas.lean,Mathlib/Data/Seq/Basic.lean,Mathlib/Data/UInt.lean,Mathlib/Dynamics/PeriodicPts/Defs.lean,Mathlib/GroupTheory/Perm/Centralizer.lean,Mathlib/Init.lean,Mathlib/Lean/Expr/Rat.lean,Mathlib/Lean/Meta/CongrTheorems.lean,Mathlib/LinearAlgebra/PID.lean,Mathlib/LinearAlgebra/Quotient/Basic.lean,Mathlib/LinearAlgebra/Vandermonde.lean,Mathlib/Logic/Equiv/Prod.lean,Mathlib/NumberTheory/Ostrowski.lean,Mathlib/NumberTheory/Padics/PadicVal/Basic.lean,Mathlib/Order/Defs/LinearOrder.lean,Mathlib/Order/Defs/PartialOrder.lean,Mathlib/Order/Disjoint.lean,Mathlib/Order/Filter/Defs.lean,Mathlib/Probability/Distributions/Pareto.lean,Mathlib/RingTheory/Multiplicity.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CategoryTheory/Reassoc.lean,Mathlib/Tactic/CategoryTheory/Refs.lean,Mathlib/Tactic/DeriveFintype.lean,Mathlib/Tactic/FieldSimp.lean,Mathlib/Tactic/Hint.lean,Mathlib/Tactic/Linarith/Oracle/SimplexAlgorithm/Datatypes.lean,Mathlib/Tactic/Linter/DeprecatedModule.lean,Mathlib/Tactic/Linter/Header.lean,Mathlib/Tactic/Linter/Lint.lean,Mathlib/Tactic/Linter/Style.lean,Mathlib/Tactic/NormNum/GCD.lean,Mathlib/Tactic/StacksAttribute.lean,Mathlib/Tactic/SuppressCompilation.lean,Mathlib/Tactic/ToAdditive/Frontend.lean,Mathlib/Tactic/WLOG.lean,Mathlib/Testing/Plausible/Sampleable.lean,Mathlib/Util/Notation3.lean,Mathlib/Util/ParseCommand.lean,Mathlib/Util/Superscript.lean,MathlibTest/AssertExists.lean,MathlibTest/CalcQuestionMark.lean,MathlibTest/Change.lean,MathlibTest/DeprecateTo.lean,MathlibTest/FieldSimp.lean,MathlibTest/FindSyntax.lean,MathlibTest/LibrarySearch/basic.lean,MathlibTest/LibrarySearch/mathlib.lean,MathlibTest/LibrarySearch/observe.lean,MathlibTest/MinImports.lean,MathlibTest/RewriteSearch/Basic.lean,MathlibTest/RewriteSearch/Polynomial.lean,MathlibTest/StacksAttribute.lean,MathlibTest/Subsingleton.lean,MathlibTest/Use.lean,MathlibTest/Variable.lean,MathlibTest/hint.lean,MathlibTest/lift.lean,MathlibTest/linarith.lean,MathlibTest/notation3.lean,MathlibTest/propose.lean,MathlibTest/renameBvar.lean,MathlibTest/rewrites.lean,MathlibTest/ring.lean,MathlibTest/says.lean,MathlibTest/success_if_fail_with_msg.lean 105 2 ['JovanGerb', 'leanprover-bot'] nobody
211-60659
6 months ago
211-67765
211 days ago
0-15
15 seconds
7125 eric-wieser
author:eric-wieser
 feat: additive monoid structure via biproducts I suspect I'm missing a trick with these transport lemmas. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-category-theory awaiting-CI 237/0 Mathlib/CategoryTheory/Limits/Skeleton.lean 1 3 ['alreadydone', 'eric-wieser', 'mathlib4-merge-conflict-bot'] nobody
211-23578
6 months ago
unknown
0-0
0 seconds
27950 alreadydone
author:alreadydone
 feat(MonoidAlgebra): criteria for `single` to be a unit, irreducible or prime --- - [ ] depends on: #27936 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra blocked-by-other-PR
label:t-algebra$
 714/192 Mathlib.lean,Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean,Mathlib/Algebra/BigOperators/Group/Finset/Defs.lean,Mathlib/Algebra/BigOperators/Group/Finset/Piecewise.lean,Mathlib/Algebra/BigOperators/Group/List/Lemmas.lean,Mathlib/Algebra/BigOperators/Group/Multiset/Basic.lean,Mathlib/Algebra/Divisibility/Basic.lean,Mathlib/Algebra/Divisibility/Finite.lean,Mathlib/Algebra/Divisibility/Hom.lean,Mathlib/Algebra/Divisibility/Prod.lean,Mathlib/Algebra/Divisibility/Units.lean,Mathlib/Algebra/Group/Action/Pointwise/Finset.lean,Mathlib/Algebra/Group/Irreducible/Lemmas.lean,Mathlib/Algebra/Group/Prod.lean,Mathlib/Algebra/GroupWithZero/Associated.lean,Mathlib/Algebra/MonoidAlgebra/Divisibility.lean,Mathlib/Algebra/MonoidAlgebra/NoZeroDivisors.lean,Mathlib/Algebra/Notation/Defs.lean,Mathlib/Algebra/Prime/Defs.lean,Mathlib/Algebra/Prime/Lemmas.lean,Mathlib/Algebra/Prime/Prod.lean,Mathlib/Data/Nat/Init.lean,Mathlib/Dynamics/PeriodicPts/Defs.lean,Mathlib/GroupTheory/Coset/Card.lean,Mathlib/GroupTheory/Exponent.lean,Mathlib/GroupTheory/GroupAction/Blocks.lean,Mathlib/GroupTheory/GroupAction/Period.lean,Mathlib/GroupTheory/Index.lean,Mathlib/GroupTheory/OrderOfElement.lean,Mathlib/GroupTheory/Perm/Cycle/Type.lean,Mathlib/GroupTheory/Schreier.lean,Mathlib/GroupTheory/SpecificGroups/Cyclic.lean,Mathlib/Tactic/ToAdditive/Frontend.lean 33 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
210-54642
6 months ago
255-26279
255 days ago
0-53
53 seconds
28067 grunweg
author:grunweg
 Docstring enumerations Tracking PR; to be split. Audit all ocurrences of `^ \S`; exhaustive. --- - [x] depends on: #28068 - [x] depends on: #28069 - [ ] depends on: #28070 - [x] depends on: #28118 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR 264/263 Archive/Wiedijk100Theorems/SumOfPrimeReciprocalsDiverges.lean,Mathlib/Algebra/Algebra/Defs.lean,Mathlib/Algebra/BrauerGroup/Defs.lean,Mathlib/Algebra/Module/LinearMap/Polynomial.lean,Mathlib/CategoryTheory/Abelian/NonPreadditive.lean,Mathlib/CategoryTheory/EqToHom.lean,Mathlib/CategoryTheory/Filtered/Basic.lean,Mathlib/CategoryTheory/Limits/Final.lean,Mathlib/CategoryTheory/Limits/Pi.lean,Mathlib/CategoryTheory/Monoidal/Center.lean,Mathlib/CategoryTheory/Sites/Grothendieck.lean,Mathlib/CategoryTheory/Sites/Pretopology.lean,Mathlib/Condensed/Discrete/Characterization.lean,Mathlib/FieldTheory/ChevalleyWarning.lean,Mathlib/GroupTheory/MonoidLocalization/Basic.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Basic.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/RootSystem/GeckConstruction/Basic.lean,Mathlib/MeasureTheory/Integral/Bochner/Basic.lean,Mathlib/MeasureTheory/Measure/MeasureSpace.lean,Mathlib/MeasureTheory/Measure/MeasureSpaceDef.lean,Mathlib/MeasureTheory/OuterMeasure/Basic.lean,Mathlib/MeasureTheory/OuterMeasure/Defs.lean,Mathlib/NumberTheory/FLT/Basic.lean,Mathlib/NumberTheory/LSeries/PrimesInAP.lean,Mathlib/RingTheory/Grassmannian.lean,Mathlib/RingTheory/Localization/Basic.lean,Mathlib/RingTheory/Localization/Defs.lean,Mathlib/RingTheory/WittVector/Teichmuller.lean,Mathlib/Tactic/Bound.lean,Mathlib/Tactic/Bound/Attribute.lean,Mathlib/Tactic/ENatToNat.lean,Mathlib/Tactic/FBinop.lean,Mathlib/Tactic/IntervalCases.lean,Mathlib/Tactic/TermCongr.lean,Mathlib/Util/Notation3.lean,Mathlib/Util/Superscript.lean,docs/Conv/Guide.lean 38 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
208-56777
6 months ago
252-70840
252 days ago
0-2498
41 minutes
28908 joelriou
author:joelriou
 feat(CategoryTheory): Pullback functors on `Over` categories in `Type` have right adjoints Given a map `f : E → B`, in order to show that `Over.pullback f : Over B ⥤ Over E` commutes with colimits, we show that it admits a right adjoint. In order to do that, we first construct a functor `overPullback f : Over B ⥤ Over E` whose definition involves explicit types rather than categorical pullbacks, and we define its right adjoint `overPushforward f : Over E ⥤ Over B`. (In a future PR, it will be shown that the `Over.pullback` also commutes with colimits in categories of presheaves, and hopefully this will be used in the construction of the Quillen model category structure on simplicial sets.) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory 103/0 Mathlib.lean,Mathlib/CategoryTheory/Limits/Types/OverPullback.lean,Mathlib/CategoryTheory/Limits/Types/Shapes.lean 3 10 ['emilyriehl', 'github-actions', 'joelriou', 'mathlib4-merge-conflict-bot', 'robin-carlier', 'sinhp'] nobody
206-33143
6 months ago
220-53315
220 days ago
13-55255
13 days
29330 plp127
author:plp127
 chore: define `Fin.cycleIcc` with conditions Redefine `Fin.cycleIcc` using conditionals instead of composing existing `Fin` operations together. Its worst-case runtime drops from O(n) to O(1). As a bonus, the definition no longer needs explaining. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-group-theory 61/68 Mathlib/GroupTheory/Perm/Fin.lean 1 10 ['JovanGerb', 'eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot', 'plp127', 'tb65536'] nobody
204-73454
6 months ago
204-73455
204 days ago
19-81030
19 days
29588 Periecle
author:Periecle
 feat(Analysis/Complex/Residue): Implement residue theory for complex functions at isolated singularities # Add basic residue theory for complex functions This PR introduces the residue theory implementation in mathlib. ## Main additions - **`HasIsolatedSingularityAt f c`**: Predicate for functions with isolated singularities at point `c` - **`residue f c hf`**: The residue of `f` at isolated singularity `c`, defined via circle integrals - **Radius independence**: `residue_eq_two_pi_I_inv_smul_circleIntegral` - residue equals normalized circle integral for any valid radius - **Holomorphic residues**: `residue_of_holomorphic` - functions holomorphic in a neighborhood have zero residue - **Simple pole formula**: `residue_simple_pole` - for `f(z) = (z-c)⁻¹ * g(z)`, residue equals `g(c)` ## Implementation notes - Builds on existing circle integral infrastructure in `CauchyIntegral.lean` - Uses `Classical.choose` to extract witness radius from isolated singularity condition - Comprehensive documentation with mathematical context and examples - Establishes foundation for residue theorem, argument principle, and other applications ## Examples included - `residue(1/z, 0) = 1` (canonical simple pole) - Radius independence demonstration - Zero residues for holomorphic functions This provides the essential building blocks for complex analysis and first step to formalize residue theory. awaiting-author t-analysis new-contributor 383/0 Mathlib/Analysis/Complex/Residue/Basic.lean 1 17 ['Periecle', 'github-actions', 'hrmacbeth', 'llllvvuu', 'loefflerd'] nobody
204-48813
6 months ago
216-53176
216 days ago
0-1498
24 minutes
29482 mattrobball
author:mattrobball
 refactor (Algebra.Group.Defs): add npow/zpow/nsmul/zsmul as fields of new parents classes Adds ZPow G class and makes this a parent to DivInvMonoid and the corresponding additive versions. Updates zpow/zsmul operations to use the integrated power/scalar multiplication syntax. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 177/122 Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/Group/Basic.lean,Mathlib/Algebra/Group/Commute/Defs.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Ext.lean,Mathlib/Algebra/Group/Int/Defs.lean,Mathlib/Algebra/Group/Opposite.lean,Mathlib/Algebra/Group/Pointwise/Set/Basic.lean,Mathlib/Algebra/Group/Prod.lean,Mathlib/Algebra/Group/Submonoid/Membership.lean,Mathlib/Algebra/Group/TypeTags/Basic.lean,Mathlib/Algebra/Group/Units/Defs.lean,Mathlib/Algebra/GroupWithZero/Basic.lean,Mathlib/Algebra/Module/NatInt.lean,Mathlib/Algebra/Order/GroupWithZero/Unbundled/Basic.lean,Mathlib/Algebra/Order/Monoid/Unbundled/WithTop.lean,Mathlib/Algebra/Order/Ring/Unbundled/Basic.lean,Mathlib/Algebra/Ring/ULift.lean,Mathlib/Data/BitVec.lean,Mathlib/Tactic/Abel.lean,Mathlib/Tactic/NormNum/Pow.lean 21 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
203-83712
6 months ago
219-23751
219 days ago
0-160
2 minutes
29657 jcreinhold
author:jcreinhold
 feat(CategoryTheory/MarkovCategory): add Markov categories This PR adds Markov categories to the category theory library. A Markov category is a symmetric monoidal category where every object has canonical copy and delete morphisms that form commutative comonoids. ## What this gives mathlib In a Markov category, morphisms model probabilistic processes. The copy morphism `X → X ⊗ X` creates perfect correlation (both outputs always equal). The delete morphism `X → I` marginalizes (sums/integrates out variables). This structure captures probability theory categorically. The same theorem proves results for: - Finite probability (stochastic matrices) - Measure theory (Markov kernels) - Kleisli categories of probability monads Fritz (2020) used this to prove categorical versions of Fisher-Neyman, Basu's theorem, and other core statistics results. ## Implementation - `MarkovCategory`: Extends `SymmetricCategory` with canonical comonoid structure - `copyMor X : X ⟶ X ⊗ X` and `delMor X : X ⟶ I` for each object - Coherence axioms: commutativity, counitality, coassociativity - Compatibility with tensor products Key design point: The comonoid structure is canonical (fields of the typeclass), not chosen. This matches the probability interpretation where there's exactly one way to copy/marginalize. ## Examples included 1. Cartesian categories: Every cartesian monoidal category forms a Markov category where copy is the diagonal `x ↦ (x,x)` and delete is the terminal morphism. All morphisms are deterministic. 2. FinStoch: Objects are finite types. Morphisms are stochastic matrices (rows sum to 1). This models finite probability spaces with the usual matrix multiplication for composition. ## Scope and review notes This PR provides the basic structure only. Future PRs would add: - Conditional independence - Sufficient statistics - Connection to measure-theoretic probability - More examples (Kleisli categories, Gaussian categories) I'm neither an expert in this material nor in Lean; I've only read a few papers on Markov categories and have gone through tutorial material in Lean. Please review for mathematical correctness and idiomatic Lean. I kept this PR small to check if mathlib wants this addition and to ensure it meets repository standards. ## Why add this now Markov categories provide a useful abstraction level for probability in type theory. Adding it to mathlib enables future work on categorical probability and statistics. In particular, I'm working on a probabilistic programming library and would like to write some proofs using these constructs. ## References - Fritz, T. (2020). [A synthetic approach to Markov kernels, conditional independence and theorems on sufficient statistics](https://arxiv.org/abs/1908.07021). *Advances in Mathematics*, 370, 107239. - Cho, K., & Jacobs, B. (2019). [Disintegration and Bayesian inversion via string diagrams](https://arxiv.org/abs/1709.00322). *Mathematical Structures in Computer Science*, 29(7), 938-971. --- All definitions include docstrings. The PR has tests for the core functionality. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory new-contributor 2414/7 Mathlib.lean,Mathlib/CategoryTheory/Bicategory/Monad/Basic.lean,Mathlib/CategoryTheory/CopyDiscardCategory/Basic.lean,Mathlib/CategoryTheory/CopyDiscardCategory/Deterministic.lean,Mathlib/CategoryTheory/MarkovCategory/Basic.lean,Mathlib/CategoryTheory/MarkovCategory/Cartesian.lean,Mathlib/CategoryTheory/MarkovCategory/FinStoch/Basic.lean,Mathlib/CategoryTheory/MarkovCategory/FinStoch/Braided.lean,Mathlib/CategoryTheory/MarkovCategory/FinStoch/CopyDiscard.lean,Mathlib/CategoryTheory/MarkovCategory/FinStoch/Markov.lean,Mathlib/CategoryTheory/MarkovCategory/FinStoch/Monoidal.lean,Mathlib/CategoryTheory/Monoidal/Bimon_.lean,Mathlib/CategoryTheory/Monoidal/CommComon_.lean,Mathlib/CategoryTheory/Monoidal/Comon_.lean,MathlibTest/CategoryTheory/MarkovCategory.lean,docs/references.bib 16 28 ['github-actions', 'jcreinhold', 'joelriou', 'mathlib4-merge-conflict-bot'] nobody
203-49644
6 months ago
208-55768
208 days ago
0-10638
2 hours
27829 dupuisf
author:dupuisf
 feat: modify `cfc_tac` to use `grind` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 60/50 Mathlib/Algebra/Order/Star/Basic.lean,Mathlib/Algebra/Star/SelfAdjoint.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Integral.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/NonUnital.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Unital.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/ExpLog.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/PosPart/Basic.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/Rpow/Basic.lean,Mathlib/Tactic/ContinuousFunctionalCalculus.lean 9 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
202-51555
6 months ago
258-49115
258 days ago
0-1
1 second
21950 erdOne
author:erdOne
 feat(NumberTheory/Padics): the completion of `ℚ` at a finite place is `ℚ_[p]` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-number-theory 253/1 Mathlib.lean,Mathlib/Algebra/GroupWithZero/WithZero.lean,Mathlib/NumberTheory/Padics/HeightOneSpectrum.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/Topology/Algebra/Valued/WithVal.lean,Mathlib/Topology/Algebra/WithZeroMulInt.lean,Mathlib/Topology/Algebra/WithZeroTopology.lean 7 33 ['Ruben-VandeVelde', 'erdOne', 'faenuccio', 'github-actions', 'leanprover-community-bot-assistant', 'pechersky', 'smmercuri', 'xroblot'] nobody
202-48564
6 months ago
283-48501
283 days ago
73-13048
73 days
26178 ppls-nd-prs
author:ppls-nd-prs
 feat(CategoryTheory/Limits): Fubini for products We show that the product of products is a product indexed by the sigma type. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory new-contributor 17/0 Mathlib/CategoryTheory/Limits/Shapes/Products.lean 1 6 ['chrisflav', 'github-actions', 'leanprover-community-bot-assistant', 'ppls-nd-prs', 'robin-carlier'] nobody
199-63857
6 months ago
300-73257
300 days ago
0-47289
13 hours
27214 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Limits/Shapes/Pullback/Categorical): Categorical pullback squares In this PR, we give the definition and first basic properties of categorical pullback squares. Using our previous work on `CategoricalPullback`, we define a typeclass `CatPullbackSquare T L R B` that asserts that a given `CatCommSq T L R B` is a "pullback square": this is the data of a chosen adjoint equivalence to the canonical functor from the top left corner of the square to the categorical pulback of its leg. Using this equivalence, be derive a universal property for functors from `X`with values in the top left corner of the square: they are equivalent to `CatCommSqOver R B X`, the category of categorical commutative squares over the cospan `R, B` with top left corner `X`. We prove some coherence result for this equivalence, most notably an isomorphism that, given `S : CatCommSqOver R B X`, bundles the two commutative triangles formed by the induced functor, and the coherence between the squares that these isomorphisms satisfy: this is conveniently bundled in the data of a single isomorphisms of `CatCommSqOver R B X`. Finally, we provide a `Prop`-class `IsCatPullbackSquare` that merely asserts the existence (via `Nonempty`) of the relevant data: we show that it is tautotogically equivalent to the propopsition that the canonical functor to the categorical pullback is an equivalence. --- - [ ] depends on: #26679 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory 786/1 Mathlib.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Basic.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Square.lean 3 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
199-38646
6 months ago
199-38647
199 days ago
0-4775
1 hour
27391 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Limits/Shapes/Pullback/Categorical): pseudofunctoriality structure of categorical pullback squares Using pseudofunctoriality of the construction `CatCommSqOver`, we show that categorical pullback squares have pseudofunctorial-like structures: given a `CatCommSq T L R B` and a `CatPullbackSq T' L' R' B'`, and a `CatCospanTransform R B R' B'`, there is a functor `CatPullbackSq.functorOfTransform` between the top left corners of the two squares. We give `CatCommSq` instances that relates this functor with other constructions such as `CatCommSqOver.transform`. Similarly, we construct `CatPullbackSq.functorOfTransform₂`, that maps morphisms of `CatCospanTransforms` to natural transformations. Finally, we show that `functorOfTransform` respects identities and compositions. We do not yet prove that all of this data satisfies all the expected properties of pseudofunctors: this will be the content of a follow-up PR. --- - [ ] depends on: #27214 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-category-theory 1090/1 Mathlib.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Basic.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Square.lean 3 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
199-38644
6 months ago
267-57138
267 days ago
0-264
4 minutes
27432 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Limits/Shapes/Pullback/Categorical): pseudofunctoriality of categorical pulback squares In this PR, we show that the "unbundled pseudofunctor" data constructed in #27391 satisfy the axioms of an actual "unbundled pseudo-functor". This is intended to give all the required coherence for a formal bicategory-like proof of the fact that `CatCospanAdjunction`s from #26578 (resp. `CatCospanEquivalence`s from #26579) promote to adjunctions (resp. equivalences) between the top left corners of categorical pullback squares. --- - [ ] depends on: #27391 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-category-theory 1244/1 Mathlib.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Basic.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Square.lean 3 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
199-38642
6 months ago
266-42839
266 days ago
0-1056
17 minutes
27481 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Limits/Shapes/Pullback/Categorical): adjunctions and equivalences of categorical pullback squares We show that a `CatCospanAdjunction` (resp `CatCospanEquivalence`) induces adjunctions (resp. equivalences) of the categories that sit at the top left corners of categorical pullback squares via the pseudofunctoriality proved in #27432. Thanks to the lemmas that proves that categorical pullback squares are fully pseudofunctorial, the proof is purely formal ("a pseudofunctor maps adjunctions (resp. equivalences) to adjunctions (resp. equivalences)"), rather than being a painful computation for the triangle equalities. In particular, the results here show that two categorical pullback squares with equivalent "underlying categorical cospan" are equivalent, which realizes the equivalence-invariance of the notion of categorical pullbacks. We do not yet show that a (not-necessarily pullback) `CatCommSq T L R B` equivalent to a `CatPullbackSquare T' L' R' B'` via a `CatCospanEquivalence R B R' B'` is also a `CatPullbackSquare`: this will be the content of a follow-up PR. --- - [ ] depends on: #27432 - [ ] depends on: #26579 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-category-theory large-import 1829/1 Mathlib.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Basic.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/CatCospanTransform.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Square.lean 4 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
199-38640
6 months ago
265-40637
265 days ago
0-49
49 seconds
27686 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Limits/Shapes/Pullback/Categorical/Square): more API for `CatPullbackSquare` In this PR, we provide more API around the notion of categorical pullback squares. Having established the pseudofunctoriality of the notion in #27432, we characterize the behaviour of the equivalence `CatPullbackSquare.functorEquiv (π₁ R B) (π₂ R B) R B X : X ⥤ R ⊡ B ≌ CatCommSqOver R B X` via various (d)simp lemmas. This ports all the pseudofunctoriality and equivalence-invariance results of `CatPullbackSquare` to `CategoricalPullback`. We also show this equivalence is isomorphic to the one from `CategoricalPullback.functorEquiv`. Unfortunately, this small duplication is necessary, as `CatPullbackSquare.functorEquiv` is bulit using `CategoricalPullback.functorEquiv`. The equivalence `CategoricalPullback.functorEquiv` is now an implementation detail, the idiomatic way is to use `CatPullbackSquare.functorEquiv`; docstrings are updated accordingly. This deprecates some constructions and lemmas for `CategoricalPullback`: they are now special case of the API that is available for any categorical pullback square. --- - [ ] depends on: #27481 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-category-theory large-import 2245/74 Mathlib.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Basic.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/CatCospanTransform.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Square.lean 4 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
199-38515
6 months ago
260-44378
260 days ago
0-2752
45 minutes
27687 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Limits/Shapes/Pullback/Categorical): squares equivalent to a `CatPullbackSquare` We provide the last remaining piece of the "equivalence-invariance" of categorical pullback squares: given a `CatCommSq (T : C₁ ⥤ _) L R B`, a `CatPullbackSquare (T' : D₁ ⥤ _) L' R' B'`, a `ψ : CatCospanEquivalence R B R' B'` and an equivalence `C₁ ≌ D₁` that identifies to the functor induced by `ψ`, the `CatCommSq T L R B` can be promoted to a `CatPullbackSquare T L R B'`. In other words: a `CatCommSq` that is equivalent to a `CatPullbackSquare` is a `CatPullbackSquare`. --- - [ ] depends on: #27686 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-category-theory large-import 2318/74 Mathlib.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Basic.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/CatCospanTransform.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Square.lean 4 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
199-38513
6 months ago
260-44727
260 days ago
0-959
15 minutes
27688 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Limits/Shapes/Pullback/Categorical): coherence statement for `CatPullbackSquare.inverse` This PR records a "coherence" statement for `CatPullbackSquares`: it bridges the gap between the user-provided `inverse` field of the `CatPullbackSquare` structure, and the other way one can deduce an equivalence between the top left corner of the square and a categorical pullback (via the pseudofunctoriality of categorical pullback squares induced by the identity `CatCospanTransform`). We show the two possible natural isomorphisms on the inverses of the equivalences are in fact the same (hence the term "coherence"). --- - [ ] depends on: #27686 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-category-theory large-import 2351/74 Mathlib.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Basic.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/CatCospanTransform.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Square.lean 4 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
199-38512
6 months ago
260-44381
260 days ago
0-283
4 minutes
27689 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Limits/Shapes/Pullback/Categorical): horizontal pasting calculus for `CatPullbackSquare` Given two categorical commutative squares that can be horizontally pasted, we prove that if the rightmost square is a `CatPullbackSquare`, then the leftmost square is a `CatPullbackSquare` if and only if the horizontal composition of the squares is a `CatPullbackSquare`. This generalizes to `CatPullbackSquare` the well-known "pasting calculus" for pullback squares in a category. The statement is made available both in terms of the `Type`-class `CatPullbackSquare`, and in terms of the `Prop`-class `IsCatPullbackSquare`. --- - [ ] depends on: #27686 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-category-theory large-import 2562/74 Mathlib.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Basic.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/CatCospanTransform.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Pasting.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Square.lean 5 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
199-38510
6 months ago
260-43641
260 days ago
0-667
11 minutes
27690 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Limits/Shapes/Pullback/Categorical): vertical pasting calculus for `CatPullbackSquare` We mirror the constructions from #27689 to construct the vertical pasting calculus of `CatPullbackSquares`: given two vertically composable `CatCommSq` such that the bottom one is a `CatPullbackSquare`, the top square is a `CatPullbackSquare` if and only if the vertical composition (the "outer" square) is a `CatPullbackSquare`. --- - [ ] depends on: #27689 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-category-theory large-import 2841/74 Mathlib.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Basic.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/CatCospanTransform.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Pasting.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Square.lean 5 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
199-38508
6 months ago
259-63269
259 days ago
0-5969
1 hour
27740 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Limits/Shapes/Pullback/Categorical): pasting calculus for `CategoricalPullback` Specialize the pasting calculus for categorical pullback squares to `CategoricalPullback̀` by providing equivalences of categories `R ⊡ (B₁ ⋙ B₂) ≌ (π₂ R B₂) ⊡ B₁` and `(R₁ ⋙ R₂) ⊡ B ≌ R₁ ⊡ (π₁ R₂ B)`. The `@[simps!]` attribute works wonderfully on these equivalences so that their component all have the expected (d)simp lemmas. --- - [ ] depends on: #27690 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-category-theory large-import 2872/75 Mathlib.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Basic.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/CatCospanTransform.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Pasting.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Square.lean 5 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
199-38507
6 months ago
259-63789
259 days ago
0-507
8 minutes
26330 Timeroot
author:Timeroot
 feat: "Junk value" test file This PR continues the work from #25173. Original PR: https://github.com/leanprover-community/mathlib4/pull/25173 awaiting-author t-data 360/0 MathlibTest/Junk.lean 1 17 ['SnirBroshi', 'Timeroot', 'bryangingechen', 'github-actions', 'leanprover-community-bot-assistant', 'madvorak', 'pechersky', 'vihdzp'] pechersky
assignee:pechersky
199-5891
6 months ago
199-5891
199 days ago
48-73998
48 days
26466 robin-carlier
author:robin-carlier
 feat(AlgebraicTopology/SimplexCategory/Augmented): the canonical monoid object in the augmented simplex category Show that in the augmented simplex category, `⦋0⦌` is an internal monoid object. Future work will show that this is in fact the universal monoid object: for any monoidal category `C`, evaluation at `⦋0⦌` induces an equivalence of categories between `Mon_ C` and the category of monoidal functors from `AugmentedSimplexCategory` to `C`. The resulting augmented cosimplicial object one gets from this construction is sometimes called the "monoidal bar construction" attached to a monoid. This PR was split from #25743. --- - [ ] depends on: #25743 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebraic-topology t-category-theory 571/111 Mathlib.lean,Mathlib/AlgebraicTopology/SimplexCategory/Augmented.lean,Mathlib/AlgebraicTopology/SimplexCategory/Augmented/Basic.lean,Mathlib/AlgebraicTopology/SimplexCategory/Augmented/Mon_.lean,Mathlib/AlgebraicTopology/SimplexCategory/Augmented/Monoidal.lean,Mathlib/AlgebraicTopology/SimplexCategory/Basic.lean 6 4 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
198-58048
6 months ago
293-65332
293 days ago
0-1708
28 minutes
28074 grunweg
author:grunweg
 Isbilinearmap TODO see if it builds, move everything to the right place, add docs. update Pr description - written by Patrick, part of #26221 (and prereq for #28056) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 64/0 Mathlib/Analysis/Normed/Module/FiniteDimension.lean,Mathlib/LinearAlgebra/BilinearMap.lean 2 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
198-24415
6 months ago
252-70331
252 days ago
0-2
2 seconds
26579 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Limits/Pullbacks/Categorical/CatCospanTransform): equivalences of categorical cospans Building on the notion of adjunctions of categorical cospans, we define equivalences of categorical cospans as a structure extending that of an adjunction, with the extra data of a chosen inverse of the unit and counit morphisms. To mirror the design for usual equivalences of categories, we provide an alternative constructor that requires the forward and inverse direction of the equivalence, as well as unit and counits already as isomorphisms, and only a proof of the left triangle identity. Finally, we also provide a third constructor that builds such an equivalence out of the data of 3 component equivalences of categories, as well as chosen `CatCommSq` on the functors of the these equivalences. This notion of equivalence of categorical cospans is intended to encode the required data to show the full equivalence invariance of the categorical pullback defined in #26366. --- - [ ] depends on: #26578 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-category-theory large-import 438/0 Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/CatCospanTransform.lean 1 5 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
197-64912
6 months ago
289-69453
289 days ago
0-838
13 minutes
26578 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Limits/Pullbacks/Categorical/CatCospanTransform): adjunctions of categorical cospans We build upon the bicategory-like structure developed in #26447 and #26412 to define the notion of adjunctions of categorical cospans. This is a structure encoding the data of two `CatCospanTransform`s, along with the usual unit and counit morphisms as part of the data, satisfying the usual left and right triangle identities. We provide basic API for these, such as extracting adjunctions between individual components. We also provide a proof that the notion satisfies a "coherence": with our chosen constructor, the forward direction of the structure `CatCommSq` on the left adjoints correspond to the inverse of the square for the right adjoints through `mateEquiv`. These adjunctions will be used as a substrate for defining equivalences of categorical cospans in a future PR: such an equivalence will be a structure extending a `CatCospanAdjunction` with isomorphisms data on the unit and co-unit (we will however provide alternative constructors in sync with the constructor for equivalences of categories). --- - [x] depends on: #26447 - [x] depends on: #26547 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory large-import 205/0 Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/CatCospanTransform.lean 1 5 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
197-61273
6 months ago
289-70445
289 days ago
0-625
10 minutes
26115 grunweg
author:grunweg
 WIP/proof of concept,feat: the inverse function theorem for manifolds --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-differential-geometry 348/0 Mathlib.lean,Mathlib/Analysis/Calculus/ContDiff/Defs.lean,Mathlib/Geometry/Manifold/InverseFunctionTheorem.lean,Mathlib/Topology/PartialHomeomorph.lean 4 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
196-63160
6 months ago
unknown
0-0
0 seconds
28245 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Bicategory/NaturalTransformation/Icon): strict associativity and unitality of icon composition We show that the vertical composition of icons defined in #28244 satisfies strict associativity and strict unitality. This morally shows that icons are fit as the 2-cells of a bicategory structure on bicategories and lax functors, though we do not record an instance of this sort. --- - [ ] depends on: #28244 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP blocked-by-other-PR t-category-theory awaiting-CI large-import merge-conflict 975/33 Mathlib.lean,Mathlib/CategoryTheory/Bicategory/EqToHom.lean,Mathlib/CategoryTheory/Bicategory/NaturalTransformation/Icon.lean,Mathlib/CategoryTheory/Bicategory/NaturalTransformation/Lax.lean,Mathlib/CategoryTheory/Bicategory/NaturalTransformation/Oplax.lean,Mathlib/CategoryTheory/Bicategory/Strict.lean,Mathlib/CategoryTheory/EqToHom.lean,scripts/noshake.json 8 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
196-29784
6 months ago
248-44523
248 days ago
0-537
8 minutes
30079 dagurtomas
author:dagurtomas
 feat(CategoryTheory): IsSheafFor as a multiequalizer condition --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-category-theory 112/0 Mathlib/CategoryTheory/Sites/Multifork.lean 1 3 ['chrisflav', 'github-actions', 'joelriou'] nobody
196-17108
6 months ago
198-82314
198 days ago
0-1
1 second
29012 grunweg
author:grunweg
 chore: reduce `Topology` imports in `Data` Move Data.Real.Sqrt to Analysis. --- - [ ] depends on: #28966 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict file-removed 25/21 Archive/Imo/Imo1959Q2.lean,Archive/Imo/Imo1960Q2.lean,Archive/Imo/Imo2008Q3.lean,Archive/Imo/Imo2008Q4.lean,Archive/Sensitivity.lean,Mathlib.lean,Mathlib/Algebra/Star/CHSH.lean,Mathlib/Analysis/Complex/Norm.lean,Mathlib/Analysis/LocallyConvex/WithSeminorms.lean,Mathlib/Analysis/Normed/Module/Ball/Homeomorph.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/Analysis/Real/Sqrt.lean,Mathlib/Data/Rat/NatSqrt/Real.lean,Mathlib/Data/Real/CompleteField.lean,Mathlib/Data/Real/Irrational.lean,Mathlib/Data/Real/StarOrdered.lean,Mathlib/NumberTheory/Zsqrtd/ToReal.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean,Mathlib/Tactic/NormNum/RealSqrt.lean,MathlibTest/positivity.lean 20 5 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
195-56586
6 months ago
197-66438
197 days ago
0-11345
3 hours
26601 yuma-mizuno
author:yuma-mizuno
 feat(CategoryTheory): make `Functor.comp` irreducible [#mathlib4 > Functor identity `𝟭 _ ⋙ F = F` is definitional equality](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Functor.20identity.20.60.F0.9D.9F.AD.20_.20.E2.8B.99.20F.20.3D.20F.60.20is.20definitional.20equality/with/523978659) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-category-theory 514/261 Mathlib/AlgebraicTopology/DoldKan/Compatibility.lean,Mathlib/AlgebraicTopology/SimplexCategory/Defs.lean,Mathlib/CategoryTheory/Adjunction/Basic.lean,Mathlib/CategoryTheory/CatCommSq.lean,Mathlib/CategoryTheory/Category/Cat.lean,Mathlib/CategoryTheory/Category/RelCat.lean,Mathlib/CategoryTheory/Category/ULift.lean,Mathlib/CategoryTheory/Core.lean,Mathlib/CategoryTheory/Discrete/Basic.lean,Mathlib/CategoryTheory/EqToHom.lean,Mathlib/CategoryTheory/Equivalence.lean,Mathlib/CategoryTheory/Functor/Basic.lean,Mathlib/CategoryTheory/Functor/Category.lean,Mathlib/CategoryTheory/Functor/Const.lean,Mathlib/CategoryTheory/Functor/Currying.lean,Mathlib/CategoryTheory/Functor/CurryingThree.lean,Mathlib/CategoryTheory/Functor/FullyFaithful.lean,Mathlib/CategoryTheory/Functor/Functorial.lean,Mathlib/CategoryTheory/Functor/ReflectsIso/Basic.lean,Mathlib/CategoryTheory/Functor/TwoSquare.lean,Mathlib/CategoryTheory/Groupoid/FreeGroupoid.lean,Mathlib/CategoryTheory/Join/Basic.lean,Mathlib/CategoryTheory/Limits/Cones.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Basic.lean,Mathlib/CategoryTheory/ObjectProperty/FullSubcategory.lean,Mathlib/CategoryTheory/Opposites.lean,Mathlib/CategoryTheory/PathCategory/Basic.lean,Mathlib/CategoryTheory/Pi/Basic.lean,Mathlib/CategoryTheory/Products/Associator.lean,Mathlib/CategoryTheory/Products/Basic.lean,Mathlib/CategoryTheory/Quotient.lean,Mathlib/CategoryTheory/Sigma/Basic.lean,Mathlib/CategoryTheory/Whiskering.lean,Mathlib/CategoryTheory/Yoneda.lean 34 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] nobody
195-44387
6 months ago
unknown
0-0
0 seconds
23621 astrainfinita
author:astrainfinita
 chore: deprecate `LinearOrderedComm{Monoid, Group}WithZero` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #20676 merge-conflict t-algebra t-order
label:t-algebra$
 261/205 Archive/Imo/Imo1998Q2.lean,Counterexamples/LinearOrderWithPosMulPosEqZero.lean,Mathlib/Algebra/Order/Field/Canonical.lean,Mathlib/Algebra/Order/Field/Rat.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/GroupWithZero/Finset.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Order/Nonneg/Field.lean,Mathlib/Algebra/Order/Nonneg/Ring.lean,Mathlib/Algebra/Order/Ring/Nat.lean,Mathlib/Combinatorics/Additive/PluenneckeRuzsa.lean,Mathlib/Combinatorics/SimpleGraph/Triangle/Basic.lean,Mathlib/Data/ENNReal/Basic.lean,Mathlib/Data/NNRat/Lemmas.lean,Mathlib/Data/NNReal/Defs.lean,Mathlib/Data/Rat/Cast/Order.lean,Mathlib/FieldTheory/IntermediateField/Adjoin/Defs.lean,Mathlib/FieldTheory/RatFunc/AsPolynomial.lean,Mathlib/GroupTheory/ArchimedeanDensely.lean,Mathlib/NumberTheory/EllipticDivisibilitySequence.lean,Mathlib/NumberTheory/FunctionField.lean,Mathlib/NumberTheory/Ostrowski.lean,Mathlib/RingTheory/Valuation/Archimedean.lean,Mathlib/RingTheory/Valuation/Basic.lean,Mathlib/RingTheory/Valuation/ExtendToLocalization.lean,Mathlib/RingTheory/Valuation/Integers.lean,Mathlib/RingTheory/Valuation/Integral.lean,Mathlib/RingTheory/Valuation/Minpoly.lean,Mathlib/RingTheory/Valuation/Quotient.lean,Mathlib/RingTheory/Valuation/RankOne.lean,Mathlib/RingTheory/Valuation/ValExtension.lean,Mathlib/RingTheory/Valuation/ValuationRing.lean,Mathlib/RingTheory/Valuation/ValuationSubring.lean,Mathlib/SetTheory/Cardinal/Order.lean,Mathlib/Topology/Algebra/Valued/LocallyCompact.lean,Mathlib/Topology/Algebra/Valued/NormedValued.lean,Mathlib/Topology/Algebra/Valued/ValuationTopology.lean,Mathlib/Topology/Algebra/Valued/ValuedField.lean,Mathlib/Topology/Algebra/Valued/WithVal.lean,Mathlib/Topology/Algebra/WithZeroTopology.lean,Mathlib/Topology/UnitInterval.lean,MathlibTest/instance_diamonds.lean,scripts/noshake.json 44 24 ['YaelDillies', 'astrainfinita', 'github-actions', 'grunweg', 'leanprover-bot', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] kbuzzard
assignee:kbuzzard
194-42988
6 months ago
365-15361
365 days ago
5-42380
5 days
28630 Antidite
author:Antidite
 feat(Archive/Imo): right isosceles configuration in the complex plane feat(Archive/Imo): right isosceles configuration in the complex plane This adds `Archive/Imo/Imo1975Q3.lean`, formalizing a triangle configuration with points A=0, B=1, C=z and auxiliary points R, P, Q built via complex rotations and sine-based scale factors. Main results: * `angle_and_distance`: ∠QRP = π/2 and dist Q R = dist R P. * Key identity `QRP_rot90`: (Q z).z − R.z = e^{iπ/2} · ((P z).z − R.z). Design/Style: * Minimal imports; module docstring; semantic lemma names; all definitions and theorems live under the namespace `IMO.TriangleConfig`. Moves: - (none) Deletions: - (none) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) IMO awaiting-author new-contributor 196/0 Archive.lean,Archive/Imo/Imo1975Q3.lean 2 36 ['Antidite', 'LLaurance', 'github-actions', 'jsm28'] jsm28
assignee:jsm28
194-29603
6 months ago
194-29603
194 days ago
46-26438
46 days
30192 erdOne
author:erdOne
 feat(RingTheory): valuative topology = adic topology for discrete rank 1 valuations --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-ring-theory t-topology 190/2 Mathlib.lean,Mathlib/Order/Filter/Bases/Basic.lean,Mathlib/RingTheory/Valuation/ValuativeRel/Basic.lean,Mathlib/RingTheory/Valuation/ValuativeRel/Integers.lean,Mathlib/Topology/Algebra/Nonarchimedean/AdicTopology.lean,Mathlib/Topology/Algebra/Valued/ValuativeRel.lean 6 3 ['erdOne', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
193-58711
6 months ago
194-53156
194 days ago
0-331
5 minutes
26886 pechersky
author:pechersky
 feat(NumberTheory/Padics/ValuativeRel): ValuativeRel ℚ_[p] as well as instances for IsRankLeOne, IsNontrivial, IsDiscrete --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [ ] depends on: #26827 WIP t-number-theory blocked-by-other-PR t-algebra merge-conflict t-analysis
label:t-algebra$
 310/25 Mathlib.lean,Mathlib/Analysis/Normed/ValuativeRel.lean,Mathlib/NumberTheory/Padics/ValuativeRel.lean,Mathlib/Topology/Algebra/Valued/ValuativeRel.lean 4 4 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
193-16188
6 months ago
283-2101
283 days ago
0-401
6 minutes
27314 pechersky
author:pechersky
 feat(TopologyValued): `Valued` based on a range topology Switch from a topology based on `fun γ : Γ₀ˣ => (v.ltAddSubgroup γ : AddSubgroup R)` to ``` fun rs : {rs : R × R // v rs.1 ≠ 0 ∧ v rs.2 ≠ 0} ↦ (v.ltAddSubgroup (Units.mk0 (v rs.val.2 / v rs.val.1) (by simp [rs.prop])) : AddSubgroup R) ``` This is in preparation for using `IsValuativeTopology` instead. In fact, that basis is precisely what `ValuativeTopology` asserts. `Valued.mk'` is kept, we do not yet rely on `IsValuativeTopology` and `UniformSpace`. The new `Valued` behaves the same way as it did before for `MulArchimedean` valuation codomains, which are all of the current in-mathlib uses of `Valued`. This is, for rank-one valuations. For valuations which rank one, but do not pass to the whole codomain, there are helper lemmas to discuss open/closed/clopen sets. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #27264 - [x] depends on: #27265 - [ ] depends on: #27163 - [x] depends on: #27339 merge-conflict t-topology blocked-by-other-PR 733/259 Mathlib/Analysis/Normed/Field/Basic.lean,Mathlib/FieldTheory/RatFunc/AsPolynomial.lean,Mathlib/NumberTheory/FunctionField.lean,Mathlib/RingTheory/LaurentSeries.lean,Mathlib/RingTheory/Valuation/ValuativeRel.lean,Mathlib/Topology/Algebra/Valued/LocallyCompact.lean,Mathlib/Topology/Algebra/Valued/NormedValued.lean,Mathlib/Topology/Algebra/Valued/ValuationTopology.lean,Mathlib/Topology/Algebra/Valued/ValuativeRel.lean,Mathlib/Topology/Algebra/Valued/ValuedField.lean,Mathlib/Topology/Algebra/Valued/WithVal.lean,Mathlib/Topology/Algebra/Valued/WithZeroMulInt.lean 12 9 ['github-actions', 'kckennylau', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
192-49239
6 months ago
270-25326
270 days ago
0-746
12 minutes
30135 erdOne
author:erdOne
 feat(RingTheory): `ValuativeRel` on subrings --- @pechersky do we want this? [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-ring-theory 19/0 Mathlib/RingTheory/Valuation/ValuativeRel/Basic.lean 1 5 ['erdOne', 'github-actions', 'pechersky'] nobody
192-43284
6 months ago
193-15976
193 days ago
3-20137
3 days
28328 pechersky
author:pechersky
 chore(Topology/Valued): golf using local finite order of WithZeroTopology have to juggle in a version of `mrangeRestrict` which works on valuations, and also juggle the scoped topology over the subtype topology --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [ ] depends on: #28325 t-number-theory blocked-by-other-PR t-algebra large-import merge-conflict t-topology
label:t-algebra$
 187/88 Mathlib/Topology/Algebra/GroupWithZero.lean,Mathlib/Topology/Algebra/Valued/LocallyCompact.lean,Mathlib/Topology/Algebra/WithZeroTopology.lean,Mathlib/Topology/Compactness/Compact.lean 4 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
188-60660
6 months ago
246-77622
246 days ago
0-1600
26 minutes
29926 jcreinhold
author:jcreinhold
 feat(CategoryTheory/MarkovCategory): add basic finite stochastic matrices definitions to Markov category This PR introduces FinStoch, the category of finite stochastic matrices, as a concrete example of a Markov category. This PR builds on #29925, #29939, and #29919 and was split up from #29657. ## Main additions ### 1. Core definitions (`FinStoch/Basic.lean`) - `StochasticMatrix m n`: Matrices where rows sum to 1, representing conditional probabilities P(j|i) - `FinStoch`: The category with finite types as objects and stochastic matrices as morphisms - `DetMorphism`: Deterministic matrices (exactly one 1 per row) with their underlying functions - Composition: Matrix multiplication preserves row-stochasticity via the Chapman-Kolmogorov equation Key design choices: - Row-stochastic convention: entry (i,j) is P(output=j | input=i) - Deterministic morphisms tracked separately for structural isomorphisms ### 2. Monoidal structure (`FinStoch/Monoidal.lean`) Implements tensor products modeling independent parallel processes: - Tensor on objects: Cartesian product of finite types - Tensor on morphisms: Kronecker product P((j₁,j₂)|(i₁,i₂)) = P(j₁|i₁) × P(j₂|i₂) - Structural morphisms: Associator, unitors use deterministic permutations - Coherence**: Pentagon and triangle identities verified computationally ## Mathematical significance FinStoch provides the canonical example of a Markov category: - Morphisms: Stochastic matrices/Markov chains - Composition: Chapman-Kolmogorov equation for multi-step transitions - Tensor: Independent parallel processes This models finite probability spaces categorically, where: - Objects represent sample spaces - Morphisms represent probabilistic transitions - Tensor products model independence ## References Fritz (2020) - [ ] depends on: #29925 merge-conflict t-category-theory new-contributor 1437/0 Mathlib.lean,Mathlib/CategoryTheory/CopyDiscardCategory/Basic.lean,Mathlib/CategoryTheory/CopyDiscardCategory/Deterministic.lean,Mathlib/CategoryTheory/MarkovCategory/Basic.lean,Mathlib/CategoryTheory/MarkovCategory/Cartesian.lean,Mathlib/CategoryTheory/MarkovCategory/FinStoch/Basic.lean,Mathlib/CategoryTheory/MarkovCategory/FinStoch/Monoidal.lean,MathlibTest/CategoryTheory/MarkovCategory.lean,docs/references.bib 9 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
188-40058
6 months ago
unknown
0-0
0 seconds
16773 arulandu
author:arulandu
 feat(Probability/Distributions): formalize Beta distribution Formalize Beta distribution, using Gamma distribution as a reference. Added real-valued beta wrapper, in the manner of gamma. Thanks to @EtienneC30 for help with casting real <-> complex. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author new-contributor t-measure-probability 286/1 Mathlib.lean,Mathlib/Analysis/SpecialFunctions/Gamma/Beta.lean,Mathlib/Probability/Distributions/Beta.lean 3 50 ['EtienneC30', 'arulandu', 'github-actions', 'mathlib4-merge-conflict-bot', 'vihdzp'] arulandu
assignee:arulandu
188-38908
6 months ago
578-66457
578 days ago
1-21124
1 day
30359 JLimperg
author:JLimperg
 [Not a PR] Benchmark for Aesop RPINF precompilation --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict file-removed 5/3 lake-manifest.json,lakefile.lean,scripts/bench/fake-root/lib/lean/libleanshared.so,scripts/bench/run 4 5 ['JLimperg', 'github-actions', 'leanprover-bot', 'mathlib4-merge-conflict-bot'] nobody
188-30915
6 months ago
unknown
0-0
0 seconds
30351 JLimperg
author:JLimperg
 [Not a PR] Benchmark Aesop's lazy forward state construction Testing the performance impact of an Aesop change. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict dependency-bump 3/3 lake-manifest.json,lakefile.lean 2 11 ['JLimperg', 'github-actions', 'leanprover-bot', 'mathlib4-merge-conflict-bot'] nobody
188-19816
6 months ago
unknown
0-0
0 seconds
30425 JLimperg
author:JLimperg
 [Not a PR] Benchmark Aesop with precompiled RPINF at instance transparency --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 5/3 lake-manifest.json,lakefile.lean,scripts/bench/fake-root/lib/lean/libleanshared.so,scripts/bench/run 4 3 ['JLimperg', 'github-actions', 'leanprover-bot'] nobody
188-13020
6 months ago
unknown
0-0
0 seconds
30438 JLimperg
author:JLimperg
 [Not a PR] Benchmark Aesop change that computes fewer RPINFs --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 5/3 lake-manifest.json,lakefile.lean,scripts/bench/fake-root/lib/lean/libleanshared.so,scripts/bench/run 4 5 ['JLimperg', 'github-actions', 'leanprover-bot'] nobody
187-43397
6 months ago
unknown
0-0
0 seconds
30440 JLimperg
author:JLimperg
 [Not a PR] Benchmark Aesop with no `hypTypes` in `ForwardState` and `instances` RPINF transparency --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 5/3 lake-manifest.json,lakefile.lean,scripts/bench/fake-root/lib/lean/libleanshared.so,scripts/bench/run 4 3 ['JLimperg', 'github-actions', 'leanprover-bot'] nobody
187-38878
6 months ago
unknown
0-0
0 seconds
30452 JLimperg
author:JLimperg
 [Not a PR] Benchmark Aesop with no `hypTypes` in `ForwardState`, RPINF at `instances` transparency and lazy forward state --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 5/3 lake-manifest.json,lakefile.lean,scripts/bench/fake-root/lib/lean/libleanshared.so,scripts/bench/run 4 3 ['JLimperg', 'github-actions', 'leanprover-bot'] nobody
187-19757
6 months ago
unknown
0-0
0 seconds
26284 plp127
author:plp127
 feat: faster implementation of `Nat.primeFactorsList` + `@[csimp]` lemma Add a function `Nat.primeFactorsListFast` that `#eval`s faster, and a `@[csimp]` lemma `Nat.primeFactorsList_eq_primeFactorsListFast` that shows `Nat.primeFactorsList = Nat.primeFactorsListFast`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-data 95/0 Mathlib/Data/Nat/Factors.lean 1 11 ['b-mehta', 'github-actions', 'grunweg', 'plp127'] b-mehta
assignee:b-mehta
186-55786
6 months ago
186-82999
186 days ago
111-15071
111 days
27990 kckennylau
author:kckennylau
 feat(Counterexamples): a nontrivial valuation with discrete topology This file constructs a valuation on `K[X]` satisfying `IsValuativeTopology K[X] ∧ Nonempty (valuation K[X]).RankOne ∧ IsNontrivial K[X] ∧ DiscreteTopology K[X]`, and proves that `IsValuativeTopology F ∧ IsNontrivial F ∧ DiscreteTopology F` is not possible if `F` is a field. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-ring-theory 172/0 Counterexamples.lean,Counterexamples/DiscreteTopologyWithNontrivialValuation.lean 2 14 ['github-actions', 'grunweg', 'kckennylau', 'mathlib4-merge-conflict-bot', 'pechersky'] nobody
186-45119
6 months ago
186-45120
186 days ago
67-79609
67 days
28243 robin-carlier
author:robin-carlier
 chore(CategoryTheory/Bicategory): move some `eqToHom` lemmas The file `CategoryTheory/Bicategory/EqToHom.lean` introduced in #28242 is a more suitable hom for the lemmas `CategoryTheory.Bicategory.whiskerLeft_eqToHom` and `CategoryTheory.Bicategory.eqToHom_whiskerRight` than the current `CategoryTheory/Bicategory/Strict.lean`. We move these lemmas to the new file, and make `CategoryTheory/Bicategory/Strict` import these lemmas. --- - [x] depends on: #28242 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory 165/23 Mathlib.lean,Mathlib/CategoryTheory/Bicategory/EqToHom.lean,Mathlib/CategoryTheory/Bicategory/Strict.lean,Mathlib/CategoryTheory/EqToHom.lean,scripts/noshake.json 5 9 ['github-actions', 'joelriou', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'robin-carlier'] nobody
186-41857
6 months ago
196-29787
196 days ago
0-9063
2 hours
26913 Paul-Lez
author:Paul-Lez
 feat(NumberTheory/{*}): add a few lemmas about number field and cyclotomic extensions The motivation for this PR is that the main statement in [this PR](https://github.com/google-deepmind/formal-conjectures/pull/297) shouldn't need to assume `p` has type `PNat` for the instances to work. This is still WIP as I need to clean up (currently waiting on the build!) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-number-theory t-algebra awaiting-CI merge-conflict
label:t-algebra$
 52/0 Mathlib/NumberTheory/ClassNumber/Temporary.lean,Mathlib/NumberTheory/Cyclotomic/Basic.lean,Mathlib/NumberTheory/Cyclotomic/Embeddings.lean,Mathlib/NumberTheory/NumberField/InfinitePlace/TotallyRealComplex.lean 4 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
183-46695
6 months ago
282-21069
282 days ago
0-28
28 seconds
27302 tristan-f-r
author:tristan-f-r
 feat(Fintype/Quotient): finLiftOn₂ The combination of [`Quotient.finLiftOn`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Data/Fintype/Quotient.html#Quotient.finLiftOn) and [`liftOn₂`](https://leanprover-community.github.io/mathlib4_docs/Init/Core.html#Quotient.liftOn%E2%82%82). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-data 19/0 Mathlib/Data/Fintype/Quotient.lean 1 12 ['github-actions', 'kckennylau', 'pechersky', 'tristan-f-r', 'vihdzp'] pechersky
assignee:pechersky
182-83051
6 months ago
182-83051
182 days ago
6-6533
6 days
28925 grunweg
author:grunweg
 chore: remove `linear_combination'` tactic When `linear_combination` was refactored in #15899, the old code was kept as the `linear_combination'` tactic, for easier migration. The consensus of the zulip discussion ([#mathlib4 > Narrowing the scope of `linear_combination` @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Narrowing.20the.20scope.20of.20.60linear_combination.60/near/470237816)) was to wait, and "revisit this once people have experienced the various tactics in practice". One year later, the old tactic has almost no uses: it is unused in mathlib; [searching on github](https://github.com/search?q=linear_combination%27%20path%3A*.lean&type=code) yields 37 hits --- all of which are in various forks of mathlib. Thus, removing this tactic seems appropriate. --- Do not merge before the zulip discussion has concluded! [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict file-removed awaiting-zulip 0/564 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/LinearCombination'.lean,Mathlib/Tactic/Linter/UnusedTactic.lean,MathlibTest/linear_combination'.lean 5 4 ['euprunin', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] nobody
182-78127
6 months ago
234-23524
234 days ago
0-1
1 second
29432 lecopivo
author:lecopivo
 feat: `data_synth` tactic to prove `HasFDerivAt 𝕜 f ?f' x` and similar New tactic `data_synth` that can prove proposition with holes e.g. figure out what `?f'` is and prove `HasFDerivAt 𝕜 f ?f' x` --- Tactic `data_synth` is designed to synthesize some data that satisfies some proposition. The canonical example is `HasFDerivAt 𝕜 f ?f' x`, this tactic will figure out `f'` and provide proof of `HasFDerivAt 𝕜 f f' x`. Another examples: `HasBoundinbBall s ?center ?radius` or `IsPolynomial f ?p` ``` def HasBoundingBall (s : Set α) (center : α) (radius : ℝ) : Prop := s ⊆ Metric.closedBall center radius def IsPolynomial (f : R → R) (p : Polynomial R) := f = p.eval ``` WIP t-meta 1932/0 Mathlib/Tactic/DataSynth.lean,Mathlib/Tactic/DataSynth/Attr.lean,Mathlib/Tactic/DataSynth/Core.lean,Mathlib/Tactic/DataSynth/Decl.lean,Mathlib/Tactic/DataSynth/Elab.lean,Mathlib/Tactic/DataSynth/FDeriv.lean,Mathlib/Tactic/DataSynth/FDeriv/Basic.lean,Mathlib/Tactic/DataSynth/FDeriv/Dispatch.lean,Mathlib/Tactic/DataSynth/FDeriv/Init.lean,Mathlib/Tactic/DataSynth/FDeriv/Simproc.lean,Mathlib/Tactic/DataSynth/Tests/BoundingBall.lean,Mathlib/Tactic/DataSynth/Tests/Compilation.lean,Mathlib/Tactic/DataSynth/Tests/FDeriv.lean,Mathlib/Tactic/DataSynth/Tests/FDerivInit.lean,Mathlib/Tactic/DataSynth/Tests/FwdDeriv.lean,Mathlib/Tactic/DataSynth/Tests/Normalize.lean,Mathlib/Tactic/DataSynth/Tests/Polynomial.lean,Mathlib/Tactic/DataSynth/Theorems.lean,Mathlib/Tactic/DataSynth/ToBatteries.lean,Mathlib/Tactic/DataSynth/Types.lean 20 3 ['JovanGerb', 'github-actions', 'lecopivo'] nobody
182-43045
6 months ago
220-63437
220 days ago
0-1834
30 minutes
29855 eric-wieser
author:eric-wieser
 chore(Data/Finset/Sort): lemmas about `0 : Fin _` and `Fin.last _` We already had these for `⟨0, ⋯⟩` and `⟨k - 1, ⋯⟩`. Moves: - `Finset.orderEmbOfFin_zero` -> `Finset.orderEmbOfFin_mk_zero` - `Finset.orderEmbOfFin_last` -> `Finset.orderEmbOfFin_mk_last` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data t-order delegated easy 17/7 Mathlib/Combinatorics/Enumerative/Composition.lean,Mathlib/Data/Finset/Sort.lean 2 4 ['eric-wieser', 'github-actions', 'mathlib-bors', 'ocfnash'] nobody
182-30276
6 months ago
203-62366
203 days ago
3-79002
3 days
19616 adamtopaz
author:adamtopaz
 fix: fix the definition of the absolute Galois group of a field Previously it was defined as the Galois group of the algebraic closure, as opposed to the separable closure. Also, this adds some missing instances for this group. Still missing is compactness, but that seems like a bigger project. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra awaiting-author t-number-theory
label:t-algebra$
 23/8 Mathlib/FieldTheory/AbsoluteGaloisGroup.lean,Mathlib/FieldTheory/KrullTopology.lean 2 4 ['acmepjz', 'alreadydone', 'github-actions'] nobody
180-71898
5 months ago
499-50394
499 days ago
3-64280
3 days
28826 alreadydone
author:alreadydone
 feat(CategoryTheory): Additive and Linear when Hom types are only monoids + introduce Presemiadditive categories, which generalizes Preadditive categories: the Hom sets are commutative monoids rather than groups, and `comp_zero` and `zero_comp` is no longer automatic. The new file Preadditive/Semi.lean is adapted from Preadditive/Basic.lean, though many contents can't be generalized. + generalize Functor.Additive and Functor.Linear to take Presemiadditive categories instead. The former needs a `map_zero` field since it's not automatic for Presemiadditive categories. + introduce SemimoduleCat, the category of semimodules (mathlib's Module) over a Semiring. The new file ModuleCat/Semi.lean is copied from ModuleCat/Basic.lean. TODOs: additive/linear equivalence between SemimoduleCat and ModuleCat and use it to transfer results; monoidal structure on SemimoduleCat; change `CommRing.Pic` to use SemimoduleCat. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-category-theory awaiting-CI 978/123 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Semi.lean,Mathlib/Algebra/Category/MonCat/Presemiadditive.lean,Mathlib/CategoryTheory/Linear/Basic.lean,Mathlib/CategoryTheory/Preadditive/AdditiveFunctor.lean,Mathlib/CategoryTheory/Preadditive/Basic.lean,Mathlib/CategoryTheory/Preadditive/Biproducts.lean,Mathlib/CategoryTheory/Preadditive/FunctorCategory.lean,Mathlib/CategoryTheory/Preadditive/Semi.lean 9 4 ['alreadydone', 'github-actions', 'mathlib4-merge-conflict-bot', 'plp127'] nobody
180-65683
5 months ago
236-14128
236 days ago
0-1
1 second
16428 astrainfinita
author:astrainfinita
 test use `QuotLike` APIs --- - [ ] depends on: #16421 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 1501/564 Mathlib.lean,Mathlib/Algebra/Associated/Basic.lean,Mathlib/Algebra/BigOperators/Associated.lean,Mathlib/Algebra/GCDMonoid/Basic.lean,Mathlib/Algebra/Group/Conj.lean,Mathlib/Algebra/GroupWithZero/NonZeroDivisors.lean,Mathlib/Algebra/Order/CauSeq/Completion.lean,Mathlib/Algebra/Quandle.lean,Mathlib/CategoryTheory/IsomorphismClasses.lean,Mathlib/CategoryTheory/Monoidal/Free/Basic.lean,Mathlib/CategoryTheory/Monoidal/Free/Coherence.lean,Mathlib/CategoryTheory/Skeletal.lean,Mathlib/Data/Finmap.lean,Mathlib/Data/Fintype/Quotient.lean,Mathlib/Data/Multiset/Basic.lean,Mathlib/Data/Multiset/Functor.lean,Mathlib/Data/QPF/Multivariate/Constructions/Fix.lean,Mathlib/Data/QPF/Univariate/Basic.lean,Mathlib/Data/Quot.lean,Mathlib/Data/QuotLike.lean,Mathlib/Data/Real/Basic.lean,Mathlib/Data/Setoid/Basic.lean,Mathlib/GroupTheory/Coset/Basic.lean,Mathlib/GroupTheory/Coset/Defs.lean,Mathlib/GroupTheory/GroupAction/Basic.lean,Mathlib/GroupTheory/GroupAction/ConjAct.lean,Mathlib/GroupTheory/GroupAction/Defs.lean,Mathlib/GroupTheory/QuotientGroup/Basic.lean,Mathlib/GroupTheory/QuotientGroup/Defs.lean,Mathlib/GroupTheory/Subgroup/Center.lean,Mathlib/LinearAlgebra/Quotient/Basic.lean,Mathlib/LinearAlgebra/Quotient/Defs.lean,Mathlib/Logic/Encodable/Basic.lean,Mathlib/Logic/Equiv/Basic.lean,Mathlib/Logic/Relation.lean,Mathlib/Order/RelIso/Basic.lean,Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/Cardinal/Finite.lean,Mathlib/SetTheory/Game/Basic.lean,Mathlib/SetTheory/Lists.lean,Mathlib/SetTheory/ZFC/Basic.lean,Mathlib/Topology/Inseparable.lean,test/QuotLike.lean 43 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
179-80262
5 months ago
unknown
0-0
0 seconds
16210 astrainfinita
author:astrainfinita
 Clean up quotient APIs ~~We may migrate to `Quot` and `IsEquiv` APIs in the future, but it might be a good start to clean up `Quotient` APIs anyway.~~ The diffs in this PR did not include `QuotLike` APIs, but eventually I decided to migrate to `QuotLike` before deprecating some old APIs. This is because some lemmas don't have alternatives that don't use `· ≈ ·`, and the alternatives that use `· ≈ ·` are in the core. See [Zulip](https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/.60.28.C2.B7.20.E2.89.88.20.C2.B7.29.60.20in.20.60Quotient.60.20APIs/near/466970386). --- - [x] depends on: #16254 - [x] depends on: #16256 - [x] depends on: #16258 - [x] depends on: #16260 - [x] depends on: #16264 - [x] depends on: #16267 - [ ] depends on: #16314 - [x] depends on: #16410 - [x] depends on: #17588 - [x] depends on: #17594 - [x] depends on: #17940 - [ ] depends on: #17941 --- `QuotLike` - [ ] depends on: #16421 - [ ] depends on: #16428 --- [remaining diffs](https://github.com/leanprover-community/mathlib4/compare/FR_quot_now..FR_quot) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict tech debt blocked-by-other-PR t-data 1015/1114 Counterexamples/CliffordAlgebraNotInjective.lean,Mathlib/Algebra/Associated/Basic.lean,Mathlib/Algebra/BigOperators/Group/Finset.lean,Mathlib/Algebra/CharZero/Quotient.lean,Mathlib/Algebra/DirectLimit.lean,Mathlib/Algebra/GCDMonoid/Basic.lean,Mathlib/Algebra/Lie/Free.lean,Mathlib/Algebra/Lie/Quotient.lean,Mathlib/Algebra/Module/Torsion.lean,Mathlib/Algebra/Module/Zlattice/Basic.lean,Mathlib/Algebra/Order/CauSeq/Completion.lean,Mathlib/Algebra/Periodic.lean,Mathlib/Algebra/RingQuot.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Scheme.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/StructureSheaf.lean,Mathlib/Analysis/Normed/Group/Quotient.lean,Mathlib/Analysis/Normed/Group/SemiNormedGrp/Kernels.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Angle.lean,Mathlib/CategoryTheory/ConnectedComponents.lean,Mathlib/CategoryTheory/Limits/Shapes/SingleObj.lean,Mathlib/CategoryTheory/Limits/Types.lean,Mathlib/CategoryTheory/Skeletal.lean,Mathlib/CategoryTheory/Subobject/Basic.lean,Mathlib/CategoryTheory/Subobject/FactorThru.lean,Mathlib/CategoryTheory/Subobject/Lattice.lean,Mathlib/Combinatorics/Quiver/ConnectedComponent.lean,Mathlib/Combinatorics/SimpleGraph/Path.lean,Mathlib/Computability/Reduce.lean,Mathlib/Computability/TuringMachine.lean,Mathlib/Data/Countable/Defs.lean,Mathlib/Data/FinEnum.lean,Mathlib/Data/Finite/Basic.lean,Mathlib/Data/Fintype/Basic.lean,Mathlib/Data/Fintype/Card.lean,Mathlib/Data/Fintype/Quotient.lean,Mathlib/Data/List/Cycle.lean,Mathlib/Data/Multiset/Basic.lean,Mathlib/Data/Quot.lean,Mathlib/Data/Set/Image.lean,Mathlib/Data/Setoid/Basic.lean,Mathlib/Data/Setoid/Partition.lean,Mathlib/Data/Sym/Sym2.lean,Mathlib/FieldTheory/IsAlgClosed/AlgebraicClosure.lean,Mathlib/FieldTheory/PerfectClosure.lean,Mathlib/FieldTheory/SplittingField/Construction.lean,Mathlib/GroupTheory/Abelianization.lean,Mathlib/GroupTheory/Commensurable.lean,Mathlib/GroupTheory/CommutingProbability.lean,Mathlib/GroupTheory/Complement.lean,Mathlib/GroupTheory/Congruence/Basic.lean,Mathlib/GroupTheory/Coprod/Basic.lean,Mathlib/GroupTheory/Coset/Basic.lean,Mathlib/GroupTheory/DoubleCoset.lean,Mathlib/GroupTheory/FreeAbelianGroup.lean,Mathlib/GroupTheory/GroupAction/Basic.lean,Mathlib/GroupTheory/GroupAction/ConjAct.lean,Mathlib/GroupTheory/GroupAction/Quotient.lean,Mathlib/GroupTheory/Index.lean,Mathlib/GroupTheory/MonoidLocalization/Basic.lean,Mathlib/GroupTheory/Nilpotent.lean,Mathlib/GroupTheory/PGroup.lean,Mathlib/GroupTheory/Perm/Cycle/Concrete.lean,Mathlib/GroupTheory/QuotientGroup/Basic.lean,Mathlib/GroupTheory/SchurZassenhaus.lean,Mathlib/GroupTheory/Sylow.lean,Mathlib/GroupTheory/Transfer.lean,Mathlib/LinearAlgebra/Alternating/DomCoprod.lean,Mathlib/LinearAlgebra/Dimension/Constructions.lean,Mathlib/LinearAlgebra/InvariantBasisNumber.lean,Mathlib/LinearAlgebra/Isomorphisms.lean,Mathlib/LinearAlgebra/Projectivization/Basic.lean,Mathlib/LinearAlgebra/Quotient.lean,Mathlib/LinearAlgebra/QuotientPi.lean,Mathlib/Logic/Encodable/Basic.lean,Mathlib/MeasureTheory/Constructions/Polish/Basic.lean,Mathlib/MeasureTheory/Function/AEEqFun.lean,Mathlib/MeasureTheory/Group/FundamentalDomain.lean,Mathlib/MeasureTheory/MeasurableSpace/Basic.lean,Mathlib/MeasureTheory/Measure/Haar/Quotient.lean,Mathlib/ModelTheory/DirectLimit.lean,Mathlib/ModelTheory/Fraisse.lean,Mathlib/ModelTheory/Ultraproducts.lean,Mathlib/NumberTheory/NumberField/Embeddings.lean,Mathlib/NumberTheory/NumberField/Units/DirichletTheorem.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/NumberTheory/RamificationInertia.lean,Mathlib/Order/Antisymmetrization.lean,Mathlib/Order/Category/PartOrd.lean,Mathlib/Order/Filter/Germ/Basic.lean,Mathlib/Order/Partition/Finpartition.lean,Mathlib/Order/RelIso/Basic.lean,Mathlib/RepresentationTheory/GroupCohomology/Hilbert90.lean,Mathlib/RingTheory/AdicCompletion/Algebra.lean,Mathlib/RingTheory/AdicCompletion/Basic.lean,Mathlib/RingTheory/AdicCompletion/Functoriality.lean,Mathlib/RingTheory/AdjoinRoot.lean,Mathlib/RingTheory/Congruence/Basic.lean,Mathlib/RingTheory/Flat/Basic.lean,Mathlib/RingTheory/GradedAlgebra/HomogeneousLocalization.lean 134 6 ['astrainfinita', 'github-actions', 'leanprover-bot', 'leanprover-community-mathlib4-bot'] nobody
179-80261
5 months ago
unknown
0-0
0 seconds
30642 thorimur
author:thorimur
 bench: lean4#10832 merge-conflict large-import 507/460 .github/workflows/nightly-docgen.yml,Cache/IO.lean,Mathlib.lean,Mathlib/Algebra/Algebra/StrictPositivity.lean,Mathlib/Algebra/BigOperators/Group/List/Basic.lean,Mathlib/Algebra/BigOperators/Group/List/Lemmas.lean,Mathlib/Algebra/Group/Units/Defs.lean,Mathlib/Algebra/Notation/Defs.lean,Mathlib/Algebra/Order/Ring/Unbundled/Rat.lean,Mathlib/Algebra/Polynomial/RuleOfSigns.lean,Mathlib/AlgebraicTopology/SimplexCategory/GeneratorsRelations/NormalForms.lean,Mathlib/Analysis/LocallyConvex/WithSeminorms.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/ExpLog.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/Rpow/Basic.lean,Mathlib/Combinatorics/SimpleGraph/CompleteMultipartite.lean,Mathlib/Combinatorics/SimpleGraph/FiveWheelLike.lean,Mathlib/Computability/DFA.lean,Mathlib/Computability/RegularExpressions.lean,Mathlib/Control/Monad/Cont.lean,Mathlib/Data/Finset/Attach.lean,Mathlib/Data/Finset/Defs.lean,Mathlib/Data/Finset/Empty.lean,Mathlib/Data/Finsupp/Notation.lean,Mathlib/Data/Fintype/Defs.lean,Mathlib/Data/Fintype/EquivFin.lean,Mathlib/Data/Int/LeastGreatest.lean,Mathlib/Data/List/Chain.lean,Mathlib/Data/List/Flatten.lean,Mathlib/Data/List/SplitOn.lean,Mathlib/Data/List/Triplewise.lean,Mathlib/Data/Multiset/ZeroCons.lean,Mathlib/Data/Nat/Digits/Defs.lean,Mathlib/Data/Set/Basic.lean,Mathlib/Data/Set/Insert.lean,Mathlib/Data/Set/Operations.lean,Mathlib/Data/String/Basic.lean,Mathlib/Data/String/Defs.lean,Mathlib/Data/String/Lemmas.lean,Mathlib/Lean/Elab/InfoTree.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/LebesgueDifferentiationThm.lean,Mathlib/Order/CompleteLattice/MulticoequalizerDiagram.lean,Mathlib/SetTheory/PGame/Basic.lean,Mathlib/Tactic/Basic.lean,Mathlib/Tactic/DeclarationNames.lean,Mathlib/Tactic/Hint.lean,Mathlib/Tactic/Linter/CommandStart.lean,Mathlib/Tactic/Linter/DocString.lean,Mathlib/Tactic/Linter/Header.lean,Mathlib/Tactic/Linter/TextBased.lean,Mathlib/Tactic/Says.lean,Mathlib/Tactic/SuccessIfFailWithMsg.lean,Mathlib/Tactic/ToAdditive/Frontend.lean,Mathlib/Tactic/ToAdditive/GuessName.lean,Mathlib/Tactic/ToExpr.lean,Mathlib/Tactic/Widget/Calc.lean,Mathlib/Tactic/Widget/CongrM.lean,Mathlib/Tactic/Widget/Conv.lean,Mathlib/Tactic/Widget/GCongr.lean,Mathlib/Tactic/Widget/InteractiveUnfold.lean,Mathlib/Tactic/Widget/LibraryRewrite.lean,Mathlib/Tactic/Widget/SelectPanelUtils.lean,Mathlib/Util/CompileInductive.lean,Mathlib/Util/Superscript.lean,MathlibTest/CalcQuestionMark.lean,MathlibTest/Change.lean,MathlibTest/DeprecateTo.lean,MathlibTest/FieldSimp.lean,MathlibTest/FindSyntax.lean,MathlibTest/LibraryRewrite.lean,MathlibTest/LibrarySearch/basic.lean,MathlibTest/LibrarySearch/mathlib.lean,MathlibTest/LibrarySearch/observe.lean,MathlibTest/Simps.lean,MathlibTest/Subsingleton.lean,MathlibTest/Use.lean,MathlibTest/Util/PrintSorries.lean,MathlibTest/Variable.lean,MathlibTest/fast_instance.lean,MathlibTest/grind/pairwise_disjoint.lean,MathlibTest/hint.lean,MathlibTest/propose.lean,MathlibTest/rewrites.lean,MathlibTest/ring.lean,MathlibTest/says.lean,MathlibTest/says_whitespace.lean,MathlibTest/success_if_fail_with_msg.lean,MathlibTest/toAdditive.lean,lake-manifest.json,lakefile.lean,lean-toolchain,scripts/check-yaml.lean,scripts/noshake.json 92 4 ['github-actions', 'leanprover-bot', 'mathlib4-merge-conflict-bot', 'thorimur'] nobody
179-40072
5 months ago
unknown
0-0
0 seconds
30643 thorimur
author:thorimur
 bench: before lean4#10832 merge-conflict large-import 507/460 .github/workflows/nightly-docgen.yml,Cache/IO.lean,Mathlib.lean,Mathlib/Algebra/Algebra/StrictPositivity.lean,Mathlib/Algebra/BigOperators/Group/List/Basic.lean,Mathlib/Algebra/BigOperators/Group/List/Lemmas.lean,Mathlib/Algebra/Group/Units/Defs.lean,Mathlib/Algebra/Notation/Defs.lean,Mathlib/Algebra/Order/Ring/Unbundled/Rat.lean,Mathlib/Algebra/Polynomial/RuleOfSigns.lean,Mathlib/AlgebraicTopology/SimplexCategory/GeneratorsRelations/NormalForms.lean,Mathlib/Analysis/LocallyConvex/WithSeminorms.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/ExpLog.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/Rpow/Basic.lean,Mathlib/Combinatorics/SimpleGraph/CompleteMultipartite.lean,Mathlib/Combinatorics/SimpleGraph/FiveWheelLike.lean,Mathlib/Computability/DFA.lean,Mathlib/Computability/RegularExpressions.lean,Mathlib/Control/Monad/Cont.lean,Mathlib/Data/Finset/Attach.lean,Mathlib/Data/Finset/Defs.lean,Mathlib/Data/Finset/Empty.lean,Mathlib/Data/Finsupp/Notation.lean,Mathlib/Data/Fintype/Defs.lean,Mathlib/Data/Fintype/EquivFin.lean,Mathlib/Data/Int/LeastGreatest.lean,Mathlib/Data/List/Chain.lean,Mathlib/Data/List/Flatten.lean,Mathlib/Data/List/SplitOn.lean,Mathlib/Data/List/Triplewise.lean,Mathlib/Data/Multiset/ZeroCons.lean,Mathlib/Data/Nat/Digits/Defs.lean,Mathlib/Data/Set/Basic.lean,Mathlib/Data/Set/Insert.lean,Mathlib/Data/Set/Operations.lean,Mathlib/Data/String/Basic.lean,Mathlib/Data/String/Defs.lean,Mathlib/Data/String/Lemmas.lean,Mathlib/Lean/Elab/InfoTree.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/LebesgueDifferentiationThm.lean,Mathlib/Order/CompleteLattice/MulticoequalizerDiagram.lean,Mathlib/SetTheory/PGame/Basic.lean,Mathlib/Tactic/Basic.lean,Mathlib/Tactic/DeclarationNames.lean,Mathlib/Tactic/Hint.lean,Mathlib/Tactic/Linter/CommandStart.lean,Mathlib/Tactic/Linter/DocString.lean,Mathlib/Tactic/Linter/Header.lean,Mathlib/Tactic/Linter/TextBased.lean,Mathlib/Tactic/Says.lean,Mathlib/Tactic/SuccessIfFailWithMsg.lean,Mathlib/Tactic/ToAdditive/Frontend.lean,Mathlib/Tactic/ToAdditive/GuessName.lean,Mathlib/Tactic/ToExpr.lean,Mathlib/Tactic/Widget/Calc.lean,Mathlib/Tactic/Widget/CongrM.lean,Mathlib/Tactic/Widget/Conv.lean,Mathlib/Tactic/Widget/GCongr.lean,Mathlib/Tactic/Widget/InteractiveUnfold.lean,Mathlib/Tactic/Widget/LibraryRewrite.lean,Mathlib/Tactic/Widget/SelectPanelUtils.lean,Mathlib/Util/CompileInductive.lean,Mathlib/Util/Superscript.lean,MathlibTest/CalcQuestionMark.lean,MathlibTest/Change.lean,MathlibTest/DeprecateTo.lean,MathlibTest/FieldSimp.lean,MathlibTest/FindSyntax.lean,MathlibTest/LibraryRewrite.lean,MathlibTest/LibrarySearch/basic.lean,MathlibTest/LibrarySearch/mathlib.lean,MathlibTest/LibrarySearch/observe.lean,MathlibTest/Simps.lean,MathlibTest/Subsingleton.lean,MathlibTest/Use.lean,MathlibTest/Util/PrintSorries.lean,MathlibTest/Variable.lean,MathlibTest/fast_instance.lean,MathlibTest/grind/pairwise_disjoint.lean,MathlibTest/hint.lean,MathlibTest/propose.lean,MathlibTest/rewrites.lean,MathlibTest/ring.lean,MathlibTest/says.lean,MathlibTest/says_whitespace.lean,MathlibTest/success_if_fail_with_msg.lean,MathlibTest/toAdditive.lean,lake-manifest.json,lakefile.lean,lean-toolchain,scripts/check-yaml.lean,scripts/noshake.json 92 4 ['github-actions', 'leanprover-bot', 'mathlib4-merge-conflict-bot', 'thorimur'] nobody
179-40071
5 months ago
unknown
0-0
0 seconds
30460 janithamalith
author:janithamalith
 feat(Nat): add lemma nat_card_orbit_mul_card_stabilizer_eq_card_group Added a lemma `nat_card_orbit_mul_card_stabilizer_eq_card_group` which is the Nat.card version of MulAction.card_orbit_mul_card_stabilizer_eq_card_group --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-group-theory new-contributor 6/0 Mathlib/GroupTheory/GroupAction/CardCommute.lean 1 17 ['github-actions', 'kckennylau', 'plp127', 'tb65536'] tb65536
assignee:tb65536
178-49158
5 months ago
178-49158
178 days ago
8-8414
8 days
30209 Ruben-VandeVelde
author:Ruben-VandeVelde
 feat: some TwoSidedIdeal.span lemmas --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-ring-theory FLT 16/0 Mathlib/RingTheory/TwoSidedIdeal/Operations.lean 1 2 ['erdOne', 'github-actions'] erdOne
assignee:erdOne
177-20452
5 months ago
177-20452
177 days ago
17-9153
17 days
25225 xcloudyunx
author:xcloudyunx
 feat(Combinatorics/SimpleGraph): Eulerian walk in connected graph contains all vertices --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-combinatorics new-contributor 16/0 Mathlib/Combinatorics/SimpleGraph/Trails.lean 1 6 ['IvanRenison', 'github-actions', 'vlad902'] kmill
assignee:kmill
177-12690
5 months ago
177-12690
177 days ago
148-3338
148 days
27206 grhkm21
author:grhkm21
 feat(CategoryTheory/Adjunction): partial adjoints are adjoints Partial adjunctions `F.partial{Left,Right}Adjunction` are adjunctions when fully defined i.e. `F.{left,right}AdjointObjIsDefined = ⊤`. awaiting-author t-category-theory 48/2 Mathlib/CategoryTheory/Adjunction/PartialAdjoint.lean 1 1 ['github-actions'] nobody
176-44926
5 months ago
274-56908
274 days ago
0-89
1 minute
27196 YaelDillies
author:YaelDillies
 refactor(Polynomial/Bivariate): swap `X` and `Y` for improved notation This way, `X` keeps on being `X`. From Toric --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra toric
label:t-algebra$
 3/3 Mathlib/Algebra/Polynomial/Bivariate.lean 1 7 ['YaelDillies', 'alreadydone', 'github-actions', 'kckennylau'] nobody
176-38479
5 months ago
274-64952
274 days ago
0-79
1 minute
24532 robertmaxton42
author:robertmaxton42
 feat(LinearAlgebra/FreeProduct): fill out the `FreeProduct.asPowers` namespace * Replicate the existing API for `LinearAlgebra.FreeProduct` under `FreeProduct.asPowers`, for convenience when working primarily with the power algebra representation * Adds convenience lemmas for using the corresponding quotient relation `rel'` (used in the above). --- - [x] depends on: #24531 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 122/5 Mathlib/LinearAlgebra/FreeProduct/Basic.lean 1 26 ['YaelDillies', 'adomani', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'robertmaxton42'] nobody
176-2540
5 months ago
340-70061
340 days ago
0-47835
13 hours
27683 dupuisf
author:dupuisf
 feat: grind tags for set operations This PR adds `grind` tags for various set operations (union, intersection, complement, etc). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 29/9 Mathlib/Data/Set/Basic.lean,Mathlib/Data/Set/Operations.lean 2 5 ['dupuisf', 'euprunin', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
175-40229
5 months ago
258-44736
258 days ago
0-5675
1 hour
30828 DeVilhena-Paulo
author:DeVilhena-Paulo
 feat: implementation of `Finmap.merge` The main contribution of this pull request is the implementation of a `merge` function for finite maps (`Finmap`). The construction relies on the definition of a `merge` function for association lists (`AList`). There is also a side (unrelated) contribution on `Mathlib/Data/List/Permutation.lean`: the addition of a theorem about the permutation of a list with a head element (that is, a list of the form `a :: l`). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor 449/3 Mathlib/Data/Finmap.lean,Mathlib/Data/List/AList.lean,Mathlib/Data/List/Permutation.lean,Mathlib/Data/List/Sigma.lean 4 1 ['github-actions'] nobody
175-36122
5 months ago
175-36190
175 days ago
0-83
1 minute
29355 girving
author:girving
 feat(Trigonometric): Taylor series bounds for sin and cos Zulip discussion here: https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Better.20.60Real.2Esin.60.20bounds/near/535035576 We also include the full set of intervals on which sin and cos are monotone/antitone. --- Questions to resolve as part of review: 1. I've left the `Finset.sum_range_even` in the new `SeriesBounds` file, but presumably it should go somewhere else (unless you want me to inline it, but that seems worse). 2. Is putting the new Taylor series bounds in a new `SeriesBounds` file right, or should it go in the current `Bounds.lean` file? When I started writing the PR I thought the new bounds would need more imports via more analysis, but it turns out the only new import needed would be `Mathlib.Algebra.BigOperators.Field` which seems lightweight. I am happy with whatever the preference is in terms of file structure. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-analysis 158/0 Mathlib.lean,Mathlib/Algebra/BigOperators/Ring/Finset.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Bounds.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/SeriesBounds.lean 4 28 ['Parcly-Taxel', 'Ruben-VandeVelde', 'adomani', 'girving', 'github-actions', 'llllvvuu', 'mathlib4-merge-conflict-bot', 'urkud'] nobody
175-31612
5 months ago
223-31243
223 days ago
0-77704
21 hours
28298 thorimur
author:thorimur
 chore: dedent `to_additive` docstrings This PR uses automation to dedent `to_additive` docstrings throughout Mathlib. It does not lint against indentation or in any way enforce indentation standards for future docstrings. The convention was chosen in accordance with the discussion and polls at [this Zulip thread](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Poll.3A.20Indentation.20style.20for.20.60to_additive.60.20docstrings/with/534285603). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict documentation awaiting-author 949/949 Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/BigOperators/Finsupp/Basic.lean,Mathlib/Algebra/BigOperators/Group/Finset/Lemmas.lean,Mathlib/Algebra/BigOperators/Group/List/Basic.lean,Mathlib/Algebra/BigOperators/Group/Multiset/Defs.lean,Mathlib/Algebra/BigOperators/Pi.lean,Mathlib/Algebra/Category/Grp/Basic.lean,Mathlib/Algebra/Category/Grp/FilteredColimits.lean,Mathlib/Algebra/Category/Grp/Limits.lean,Mathlib/Algebra/Category/Grp/Ulift.lean,Mathlib/Algebra/Category/MonCat/Basic.lean,Mathlib/Algebra/Category/MonCat/FilteredColimits.lean,Mathlib/Algebra/Category/MonCat/Limits.lean,Mathlib/Algebra/Category/Semigrp/Basic.lean,Mathlib/Algebra/Free.lean,Mathlib/Algebra/FreeMonoid/Basic.lean,Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/Group/Action/Pi.lean,Mathlib/Algebra/Group/Action/Pointwise/Finset.lean,Mathlib/Algebra/Group/Basic.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Embedding.lean,Mathlib/Algebra/Group/Equiv/Basic.lean,Mathlib/Algebra/Group/Equiv/Defs.lean,Mathlib/Algebra/Group/Equiv/Opposite.lean,Mathlib/Algebra/Group/Even.lean,Mathlib/Algebra/Group/Hom/Basic.lean,Mathlib/Algebra/Group/Hom/Defs.lean,Mathlib/Algebra/Group/Hom/Instances.lean,Mathlib/Algebra/Group/Indicator.lean,Mathlib/Algebra/Group/Pi/Lemmas.lean,Mathlib/Algebra/Group/Pi/Units.lean,Mathlib/Algebra/Group/Pointwise/Finset/Basic.lean,Mathlib/Algebra/Group/Pointwise/Set/Basic.lean,Mathlib/Algebra/Group/Prod.lean,Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/Algebra/Group/Subgroup/Defs.lean,Mathlib/Algebra/Group/Subgroup/Ker.lean,Mathlib/Algebra/Group/Subgroup/Lattice.lean,Mathlib/Algebra/Group/Subgroup/Map.lean,Mathlib/Algebra/Group/Subgroup/Pointwise.lean,Mathlib/Algebra/Group/Submonoid/Basic.lean,Mathlib/Algebra/Group/Submonoid/BigOperators.lean,Mathlib/Algebra/Group/Submonoid/Defs.lean,Mathlib/Algebra/Group/Submonoid/Membership.lean,Mathlib/Algebra/Group/Submonoid/MulAction.lean,Mathlib/Algebra/Group/Submonoid/Operations.lean,Mathlib/Algebra/Group/Subsemigroup/Basic.lean,Mathlib/Algebra/Group/Subsemigroup/Operations.lean,Mathlib/Algebra/Group/UniqueProds/Basic.lean,Mathlib/Algebra/Group/Units/Defs.lean,Mathlib/Algebra/Group/Units/Equiv.lean,Mathlib/Algebra/Group/Units/Hom.lean,Mathlib/Algebra/Group/Units/Opposite.lean,Mathlib/Algebra/Notation/Pi/Basic.lean,Mathlib/Algebra/Opposites.lean,Mathlib/Algebra/Order/BigOperators/Group/List.lean,Mathlib/Algebra/Order/Group/Abs.lean,Mathlib/Algebra/Order/Group/Basic.lean,Mathlib/Algebra/Order/Group/Cone.lean,Mathlib/Algebra/Order/Group/OrderIso.lean,Mathlib/Algebra/Order/Group/Units.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Order/Monoid/Basic.lean,Mathlib/Algebra/Order/Monoid/Canonical/Defs.lean,Mathlib/Algebra/Order/Monoid/Submonoid.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Basic.lean,Mathlib/Algebra/Order/Monoid/Unbundled/WithTop.lean,Mathlib/Algebra/Order/Monoid/Units.lean,Mathlib/Algebra/Order/Pi.lean,Mathlib/Algebra/Regular/Defs.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/CategoryTheory/Monoidal/Discrete.lean,Mathlib/Data/Finset/NoncommProd.lean,Mathlib/Data/Fintype/BigOperators.lean,Mathlib/Data/Set/MulAntidiagonal.lean,Mathlib/Data/Set/SMulAntidiagonal.lean,Mathlib/Data/Vector/Basic.lean,Mathlib/Dynamics/Ergodic/Action/OfMinimal.lean,Mathlib/Dynamics/FixedPoints/Prufer.lean,Mathlib/Geometry/Manifold/Algebra/SmoothFunctions.lean,Mathlib/GroupTheory/Complement.lean,Mathlib/GroupTheory/Congruence/Basic.lean,Mathlib/GroupTheory/Congruence/Defs.lean,Mathlib/GroupTheory/Coprod/Basic.lean,Mathlib/GroupTheory/Coset/Basic.lean,Mathlib/GroupTheory/Divisible.lean,Mathlib/GroupTheory/EckmannHilton.lean,Mathlib/GroupTheory/FreeGroup/Basic.lean,Mathlib/GroupTheory/FreeGroup/Reduce.lean,Mathlib/GroupTheory/GroupAction/Basic.lean,Mathlib/GroupTheory/GroupAction/Blocks.lean,Mathlib/GroupTheory/GroupAction/Defs.lean,Mathlib/GroupTheory/GroupAction/FixedPoints.lean,Mathlib/GroupTheory/GroupAction/Hom.lean,Mathlib/GroupTheory/GroupAction/MultipleTransitivity.lean,Mathlib/GroupTheory/GroupAction/Primitive.lean,Mathlib/GroupTheory/GroupAction/Quotient.lean,Mathlib/GroupTheory/GroupAction/SubMulAction.lean 141 11 ['eric-wieser', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot', 'thorimur'] nobody
172-66194
5 months ago
246-32019
246 days ago
0-46097
12 hours
28737 astrainfinita
author:astrainfinita
 refactor: deprecate `MulEquivClass` This PR continues the work from #18806. Original PR: https://github.com/leanprover-community/mathlib4/pull/18806 merge-conflict awaiting-author t-algebra
label:t-algebra$
 67/77 Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/Group/Equiv/Basic.lean,Mathlib/Algebra/Group/Equiv/Defs.lean,Mathlib/Algebra/Group/Irreducible/Lemmas.lean,Mathlib/Algebra/Group/Subgroup/Map.lean,Mathlib/Algebra/Group/Submonoid/Operations.lean,Mathlib/Algebra/Group/Units/Equiv.lean,Mathlib/Algebra/GroupWithZero/Equiv.lean,Mathlib/Algebra/GroupWithZero/NonZeroDivisors.lean,Mathlib/Algebra/Module/Equiv/Defs.lean,Mathlib/Algebra/Order/CauSeq/Basic.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Prime/Lemmas.lean,Mathlib/Algebra/Ring/Divisibility/Basic.lean,Mathlib/Algebra/Ring/Equiv.lean,Mathlib/Algebra/Star/MonoidHom.lean,Mathlib/Combinatorics/Additive/FreimanHom.lean,Mathlib/GroupTheory/GroupExtension/Defs.lean,Mathlib/GroupTheory/Submonoid/Center.lean,Mathlib/LinearAlgebra/FreeModule/Finite/CardQuotient.lean,Mathlib/RingTheory/Bialgebra/Equiv.lean,Mathlib/RingTheory/Ideal/Norm/AbsNorm.lean,Mathlib/RingTheory/Multiplicity.lean,Mathlib/RingTheory/UniqueFactorizationDomain/NormalizedFactors.lean,Mathlib/Topology/Algebra/ContinuousMonoidHom.lean,Mathlib/Topology/Algebra/InfiniteSum/Basic.lean 26 20 ['Vierkantor', 'alreadydone', 'astrainfinita', 'github-actions', 'grunweg', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'mathlib4-merge-conflict-bot'] Vierkantor
assignee:Vierkantor
170-68609
5 months ago
234-28782
234 days ago
2-31233
2 days
28676 sun123zxy
author:sun123zxy
 feat(NumberTheory/ArithmeticFunction): wrap `Nat.totient` as an `ArithmeticFunction` This wraps the Euler's totient function `Nat.totient` into a new `ArithmeticFunction` `ϕ`, with some basic identities such as `ϕ * ζ = id` and `μ * id = ϕ.` --- We use the notation `ϕ` to distinguish from `Nat.totient`'s notation `φ`, however this might be controversial. Suggestions are welcome! [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory new-contributor large-import merge-conflict awaiting-author 45/5 Mathlib/NumberTheory/ArithmeticFunction.lean 1 19 ['MichaelStollBayreuth', 'SnirBroshi', 'b-mehta', 'eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot', 'riccardobrasca', 'sun123zxy'] MichaelStollBayreuth
assignee:MichaelStollBayreuth
170-68561
5 months ago
186-43237
186 days ago
47-58551
47 days
30299 franv314
author:franv314
 feat(Topology/Instances): Cantor set Prove that the Cantor set has empty interior and the cardinality of the continuum as discussed on [Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/A.20few.20results.20about.20the.20Cantor.20set/with/543560670) Moves: - Mathlib.Topology.Instances.CantorSet -> Mathlib.Topology.Instances.CantorSet.Basic --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor merge-conflict file-removed awaiting-author t-topology 355/2 Mathlib.lean,Mathlib/Topology/Instances/CantorSet/Basic.lean,Mathlib/Topology/Instances/CantorSet/Cardinality.lean,Mathlib/Topology/Instances/CantorSet/Lemmas.lean 4 5 ['github-actions', 'grunweg', 'kckennylau', 'mathlib4-merge-conflict-bot'] nobody
170-60291
5 months ago
191-42920
191 days ago
0-2409
40 minutes
30303 franv314
author:franv314
 chore(Topology/Instances): add deprecated module Add deprecated module to moved Cantor set file. --- - [ ] depends on: #30299 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR new-contributor 486/124 Mathlib.lean,Mathlib/Topology/Instances/CantorSet.lean,Mathlib/Topology/Instances/CantorSet/Basic.lean,Mathlib/Topology/Instances/CantorSet/Cardinality.lean,Mathlib/Topology/Instances/CantorSet/Lemmas.lean 5 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
170-60289
5 months ago
191-40789
191 days ago
0-340
5 minutes
30575 urkud
author:urkud
 feat: lemmas about `_ • _` on Filters as well as `Set.Finite.f?derivWithin_eq`. I wrote these lemmas for #24019, but the final version of that PR doesn't need them. I moved them here so that I don't forget to prepare a non-draft PR with these lemmas. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 51/0 Mathlib/Topology/TODO.lean 1 3 ['github-actions', 'plp127', 'urkud'] nobody
170-39457
5 months ago
unknown
0-0
0 seconds
27976 smmercuri
author:smmercuri
 feat: `ramificationIdx` for `NumberField.InfinitePlace` This PR continues the work from #24884. Original PR: https://github.com/leanprover-community/mathlib4/pull/24884 merge-conflict WIP t-number-theory 22/0 Mathlib/NumberTheory/NumberField/InfinitePlace/Ramification.lean 1 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
169-46131
5 months ago
254-62116
254 days ago
0-57
57 seconds
26357 javra
author:javra
 feat(CategoryTheory): linear categories as `ModuleCat R`-enriched categories Continues #23826. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory large-import 197/0 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Basic.lean,Mathlib/CategoryTheory/Enriched/Linear.lean,Mathlib/CategoryTheory/Linear/Basic.lean,Mathlib/CategoryTheory/Monoidal/Linear.lean 5 10 ['adamtopaz', 'github-actions', 'javra', 'mathlib4-merge-conflict-bot'] adamtopaz
assignee:adamtopaz
168-4726
5 months ago
212-31379
212 days ago
78-30158
78 days
26085 grunweg
author:grunweg
 feat: disjoint unions distribute with products of manifolds This PR continues the work from #22611. Original PR: https://github.com/leanprover-community/mathlib4/pull/22611 please-adopt WIP t-differential-geometry merge-conflict 75/6 Mathlib/Geometry/Manifold/Diffeomorph.lean,Mathlib/Geometry/Manifold/LocalDiffeomorph.lean 2 3 ['github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] nobody
167-63129
5 months ago
302-53931
302 days ago
0-74
1 minute
27180 ADedecker
author:ADedecker
 feat: quotient of a monoid with zero by a multiplicative congruence --- My motivation is getting a more conceptual construction of [ValuativeRel.ValueGroupWithZero](https://leanprover-community.github.io/mathlib4_docs/Mathlib/RingTheory/Valuation/ValuativeRel.html#ValuativeRel.ValueGroupWithZero), but I think this is of independent interest. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra delegated
label:t-algebra$
 141/26 Mathlib.lean,Mathlib/Data/Quot.lean,Mathlib/Data/Setoid/Basic.lean,Mathlib/GroupTheory/Congruence/Defs.lean,Mathlib/GroupTheory/Congruence/GroupWithZero.lean 5 32 ['ADedecker', 'eric-wieser', 'github-actions', 'mathlib-bors', 'mathlib4-merge-conflict-bot', 'ocfnash'] ocfnash
assignee:ocfnash
167-51865
5 months ago
246-67400
246 days ago
28-12053
28 days
29570 eric-wieser
author:eric-wieser
 fix: substitute infotrees in linters I don't know whether this is necessary in these particular cases, but I've seen places where it is. There are a handful more of these cases in Batteries. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 2/2 Mathlib/Tactic/Linter/Style.lean,Mathlib/Tactic/TacticAnalysis.lean 2 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
167-48366
5 months ago
unknown
0-0
0 seconds
30790 urkud
author:urkud
 chore: partially migrate from `ContinuousMap.continuous` ... to `map_continuous` or `by fun_prop`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 37/45 Mathlib/AlgebraicGeometry/Morphisms/Constructors.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/Basic.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/FundamentalGroup.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Restrict.lean,Mathlib/Analysis/Complex/Circle.lean,Mathlib/Analysis/Fourier/AddCircleMulti.lean,Mathlib/Condensed/Light/TopCatAdjunction.lean,Mathlib/Condensed/TopCatAdjunction.lean,Mathlib/Condensed/TopComparison.lean,Mathlib/Dynamics/Ergodic/Action/OfMinimal.lean,Mathlib/MeasureTheory/Constructions/BorelSpace/Basic.lean,Mathlib/Topology/Category/CompHausLike/Limits.lean,Mathlib/Topology/Compactification/OnePoint/Basic.lean,Mathlib/Topology/Compactness/CompactlyGeneratedSpace.lean,Mathlib/Topology/ContinuousMap/CompactlySupported.lean,Mathlib/Topology/ContinuousMap/Units.lean,Mathlib/Topology/ContinuousMap/ZeroAtInfty.lean,Mathlib/Topology/LocallyConstant/Basic.lean,Mathlib/Topology/PartitionOfUnity.lean,Mathlib/Topology/Sets/Opens.lean,Mathlib/Topology/TietzeExtension.lean,Mathlib/Topology/UniformSpace/CompactConvergence.lean,Mathlib/Topology/UniformSpace/Dini.lean,Mathlib/Topology/UrysohnsLemma.lean 24 6 ['erdOne', 'github-actions', 'mathlib4-merge-conflict-bot', 'urkud'] nobody
167-47669
5 months ago
176-20821
176 days ago
0-5460
1 hour
30631 ADedecker
author:ADedecker
 refactor: evaluation of power series in semirings --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 665/71 Mathlib/Algebra/Module/Congruence/Defs.lean,Mathlib/RingTheory/MvPowerSeries/EvaluationSemi.lean,Mathlib/Topology/Algebra/LinearTopology.lean,Mathlib/Topology/Algebra/LinearUniformity.lean,Mathlib/Topology/Algebra/TopologicallyNilpotent.lean 5 1 ['github-actions'] nobody
166-47619
5 months ago
unknown
0-0
0 seconds
29871 zach1502
author:zach1502
 feat(Matrix/Transvection): Gauss pivot determinant identity and pivot preservation This PR adds two lemmas formalizing standard Gaussian pivot identities: * `Matrix.Transvection.listTransvecCol_mul_mul_listTransvecRow_pivot`: After applying the canonical left/right transvection products that clear the last column and row, the pivot (bottom-right) entry of a matrix is unchanged. Marked `@[simp]`. * `Matrix.Transvection.det_eq_detTopLeft_mul_pivot`: If the pivot entry is nonzero, then the determinant of the matrix factors as the determinant of the top-left block times the pivot entry, after performing the canonical transvections. This is the usual Gauss–pivot determinant identity. * Added simple usage tests in `MathlibTest/matrix.lean` to check that the new lemmas are usable by `simp`/`simpa`. --- --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-algebra new-contributor
label:t-algebra$
 94/0 Mathlib/LinearAlgebra/Matrix/Transvection.lean,MathlibTest/matrix.lean 2 3 ['github-actions', 'riccardobrasca', 'zach1502'] nobody
164-59812
5 months ago
164-59812
164 days ago
41-53612
41 days
30109 scholzhannah
author:scholzhannah
 feat: the subcomplexes of a (relative classical) CW complex form a completely distributive lattice In this PR we prove that the space of subcomplexes `Subcomplex C` of a (relative classical) CW complex `C` is a `CompletelyDistribLattice`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-topology 368/1 Mathlib/Order/Lattice.lean,Mathlib/Topology/CWComplex/Classical/Subcomplex.lean 2 19 ['ADedecker', 'github-actions', 'scholzhannah'] nobody
164-48793
5 months ago
164-48793
164 days ago
6-69092
6 days
25692 Whysoserioushah
author:Whysoserioushah
 feat(RingTheory/MatrixAlgebra): add a more general version of `matrixEquivTensor` This adds `tensorMatrixLinearEquiv : A ⊗[R] Matrix n n B ≃ₐ[S] Matrix n n (A ⊗[R] B)` which is a more general version of `matrixEquivTensor : Matrix n n A ≃ₐ[R] (A ⊗[R] Matrix n n R)`. The latter is then implemented as a trivial consequence of the former. Many internal implementation details are deleted without deprecation, although strictly these were not private. Co-authored-by: @erdOne Co-authored-by: Eric Wieser --- - [ ] depends on: #28367 - [ ] depends on: #28359 - [ ] depends on: #28368 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-ring-theory 129/110 Mathlib/RingTheory/MatrixAlgebra.lean 1 28 ['Whysoserioushah', 'chrisflav', 'eric-wieser', 'github-actions', 'jcommelin', 'mathlib-bors', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'mattrobball'] chrisflav
assignee:chrisflav
164-47389
5 months ago
240-70285
240 days ago
47-20776
47 days
25012 urkud
author:urkud
 refactor(*): migrate from `Matrix.toLin'` to `Matrix.mulVecLin` or `Matrix.mulVec` whenever we don't need the `LinearEquiv.symm` part. See [Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Matrix.2EtoLin'.20vs.20Matrix.2EmulVecLin/with/515188548). It makes sense to have only one normal form, and `Matrix.toLin'` has an extra `DecidableEq` assumption. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 165/126 Mathlib/Algebra/Lie/Matrix.lean,Mathlib/Algebra/Module/Equiv/Basic.lean,Mathlib/Analysis/CStarAlgebra/Matrix.lean,Mathlib/Analysis/Matrix.lean,Mathlib/Combinatorics/SimpleGraph/LapMatrix.lean,Mathlib/LinearAlgebra/Basis/Defs.lean,Mathlib/LinearAlgebra/Determinant.lean,Mathlib/LinearAlgebra/Finsupp/VectorSpace.lean,Mathlib/LinearAlgebra/Matrix/BilinearForm.lean,Mathlib/LinearAlgebra/Matrix/Charpoly/Minpoly.lean,Mathlib/LinearAlgebra/Matrix/Diagonal.lean,Mathlib/LinearAlgebra/Matrix/Gershgorin.lean,Mathlib/LinearAlgebra/Matrix/Rank.lean,Mathlib/LinearAlgebra/Matrix/SesquilinearForm.lean,Mathlib/LinearAlgebra/Matrix/SpecialLinearGroup.lean,Mathlib/LinearAlgebra/Matrix/ToLin.lean,Mathlib/LinearAlgebra/Matrix/ToLinearEquiv.lean,Mathlib/LinearAlgebra/UnitaryGroup.lean,Mathlib/MeasureTheory/Measure/Lebesgue/Basic.lean 19 4 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] nobody
164-29790
5 months ago
211-5292
211 days ago
15-4939
15 days
29638 yuma-mizuno
author:yuma-mizuno
 feat(CategoryTheory): define descent data by presieves --- Addendum: I realized that there is prior work in #24434. Since this PR uses a slightly different definition, I plan to make this PR a follow-up to #24434. Until then, I’ll keep it marked as WIP. See the comment: https://github.com/leanprover-community/mathlib4/pull/29638#issuecomment-3290041719 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-category-theory 408/2 Mathlib.lean,Mathlib/CategoryTheory/Bicategory/Functor/Pseudofunctor.lean,Mathlib/CategoryTheory/Bicategory/LocallyDiscrete.lean,Mathlib/CategoryTheory/Category/Cat.lean,Mathlib/CategoryTheory/Stack/Basic.lean,Mathlib/CategoryTheory/Stack/Descent.lean 6 7 ['chrisflav', 'github-actions', 'joelriou', 'mathlib4-merge-conflict-bot', 'yuma-mizuno'] nobody
164-25887
5 months ago
214-56237
214 days ago
0-74
1 minute
30158 nicolaviolette
author:nicolaviolette
 feat: combinatorics simplegraph basic --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-combinatorics new-contributor 9/4 Mathlib/Combinatorics/SimpleGraph/Basic.lean 1 3 ['b-mehta', 'github-actions'] b-mehta
assignee:b-mehta
163-79342
5 months ago
163-79342
163 days ago
31-69826
31 days
28132 dupuisf
author:dupuisf
 feat: preliminary `grind` tags for `IsUnit` This PR adds preliminary `grind` tags for the `IsUnit` predicate. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 61/17 Mathlib/Algebra/Group/Action/Units.lean,Mathlib/Algebra/Group/Units/Defs.lean,Mathlib/Algebra/GroupWithZero/Units/Basic.lean,Mathlib/Algebra/Ring/Units.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Order.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/Rpow/Basic.lean 6 3 ['github-actions', 'mathlib4-merge-conflict-bot'] kim-em
assignee:kim-em
163-21717
5 months ago
163-21718
163 days ago
80-71575
80 days
25903 pfaffelh
author:pfaffelh
 feat(MeasureTheory): finite unions of sets in a semi-ring (in terms of measure theory) form a ring : Finite unions of sets in a semi-ring (in terms of measure theory) form a ring The set containing finite unions of sets in a semi-ring are a ring. Part of `MeasureTheory.SetSemiring` is moved to the new file `MeasureTheory.SetRing`. --- - [ ] depends on: #25902 [contains changes in `SetSemiring` as well] --- *This PR continues the work from #23117.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/23117* merge-conflict blocked-by-other-PR large-import t-measure-probability 648/131 Mathlib.lean,Mathlib/Algebra/Group/Pointwise/Finset/Basic.lean,Mathlib/Algebra/Module/Bimodule.lean,Mathlib/Data/Set/Lattice.lean,Mathlib/Data/Set/Pairwise/Lattice.lean,Mathlib/Data/Set/Prod.lean,Mathlib/MeasureTheory/MeasurableSpace/Pi.lean,Mathlib/MeasureTheory/Measure/AddContent.lean,Mathlib/MeasureTheory/PiSystem.lean,Mathlib/MeasureTheory/SetAlgebra.lean,Mathlib/MeasureTheory/SetRing.lean,Mathlib/MeasureTheory/SetSemiring.lean,Mathlib/Tactic.lean,Mathlib/Tactic/ExtractLets.lean,lake-manifest.json,lakefile.lean 16 5 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
163-9429
5 months ago
241-19975
241 days ago
0-11144
3 hours
28863 yury-harmonic
author:yury-harmonic
 ignore: make CI build oleans It looks like CI doesn't build oleans unless I open a PR. Or I can't see this workflow. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict large-import 624/100 Mathlib/Algebra/MvPolynomial/Eval.lean,Mathlib/Algebra/MvPolynomial/Expand.lean,Mathlib/Algebra/Order/Floor/Semifield.lean,Mathlib/Algebra/Order/Positive/Field.lean,Mathlib/Algebra/Order/Positive/Ring.lean,Mathlib/Data/Int/ModEq.lean,Mathlib/Data/NNRat/Floor.lean,Mathlib/Data/Nat/Factorial/Basic.lean,Mathlib/Data/Nat/ModEq.lean,Mathlib/Data/Nat/NthRoot/Defs.lean,Mathlib/Data/Rat/Floor.lean,Mathlib/Tactic/NormNum/Basic.lean,MathlibTest/norm_num_ext.lean 13 4 ['github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] nobody
162-75840
5 months ago
unknown
0-0
0 seconds
29992 vlad902
author:vlad902
 feat(Order): finite (Max)Chains always contains a top/max element --- - [ ] depends on: #29835 [optional extra text] - [ ] depends on: #29993 [optional extra text] [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-order large-import 35/0 Mathlib/Order/Preorder/Chain.lean 1 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
161-41521
5 months ago
202-73882
202 days ago
0-56
56 seconds
26901 5hv5hvnk
author:5hv5hvnk
 feat: a simproc version of `compute_degree` Wrap `compute_degree` in a simproc for use by simp. Closes #22219. --- awaiting-CI new-contributor merge-conflict awaiting-author t-meta 198/0 Mathlib.lean,Mathlib/Tactic/Simproc/PolynomialDegree.lean,MathlibTest/polynomial_degree_simproc.lean 3 19 ['5hv5hvnk', 'YaelDillies', 'adomani', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
161-39610
5 months ago
282-40980
282 days ago
0-267
4 minutes
26391 grunweg
author:grunweg
 feat: immersed submanifolds Still under construction --- - [ ] depends on: #26087 - [ ] depends on: #23040 Better version of #24549. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-differential-geometry blocked-by-other-PR 1418/0 Mathlib.lean,Mathlib/Analysis/NormedSpace/HahnBanach/Splits.lean,Mathlib/Geometry/Manifold/EmbeddedSubmanifold.lean,Mathlib/Geometry/Manifold/IsImmersionEmbedding.lean,Mathlib/Geometry/Manifold/MSplits.lean 5 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
161-26370
5 months ago
unknown
0-0
0 seconds
31020 grunweg
author:grunweg
 feat: mfderiv of Sum.inl and Sum.inr Nothing to see yet: waiting on the cache, then I will state the sorries and Newell Jansen has expressed interest in trying to prove this. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 64/0 Mathlib/Geometry/Manifold/MFDeriv/SpecificFunctions.lean 1 4 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
161-25138
5 months ago
170-39617
170 days ago
0-1
1 second
31340 kim-em
author:kim-em
 feat: helper script to summarize CI errors --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI 235/0 scripts/README.md,scripts/failing_ci.py 2 1 ['github-actions'] nobody
161-11292
5 months ago
unknown
0-0
0 seconds
25775 emilyriehl
author:emilyriehl
 feat(AlgebraicTopology/SimplicialSet/NerveAdjunction): to Strict Segal 2 Under a suitable hypothesis, a map of 2-truncated simplicial sets can be generated from a refl prefunctor between the underlying reflexive quivers --- provided the codomain is `StrictSegal`. This abstracts a previously formalized result that requires the codomain to be the 2-truncated nerve of a category. Co-authored-by: Aaron Liu --- The current draft displays the old code for comparison with new versions labeled ALT. After initial review this will be cut. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #23848.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/23848* t-algebraic-topology t-category-theory merge-conflict awaiting-author infinity-cosmos 421/206 Mathlib/AlgebraicTopology/SimplexCategory/Basic.lean,Mathlib/AlgebraicTopology/SimplexCategory/Defs.lean,Mathlib/AlgebraicTopology/SimplicialSet/HomotopyCat.lean,Mathlib/AlgebraicTopology/SimplicialSet/NerveAdjunction.lean,Mathlib/AlgebraicTopology/SimplicialSet/StrictSegal.lean,Mathlib/CategoryTheory/ComposableArrows.lean,Mathlib/CategoryTheory/EqToHom.lean 7 38 ['emilyriehl', 'github-actions', 'joelriou', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot', 'robin-carlier'] robin-carlier
assignee:robin-carlier
158-40948
5 months ago
239-33674
239 days ago
17-16247
17 days
14752 AntoineChambert-Loir
author:AntoineChambert-Loir
 fix(Topology/Algebra/Valued): repair definition of Valued Following a [discussion on Zulip](https://leanprover.zulipchat.com/#narrow/stream/116395-maths/topic/Question.20about.20.60Valued.2Eis_topological_valuation.60), we modify the definition of the field `is_topological_valuation` of `Valued` insisting that the element $\gamma$ showing up there is in the subgroup generated by the image of the valuation map. Co-authored-by: @faenuccio - [x] depends on: #25496 merge-conflict WIP t-topology t-algebra
label:t-algebra$
 1166/301 Mathlib.lean,Mathlib/Algebra/GroupWithZero/Range.lean,Mathlib/NumberTheory/NumberField/FinitePlaces.lean,Mathlib/RingTheory/LaurentSeries.lean,Mathlib/RingTheory/Valuation/Basic.lean,Mathlib/RingTheory/Valuation/RankOne.lean,Mathlib/Topology/Algebra/Valued/LocallyCompact.lean,Mathlib/Topology/Algebra/Valued/NormedValued.lean,Mathlib/Topology/Algebra/Valued/ValuationTopology.lean,Mathlib/Topology/Algebra/Valued/ValuedField.lean,Mathlib/Topology/UniformSpace/AbstractCompletion.lean,docs/references.bib 12 28 ['AntoineChambert-Loir', 'faenuccio', 'github-actions', 'jcommelin', 'kbuzzard', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'riccardobrasca'] nobody
157-28389
5 months ago
315-39270
315 days ago
1-33784
1 day
26827 pechersky
author:pechersky
 feat(Analysis/Normed/ValuativeRel): helper instance for NormedField --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #26713 - [x] depends on: #26826 merge-conflict t-algebra t-number-theory t-analysis
label:t-algebra$
 211/27 Mathlib.lean,Mathlib/Analysis/Normed/ValuativeRel.lean,Mathlib/Topology/Algebra/Valued/ValuativeRel.lean 3 34 ['ADedecker', 'adamtopaz', 'erdOne', 'github-actions', 'kbuzzard', 'kckennylau', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'pechersky'] kbuzzard
assignee:kbuzzard
155-50321
5 months ago
155-50321
155 days ago
122-67006
122 days
30150 imbrem
author:imbrem
 feat(CategoryTheory/Monoidal): to_additive for MonoidalCategory Add `AddMonoidalCategory`, the additive version of `MonoidalCategory`. To get this to work, I needed to _remove_ the `to_additive` attributes in `Discrete.lean`, since existing code relies on the `AddMonoid M → MonoidalCategory M` instance. For now, we simply implement the additive variants by hand instead. --- As discussed in #28718; I added an `AddMonoidalCategory` struct and tagged `MonoidalCategory` with `to_additive`, along with the lemmas in `Category.lean`. I think this is the right approach, since under this framework the "correct" additive version of `Discrete.lean` would be mapping an `AddMonoid` to an `AddMonoidalCategory`. Next steps would be to: - Make `monoidal_coherence` and `coherence` support `AddMonoidalCategory` - Add `CocartesianMonoidalCategory` extending `AddMonoidalCategory` [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory large-import new-contributor merge-conflict awaiting-zulip t-meta 444/125 Mathlib/CategoryTheory/Monoidal/Category.lean,Mathlib/CategoryTheory/Monoidal/Discrete.lean,Mathlib/Tactic/ToAdditive/GuessName.lean 3 22 ['JovanGerb', 'YaelDillies', 'github-actions', 'imbrem', 'mathlib4-merge-conflict-bot'] nobody
155-2601
5 months ago
194-67667
194 days ago
1-160
1 day
27135 JovanGerb
author:JovanGerb
 feat: `gconvert` tactic The `gconvert` tactic calls `gcongr` internally, and it can be used as replacement/generalization of `peel`. One drawback is that `peel` can unfold definitions until they are a binder, while `gconvert` cannot, but I think this is acceptable. TODO: replace all uses of `peel` with either `gconvert` or `congr!` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta 320/17 Mathlib/Tactic/GCongr/Core.lean,MathlibTest/GConvert.lean 2 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
154-31746
5 months ago
276-46343
276 days ago
0-5
5 seconds
25765 JovanGerb
author:JovanGerb
 feat(gcongr): lemma for rewriting inside divisibility TODO: add test to show that we can rewrite using `a ≡ b [ZMOD n]` inside `n ∣ 2 * a + 1`. edit: it's not yet entirely clear if this is the right thing to do. edit: This lemma should be written using iff (or =), so that we can use it specifically when rewriting with a symmetric relation. Supporting equality in `gcongr` is still work in progress. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) delegated t-data 5/0 Mathlib/Data/Int/ModEq.lean 1 3 ['fpvandoorn', 'github-actions', 'mathlib-bors'] nobody
153-61867
5 months ago
307-48147
307 days ago
1-19951
1 day
30978 dagurtomas
author:dagurtomas
 Draft: adic spaces --- This is work in progress, mostly ported from the perfectoid project [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict large-import 1407/45 Mathlib.lean,Mathlib/AdicSpace/AdicSpace.lean,Mathlib/AdicSpace/HuberPair.lean,Mathlib/AdicSpace/Spa/RationalOpenData.lean,Mathlib/AdicSpace/Spa/StalkValuation.lean,Mathlib/AdicSpace/Spa/StructurePresheaf.lean,Mathlib/AdicSpace/Spv.lean,Mathlib/Topology/Category/TopCommRingCat.lean 8 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
153-43300
5 months ago
171-36119
171 days ago
0-12
12 seconds
30824 grunweg
author:grunweg
 wip: another smoothness lemma for local frames --- Can I prove in general that the coefficients of a smooth section w.r.t. a smooth local frame are smooth? This is certainly true for orthonormal frames... [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-differential-geometry 57/9 Mathlib/Geometry/Manifold/VectorBundle/LocalFrame.lean 1 3 ['github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] nobody
152-31638
5 months ago
175-43115
175 days ago
0-6
6 seconds
30770 robertmaxton42
author:robertmaxton42
 (WIP) Limits and Colimits in Quiv WIP PR for the oleans ---